DE1190517B - Circuit arrangement for centrally controlled telephone switching systems - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY GERMAN 4J07WW PATENT OFFICE Int. CL:

H04m

EDITORIAL

German class: 21 a3- 32/01

Number:
File number:
Registration date:
Display day:

S 80896 VIII a / 21 a3
August 13, 1962
April 8, 1965

Switching systems, in particular for telephone purposes, are already known in which a central Control part is provided, which is an independent device in addition to the speech network from the for represents the connection of lines and contacts serving participants. The central control part serves essentially for the production and separation of compounds. There are several in each case handle individual mediation processes, e.g. B. the provision of election information receiving facility for a subscriber who reports, furthermore the recording of the election information yourself, the search for a suitable connection, etc.

It is now already known to have such a central control part made up of several control devices build up, e.g. B. from markers that each have to handle different switching processes, and from memories that have to keep various information required for this.

The invention now shows a way in which the breakdown of the control part is made particularly expedient can be, in such a way that there is, among other things, a particularly powerful Control device can be provided.

Among other things, there is a particular advantage that the effort is relatively low remain.

The invention accordingly relates to a circuit arrangement for centrally controlled switching systems, in particular for telephone purposes, in which information about the operating status of the various associated switching devices is stored centrally. This circuit arrangement is characterized in that the control part, which is separated from the speech network and is divided into several control devices provided with information memories, has a central transfer control device which, by exchanging information with other control devices in its intermediate memory with several memory cells, collects partial information arriving one after the other in the same memory cell, Information supplied by a subscriber or a special memory cell representing them with regard to the delivery of information includes information, to which a memory cell of the buffer is only temporarily allocated by writing the address of the point supplying the information, so that the number of memory cells in the buffer is the maximum number that exists simultaneously Connections falls below, and that the circuit arrangement for centrally controlled
Telephone switching systems

Applicant:

Siemens & Halske Aktiengesellschaft,
Berlin and Munich,

Munich 2, Wittelsbacherplatz 2

Named as inventor:
Dipl.-Ing. Dieter Voegtlen,
Dipl.-Ing. Wolfram Ernst, Munich

Information or partial information in the transfer control device if necessary checked and acknowledged and for their forwarding and the following Evaluation transformed and that they are converted if necessary.

In the relay control device according to the invention, by writing the address the location providing the information enables the information to be fetched directly from there with the help allows this address, so that a specific collection can be carried out. Here is Time saved compared to other collection methods, as only the relevant locations are queried will need. Furthermore, since the number of memory cells provided is relatively small, the collected information can be passed on without any time difficulties will. This also means that the means for passing on are not particularly technical Requirements are to be made. Furthermore, there are then relatively few additional buffer stores needed as they are for the delivery of information to termination circuits of lines may be required.

If, in cooperation of the transfer control device with other control devices, several Collective processes are processed at the same time, whereby for recording, reshaping and revaluation Fast-working logic circuits required by information are repeated cyclically one after the other used briefly for partial information belonging to different information

509 538/106

3 4

there is a very advantageous multiple connection with the speech path network K. If to-

utilization of central logic circuits. the next line r / l was used, then

This means that an otherwise necessary route is passed on via line ή 2 of the connection path.

multiplication of the logic circuits saved, so that over the speech path network K then the

is. 5 desired participants is reached.

On the basis of FIG. 1 is the breakdown of one in It should be noted that for the invention also VerFrage coming switching system in its switching systems come into question in which the shown different parts of interest here; Connection path from the calling party to the calling

F i g. 2 shows the structure of a memory for called subscribers only once and therefore only in

mations whose memory cells lead through magnetic io in one direction across the coupling matrix.

Toroidal cores are embodied; The aforementioned parts of connecting

F i g. 3 shows a schematic representation for paths that lead via the speech path network K,

such a memory, which in other figures the

is used as a symbol; central control part, which consists of several control

F i g. 4 shows the structure of a transfer control device. Of course, this serves

Set up from different parts, which Infor- control part also for other tasks. These

mations are supplied and of which they are then control devices here for clarity

be returned; only schematically represented by rectangles

Fig. 5 shows the structure of a query control set. The device designated between them in the processing of device, with their 20 switching processes essentially taking place help from subscriber circuits and from termination information exchange is indicated by arrows, circuits for lines obtained information that lies between these rectangles. That will continue and can also be distributed there; control device is identified by the WG

F i g. 6 shows an example of a subscriber switch represented by a rectangle. The associated intermediate

device or for a termination circuit for a Lei- 25 is designated by SWG . The sharing-

handling with incoming traffic; control device exchanges information with

F i g. 7 shows an example of a termination switch for all other control devices. This includes the

tion for a line with outgoing traffic; Inquiry control devices Tal and TA 2, which

Fig. 8 shows parts of the transfer control device - each with groups of participants or subscribers

processing, which are connected to the counting of periodic calls 30 subscriber circuits. So leads

of memory cells contribute. z. B. from the subscriber circuit Tsa a line

The structure of the interrogation control device valley in FIG. 1 is now first shown. This interrogation-shown switching system explained in order to facilitate the control devices each have two pieces of information to facilitate understanding of the invention. memories with 511 and 521 as well as S12

This switching system consists, among other things, of 35 and 522. With their help, those from the speech path network K, to which, on the one hand, subscriber circuits are more conveniently connected to the subscribers, from which the subscriber-supplied dialing information, etc., are queried. These mer Ta and Tb with their subscriber stations and information are then picked up from them by the forwarding with their subscriber circuits Tsa and Tsb control device WG. Depending on what is shown, and on the other hand, the relay sets are given the nature of this information, they are connected to those to which the relay sets Av and Ai are passed on to other control devices. So who belong. Via the relay set Aν , traffic with the information collected, for example, is routed via subscribers to other exchanges. The connection set up via the speech path network K , the relay set A i , will relate to traffic within the route to which the labeling system is also routed as a marker, ie traffic is passed on between bare setting control devices £ 5. two subscribers of the illustrated switching This setting control device instructs the information system. When establishing a connection from the tion memory SES , which, among other things, contains information subscriber Ta to a subscriber who is connected to an exchange via the occupancy status of the voice path other exchange, network K is initially included. With its help, a possible connection path for subscriber Ta can be searched for via his subscriber switch 50, whereupon Tsa, via which from there to the speech network K the associated setting commands from the adjusting feeder line ta and via the speech control device ES to the speech network K wegeenetz K a connection path z. B. be passed on via the Ab-.

subscriber line rv made to relay set Av . There may also be information about it, e.g. B. in an outgoing from there and come into question 55 other exchanges to be evaluated digits from the exchange leading line is then completed the call numbers, the connection via lines leading there. A compound to be delivered. Such information is passed on from a switching system, not shown, to a partial relay set to the subscriber of the switching system shown, which is assigned to the line in question. B. to the relay set A v. is carried out in a similar way, but with around 60 In the case of relay sets of this type from other exchanges, the reverse order of the connection sections lungs arriving information is produced by the. However, if the production query control device La is queried. This connection from the subscriber to the partial question control device is likewise provided with an information subscriber station Ta to a subscriber who is also provided with a mation memory, which is connected to the switching system shown by the SLA. By means of the forwarding control device WG , the connection path is first routed in a corresponding manner, for example to the relay set Ai , then also this queried information. This passed on for your evaluation. It should be noted that the relay set is available via the lines r / l and r / 2 with the fact that the

5 6

fertilize provided relay sets, to which the partial information is then the mentioned memory relay set A i , by the interrogation control device cell.

device LA can be queried. In order to ensure that in the case of the transfer control multiple it is necessary to remove incoming partial information from incoming call numbers before further evaluation. B. the connection position of the calling, there are addresses of the information He subscriber to determine on the switching matrix or to be registered with remote places, so z. B. Addresses leading to other exchanges connection of subscriber circuits or of special requirements to determine the direction of traffic. Storage cells. These addresses are memory cells, the passing control means WG therefore has enrolled io of the buffer that this access to the corrector UM, in which the data for the revaluations an information supplying unit assigned to the memory means each only temporarily one and the same SUM, are. Which are kept. Cooperation of the latch with SpeI Finally, here a so-called brass connects other control devices and the Gliededungsüberwachungseinrichtung VU provided in the memory ¹ S tion in the memory cells is in F i g. 4 whose information store SVU information is shown on.

In this figure, a special speech path network K is used for the memory for the duration of its existence on the symbol, in order to ensure the representation overview. This makes it easier to make Hch in the given case. This symbol is in itself in the separation of these connecting paths. 2 ° F i g. 3 shown. A detailed representation of the transfer control memory belonging to the control part, which is represented by this symbol, device WG now collects each by information is shown in FIG incoming partial information that this memory also has auxiliary facilities, each for the same one from a subscriber or from ² 5, that it consists of a total of four parts, which are designated with one of these with regard to the delivery of information B, Z, T and A. Part B comprises representing the particular memory cell supplied with the various memory cells. You are here to belong in information. With such information, a three-dimensional scheme is arranged. Each tion can be z. B. to a digit of a from a memory cell is in this embodiment subscriber dialed phone number. This 3 ° consists of three magnetic toroidal cores and therefore has a participant can use the illustrated switching memory capacity of 3 bits. The ring system is directly connected here, or cores B 111, B 112 ... B 443 can also be provided. Of these connected to an exchange (not shown), for example, the ring cores Bill, B 112 and # 113 are connected, this information then being sent to a memory cell via one. Another memory cell is the relay set 35 connected to the relevant line, formed by the toroidal cores B 441, B 442 and B 443, arrives. Such a digit will generally be a total of sixteen memory cells, represented by an im- The coordinates of a memory cell in the x-copulse series. The individual pulses represent the ordinate direction and the y-coordinate direction the partial information to be collected. If they all represent their address for your query. B. as one character after each other in the z-coordinate direction. Code »two of six«, with simultaneous delivery. To enable addresses, interrogation wires are in front of- Such a form of information is particularly useful for your seen, each by in the same level of further evaluation here, since 45 three-dimensional schemes located toroidal cores can be passed on quickly and because it goes here. So goes the one leading to the contact yl A check of the correctness is possible. Before questioning wire from earth through all toroidal cores that are in the forwarding to another control device of an xz level, namely through the toroidal cores, the information can optionally be fed to the corrector ßll3, B213, 5313, S413, 5412 ... 23112, BlU UM will. In this case, the conversion 50 ... B 411. In a corresponding manner, the interrogation wire leading to the special information for the further transfer and contact yl goes from earth to provide evaluation, for example that the rest of them go through the toroidal cores B 123 ... B421. The latter digits to be expected are not in the switching ring cores, too, are all in the same system itself, but in a different switching xz level. Further each must be evaluated in the same way, namely if the ring cores lying on the xz plane go interrogation wires, the connection has to lead to another exchange. connected to contacts y3 and y4. Such a relatively simple reevaluation. By temporarily actuating one of these conks, a current pulse can also be carried out by means of linking clocks through the toroidal cores that are sent directly to the same xz plane and belong to the transfer control device. 60 den. The query wires described above correspond to other query wires, which come from subscribers, and which each go through here, among other things, via the query toroidal cores that lie in the same yz plane. Control devices for interrogating subscriber such an interrogation wire is z. B. from earth from circuits to the transfer control device through the toroidal cores B 143, B 133 ... B 111 for supplies. In doing so, they may be temporarily 65 Contact χ 1.

going in a memory cell of one for monitoring. Further such interrogation wires lead to the

serving memory of the relevant query control contacts χ 2, χ 3 and χ 4. By temporary

facility kept. Immediate supplier of the closing of one of the contacts χ 1 ... χ 4 can respectively

7 8

a current pulse through in the same jr-z plane creates a result pulse as a query result. gated toroidal cores are sent. Finally, if there is no result pulse there, interrogation wires are provided which are indicated by toroidal cores by the fact that toroidal core B 111 is already running, each of which is in the same xy plane. previously had his other state of saturation.
Such an interrogation wire goes through 5 from earth. In general, this is the interrogated one. Toroidal core, here the toroidal cores 5441, B 431 ... B 141 to the terminal of the toroidal core B 111, after querying again in ζ 13. Further corresponding query wires lead back to its previous state, to the terminals ζ 23 and ζ 33. when this is has changed when queried. Around

It should be noted that the contacts xl ... xA and to achieve this, here is, inter alia, a write yl ... y4 io provided to the wire labeled T part of the memory which are designated by the same ring cores. This part contains the devices required to control the memory cells connected to terminal ζ 13, including the interrogation wire. The writing wire is connected to the one that is used to actuate the contact ζ 1 mentioned. There are also writing wires to serve clocks. Since this is a matter of devices that are connected to the two terminals 23 and ζ 23, which, being constructed in a conventional manner, correspond to 15 connected interrogation wires. You can, if they are not shown here in detail. are connected to contacts ζ 2 and ζ 3. The terminals ζ 13, ζ 23 and ζ 33 belong to the Z-marked part of the memory. It is question wires that are attached to contacts χ 1 and yl a read-write register, which will be closed later, and which is explained by contact ζ 1. so connected write wire at the same time three equal

Before doing this, some explanations will be given about large current pulses which are so large overall that the memory shown in FIG. 2, for example, you can remagnetize a toroidal core and that can be operated wisely. It is assumed in the case of the contacts * 1 and yl that the information content of the memory cells 25 consisting of magnetic ring cores and the previously used interrogation pulses are displayed by their magnetic state. Toroidal core B 111 back to its original state. Toroidal cores are used here, which are made from iron to restore saturation. For this purpose, the contacts λ: 1, yl and zl, which have an almost rectangular magnetization curve, are to be actuated in such a way that they are stationary. The two magnetic saturation states of negative voltage effect, through which this ring cores 3 R. This not exploited other toroids stands then as its operating states 3 ° resistors. namely the toroidal cores B 112 and, B 113, by the

For interrogation of a certain ring core, the address given at the contacts xl and yl is used in the form of its coordinates in which closed interrogation wires go, wrongly with a three-dimensional scheme. With the address of a memory cell that can be remagnetized, the addresses of the 35 are of course also given via the associated toroidal cores connected to the contacts z2 and z3. The mentioned NEN writing wires a current pulse of the same strength, coordinates are now those already described, but sent in reverse polarity as over the tracing wire connected to the interrogation wires pulling contact ζ 1. arranges the 4 ° B 112 and Β 113 connected to the contacts xl .. .xA, yl ... y4. sen are. The remaining current effect that occurs there, the only wires, and in a combination that is characteristic for another third of the magnetization of this toroidal core. These three required corresponds, no disturbing effects can lie in the three levels of the scheme that cause wires. Also for the other of the intended ones, place them all perpendicular to one another. If you send 45 toroidal cores, there is no disturbing current effect. In order to interrogate two of these interrogation wires in the manner just described, if there is a need at the same time two equally large interrogation pulses, which are of such a size, with suitable polarity and strength, the total of the toroidal cores, the respective supplied pulses, any toroidal core suitable saturation state have to be brought to any desired saturation state, in the third of these three by 50 den. It then only has to have its address in the form of an interrogation wire carrying a toroid, provided that its coordinates are given. In order to be able to supply impulses be-Ringkera with the respective saturation state of any polarity at the beginning, all Konhatt, a result impulse, are induced. The considered cycle is designed as changeover contacts.
The toroidal core is magnetized here. When in the memory shown in Fig. 2, such as

Other toroidal cores, through which this third query wire already described, leads via the contacts xl and yl interrogation wire, can in no way contribute to this interrogation result pulse connected to the interrogation wires connected there, since the other two pulses are supplied, so is not only mentioned The interrogation wires do not at the same time, if necessary, also change the magnetization of the toroidal core B 111 , but go through them together. The toroidal cores B 112 and ordinates of the present address of a toroidal core 60 5113 can also be magnetized by the codes es. In the given case, the associated interrogation wires are determined so that this toroidal core can then be interrogated without further ado via interrogation that goes through there, wires also to terminals ζ 23 and ζ 33 results can be. So z. B. the toroidal core B 111 is supplied in the manner pulses. When using the previously interrogated that the interrogation method described via the contacts χ 1 and yl, one receives temporarily at the same time the interrogation result for the interrogation wires connected there at the same time, positive voltage is applied. a storage cell made up of three toroidal cores.
If the toroidal core Bill is reversed, the terminals ζ 13, ζ23 and ζ33, at which

if the query leading to terminal ζ 13, a query result occurs and the con-

9 10

bars ζ 1, z2 and z3, which are used for writing, the scheme is divided into the same parts. It does not include how the F i g. 2 shows, denoted by Z in parts B and Z of each provided device, which is a so-called read-write rectangle with a storage capacity of one bit. Represents register. This device has three intermediate connection cells Zl, Z 2 and Z 3, which are led through to the various parts. In each 5 wires, such a memory can be inserted into a query result obtained from a ring core, whereby its query result is then also kept until the evaluation of which has ended function is clearly recognizable. It can therefore be found at is. With regard to the use of this symbol, these buffer cells are also centralized in a correspondingly the toroidal cores, because they can be used for all configured circuit arrangements for an intermediate memory cell or toroidal cores. Show with io schenspeicher according to claim 1, the storage can at the same time a gain that it has several memory cells, each of the associated electrical signals connected in the same memory cell successively arriving, making the evaluation easier partial information is collected, namely with is. The help of the written in the relevant memory cell

As read-write registers, 15 known addresses can be used to supply the information

Flip-flops can be used by a creator.

The result pulse is brought into its other tilted position. Such a circuit arrangement is in the

the. At suitable points in these FIGS. 4 shown. It shows extracts from the

Flip-flops the signal control device of the control part of a switching

signals are tapped. Terminals ζ 12, ζ 22 zo l system and points of the switching system,

and ζ 32 like information or partial information attached to such locations

be. Further, by tilting such, the relay control device can be provided

Toggle circuit also the actuation of the associated and a control device to the information of

Contact, e.g. B. the contact ζ 1, are triggered. the transfer control device passed on

In cooperation with one of the contacts xl ... 25.

χ 4 and one of the contacts yl ... y4 may then belong to passing control means here the back displacement of the concerned ring core as a buffer serving information memory to its previous magnetic saturation state 4 W to the memory cells 4BW, the reader and writer consequences. The terminals ζ 11, z21 and z31 are connected to register 4 ZW, the operating device ATW and such points of the multivibrator circuits, 30 the address generator 4AW. Further, part of it that the flip-flops can also be brought about these terminals of the queuing field store 4 F and the Hilfsspeicher4if, in certain tilt positions, the adder and encoder 4 D / 4 P and which also zl connections, z2 and ζ3 loading Umwerteeinrichtung 4TJ . The meanings and which are influenced. Z 31 can therefore also be explained in more detail about the terminals ζ 11, ζ 21 and functions of these devices. Some information pertaining to the transfer control facility is also entered. gate circuits belonging to the device are shown, namely

In many cases, the memory cells of an information system are the mixing gate 4M, the AND gates4 _J Kl ... mationsspeichers, as shown in Fig. 2, 4K6, the blocking gate 4G and the link repeated cyclically one after the other on their information circuit 4 V.

query information. The addresses 40 required for this as information supplying points are hierRingder memory cells can be provided using a kernel that win to the memory cells 4BI of the address generator, the z. B. from a memory 4 / belong. With these toroidal cores, ring counting chain can consist of toggle circuits, which are, for example, B. in order to have a lot of counting positions for relay-less subscriber circuits, how addresses are needed belonging toroidal cores which, among other things, transmit the 45 dialing information to which a code converter is connected. Such a part of a slave circuit when a counter setting occurs is shown in FIG. 6 and will still provide associated address in a suitable form to be explained later. The toroidal cores are different in such a way that the coordinates of a memory cell to which subscriber circuits are here to be directly indicated. An address generator to make it easier to ask, to the memory 4 / together can also consist of two counting chains, in which 50, which is the operating device 4 TI, the one of the existing counting stages in working address generator 4AI and the read-write regilage and from which have the counting levels of one counter 4Z /. From the ring chain mentioned, the coordinates x \, xl ... and the counting stages have wires, not shown here, to the associated other counting chain with the coordinates yl, y2 ... on subscriber lines. However, one can also be assigned directly. By suitable counting 55 special interrogation control device can be provided, the counting chains then all combinations with the help of which, as has been described, information of x-coordinates and y-coordinates can be obtained, from which the required addresses are supplied by subscriber circuits or termination with. Since the circuits for lines are picked up and short-term construction of such an address generator is not temporarily buffered. The object of the invention is its presence 60 subscriber circuits and termination circuits in FIG. 2 only schematically through the bar sitting there own toroidal cores,
corner Λ indicated. There is now a memory cell of the buffer

The in F i g. 2 shown parts B, Z, T and A 4 W each only temporarily of the information

represent a functional information-supplying body, essentially for

tion memory represents the memory cells B, the read 65 the duration of the delivery of the relevant partial information

Write register Z, the operating device T and mations, and there only during one relative

has the address generator A. The short period of time of the existence of a connection in FIG. 3

showed that information to be managed via the central control part was used as a symbol in other figures.

11 12

NEN are to be transmitted and evaluated, namely in the six parts of the read-write register AZW

The address mentioned is recorded during production and installation. In the

disconnection of the connection in question, the time is then six to the right of it

The information is collected for the duration of the use of one or more parts. This

Storage cells for connection opposite to FIG. 5 collecting will now be described first.

Relatively short time for the establishment of the connection. In The in the memory cell called up

the rest of the time, these memory cells stand for the permanent address from the read-write register

other connections available. The number of 4ZW to the operating device 4 TI of the memory

Memory cells is therefore much smaller than the 4 / transferred wires leading to them. the

Number of simultaneous connections. Your 10 control unit 4 TI then calls the

The number therefore also falls below the maximum number of storage cells belonging to the memory 4 /

times of simultaneous connections. For the information content in the right-hand part of the

the latter number is the capacity of the read / write register 4 Z / is transferred. It is

different parts of the switching system. here only the one kept in a toroidal core

As a control means to transfer the 15 information content of the Weitergabe-, the weiterzugebende information by modulation device is pushed up, that the ring core either takes in the, here is the setting control pre- 4 E one or in the other magnetic saturation sight, which as the Fig. 1 is the setting state shown. What is involved here is an Instcueinrichtung £ 5, among other things, for producing formation of a bit. Serves from the relevant part of connection routes. 20 of the read-write register 4ZI , the resulting

The current information belonging to the forwarding control device is first transferred to the adding and co-adding and coding device 4 D / 4 P and wires to the di device 4 D14 P via the corresponding correcting device 4 U leading there. For this adding and coding essentially from logic circuits, such as device are also built up from the read and gate, mixing gate, etc. at the same time. For this purpose, 35 write registers 4ZW are already known in the examples given there. With the help of the information about already sensor generators4 / 4W, the memory cells 4 BW are transmitted partial information that has already arrived. It is cyclically repeated in the intermediate memory 4 W, namely when the relevant memory calls are called. In doing so, they are given over wires drawn over into the figure of the intermediate store 4 W, alternating with the aforementioned 3 °.

At the beginning of the collection, the devices are connected, so that the information content corresponds to the number of O. From the adding over these logic circuits, and coding device 4 D14 P is now based on the, whereby under certain circumstances it can be certain ver - the two pieces of information supplied to it suffer the changes. It is also provided here that the total number of dials that have already arrived is determined at the same time with this cyclical call-up of the impulses and that information is collected in the form of a code memory cell4BW, for example, according to the code "two of six", with the Linking the six circuits provided for recording information for carrying out the collective advantages of the read-write register 4ZiF over six gears are also used. They are supplied with 40 wires. From there, this code character is transmitted briefly one after the other for various pieces of information belonging to the memory cell of the intermediate information memory 4 W that have just been called up. Then it can use. The already mentioned saving of a multiple next memory cell can be called, etc.
There is a multiplication of logic circuits. The further course of the processes is now brought about. 45 pursued, which take place when the respective

In order to make it clear how the memory cell considered first is called up. If the various above-mentioned processes are actually carried out in the manner specified the next time the adding and coding input is called, direction 4 D14 P from the memory 47 that information is explained in more detail, in which a functional example is provided in which tion is supplied which indicates that in the meantime all in F i G. 4 devices shown in claim 5 ° new dial pulse has arrived, so be taken. In a corresponding manner, an additional example of other functions will be handled in this facility. The addition of the already existing number 1 for number disc pulses received previously described in the following functional example with the encountering the collection of one after the other from a number 1, which concerns the number disc pulses that have just arrived and are still to be received, to the complete, one digit one Phone number made. The resulting number 2 becomes the number dial pulse series. then as a code character after the code »two of

As already mentioned, the memory cells six «the respective six parts of the read

4BW of the intermediate memory 4 W is repeatedly fed cyclically to the write register 4ZW and from there

called. Each memory cell has a memory 60 through the operating device 4 TW in the relevant

capacity of several bits, some of which are transferred for fende memory cell. In appropriate

the address of the entity supplying the information is determined by repeatedly calling the

and some memory cells for the information to be recorded further number plates

are provided. In addition, a few bits for benimpulse have been collected until all of them are used

special purposes are provided, such as the pulses belonging to the series of dials later on

will be purified. Accordingly, that has to be taken into account. Like the end of the series

Read-write register 4ZW can also be provided with a capacity, is still later after the loading

of several bits. In the FIG. 4 left-hand writing of the F i g. 8 must be specified. Currently-

The distance between two successive calls to the same memory cell of the buffer 4 W must be so small that a dial pulse arriving in the meantime is not lost. Of course, dial pulses can be collected in several memory cells when called up.

When all the pulses belonging to a number disk pulse series have been collected, i.e. their number is fixed, the operating device 4TW of the buffer 4PF sends a signal via a special wire to the conversion device AU , which then converts the code character supplied to its input and indicating the number of number disk pulses. This revaluation can have various purposes. It can e.g. B. If it is the first digit of a phone number, it must be determined whether the other digits are to be evaluated in the switching system itself or in other exchanges. This determination is important because it determines the way in which the other digits are processed. Under certain circumstances, the urgency of forwarding this number may also depend on this. To a certain extent, the correcting device 4 U can also check the code characters supplied. If it is a code character that is not intended per se, e.g. B. a code that would correspond to the number 14, then there must be an error, because number disk pulse series with so many pulses do not occur with undisturbed operation. The correcting device therefore emits an alarm signal when such code characters are corrected, which is supplied via terminal 4ql. Through their terminals 4 q 2 and 4Q3 information will be delivered via other urgency and.

The signal supplied by the operating device 4TW is also fed to one of the inputs of the two-and-a-gates 4X1. The outputs of the two-undgate 4Kl ... 4K6 lead to the read-write register 4ZH of the auxiliary memory 4H. When the aforementioned signal is supplied, the code character supplied by the adding and coding device 4D / 4P is therefore input into the relevant parts of this read-write register. In addition, the information provided by the corrector 4 U via terminals 4q2 and 4q3 is entered there in other parts. Already mentioned several times by that signal delivered from the operating means 4TW is also the address generator 4AH the auxiliary memory started 4 H, after which the memory cells 4BH be called until a free found, after which the call is stopped and the in read-write register 4zi ? existing information is transferred to the free memory cell found.

The presence of the auxiliary memory 4 H enables the peculiarity of collected information to be taken into account when the information is passed on, provided that the processing time in the receiving device leads to the pending of information, in that the order in which it is passed on is determined by the urgency of its further processing. For this purpose, the mentioned characters supplied by the correcting device 4 U are inscribed there as indications of the urgency of information to be passed on but not yet recorded by the device in question. The setting control device 4JS is provided here as the receiving device. When it is ready to receive information to be processed by it, it reports this via a wire that leads to the passage entrance of the blocking gate 4 G, whereupon the address generator 4AH is started and first calls up the parts of the memory cells intended for the urgency messages. Accordingly, there is initially only a call for the presence of particularly urgent information. Existing urgency notices are fed to the logic circuit 4 V for evaluation via the read-write register 4 ZH , which, when a relevant urgency notice occurs, forwards a signal to the blocking input of the blocking gate 4 G ao, whereupon the address generator 4 AH is stopped and the rest of the process the just selected memory cell is accessed, so that the kept there for information read-write register 4ZH and from there via the connecting wires for adjustment controller shown arrives 4 e. If there is no particularly urgent information, when the memory cells are called up a second time, taking into account all their parts, the information content of the first memory cell found as occupied is immediately transferred to the read-write register 4ZH and from there to the setting control device 4 £.

It should be noted that in FIG. 4 only the devices required for the most important processes in the auxiliary memory 4 H are given in order not to unnecessarily impair the clarity of the figure. It should also be noted that the setting control device generally has to process more than one digit at the same time. By designing the in F i g. 4 it can also be achieved that not only one, but also several digits belonging to the same call number are collected in the buffer memory 4 W or in the auxiliary memory 4 H and at the same time transferred to the setting control device 4 E. If only relatively little storage capacity is required for the auxiliary memory, it can be useful to use transistor flip-flops instead of toroidal cores. Its functions can also be carried out using additional memory cells in the transfer control device.

As has already been explained in detail, the relevant memory cells of the intermediate memory are located Addresses of the bodies from which partial information is to be obtained. Hereinafter indicates how such addresses can be stored there. For this purpose z. B. a queue memory can be used in the requests of memory cells for to be recorded Information is entered and about the free memory cells by writing addresses assigned to the agencies providing the information. These requirements of memory cells have to be done here by reporting the addresses mentioned. The presence of a Waiting field memory also enables that when allocating free memory cells of the intermediate

15 16

store the peculiarity of different processes to be processed, that with the appropriate aids it is also taken into account with the requests that the waiting field memory 4 F itself and also with the auxiliary the order of the allocation by the urgent memory 4 H determines the availability of free memory for the requests. cells can be ascertained in order to start the transmission. 4 provided. It is carried out in memory cells, is denoted there by 4 F and has the storage device 4 TF and the signal sent by the operating device 4 TW cells 4 BF, the read-write register 4ZF, the loading to the waiting field memory 4 F Adressgene- the address generator 4 AF started, whereupon the rator4 ^ 4F. The addresses are notified him wervom called io memory cells 4 BF sequentially address generator 4 AI of the memory 4 / züge- the until one is found to be transmitted address leads. For this purpose it is first used here. In this case, similar to the auxiliary memory 4 H using addresses that are first supplied from the address generator to the presence of particularly urgent 4AI, a borrowed be queried to be transmitted addresses at suitable intervals. repeated cyclical calling of the memory cells 15 is a memory cell with a memory 4 / in question instead. If a memory cell is found for the address, the address gene is encountered in which a request is written to the rator 4AF and the address in question is, then the address used for the call is transferred from the read-write register 4ZF to the address provided for it via connecting wires, the parts of the read-write register 4ZW generator 4AI that are seen by the address are transferred to the read-write register 4ZF. From here it is then transferred to the memory that has just been called up by the ren, this read-write register and buffer 4 W from there with the help of the operating device 4 TF cell. It can then be transferred to one of the memory cells 4 BF for retrieval. That the expected partial information is used. Since, in each case, the queried memory cell of the memory 41 as indicated, this address does not only contain a request, z. B. on which just 25 memory cells of the memory 4 / can affect, the present magnetic saturation state is also due to wires that are determined by the connection of the associated toroidal core. If the handwires between the read-write register 4ZW are the toroidal core that branches off to a relayless subscriber and the operating device 4 TI , it can be indicated that they are also directed to another device these can be delivered when the handset is lifted.

The memory 4 / provided in FIG. 4 can, as subscribers have already been mentioned as a result of the above-mentioned subscribers, as a summary of the current flowing through the loop in the mentioned saturation subscriber circuits or termination circuits. for incoming or outgoing exchanges from other exchanges. It is shown in FIG. 4 also indicated that the lines leading there are considered to be 35. A waiting field memory 4 F characters for requesting a memory cell addresses can also be supplied from other locations. This is indicated by the wires connecting the address generator 4AI and the reading in cooperation with the address generator write register 4ZF by the associated operating devices. The whole facility is used to query lowing wires. A special wire leads 40 from the subscriber circuits and terminating circuit to the part of the read / write part on the far right. One of the 4ZF AbRegisters mentioned at the beginning can also be used. Urgent question control devices for querying partial information can also be registered here, for example. Subscriber circuits and termination circuits are now addresses that are used from the waiting field memory 4 F. Has been already recorded in the memory cells by such Abfragesteuerdie 45 are then transmitted to the subscriber at scarf If, later in free memory cells of the intermediate and final circuits obligations respectively via the memory 4 W device. As already described, the lines in question have arrived and are not used, their memory cells are repeatedly called up in a cyclically evaluated form with the help of addresses that are recorded by the address evaluation system and then supplied to the logic generator 4 AW. The result is 50 circuits for their evaluation and information that when called up in the relevant mation memory for receiving information memory cell there is no address of a position from which evaluation results are supplied. In this case, information is to be obtained, from which the terminating circuit only becomes the information control device 4TW at the waiting field transfer. In the opposite direction of transmission memory 4F given a signal that the Ubertra- 55 can also z. B. triggers as information to be passed on from an address. Evaluation results found for the operator control unit Abschlussingt4TW can for their part be supplied, for example, with the aid of a circuit which only serves to transfer information to the relevant parts of the read / write register to the associated lines 4ZW of the lack of mixing gates connected. Such termination circuits can also be signaled to the relevant address. For this purpose, 60 only contain relays, which are only used for information about the mixing gate 4M, which is only used in the absence of a transfer. You can then represent the already er address no signal during the cyclical mentioning of relay sets Ai and Av . Zweckruf ens delivers. The output of the mixing gate 4M is moderately the query of the termination is connected to the operating device 4 TW. switching to received information or / As a result, the absence of this signal can cause the 65 and its delivery of evaluation results in the operating device 4 TW that it fetches the previously mentioned signal so quickly that incoming information is not lost field memory 4 F sends. It should be mentioned here, go.

Interrogation control devices have already been mentioned which are used for interrogating subscriber circuits and / or are to be used to query termination circuits. In any case, can it may be expedient to have such a query control device in addition to an information memory memory cells for information assigned to the subscriber circuits or terminating circuits has an information memory with memory cells in which among other things, addresses of subscriber circuits or termination circuits are kept so that with the help of which subscriber circuits or terminating circuits can be queried in a targeted manner. In this way it is achieved that a perfect distinction between characters for the request of memory cells and information arriving afterwards.

In Fig. 5 shows an example of a polling controller in which the two different Information stores exist. It is used to query subscriber circuits or termination circuits, the z. B. are constructed as shown in FIG. 6 shows. The different characteristics and functions of this polling controller will now be explained in detail.

The subscriber circuits or termination circuits to be queried are represented by the memory cells 5BS. They have the common read register 5ZS. There is a storage capacity of one bit in each case. The associated operating device is labeled 5TS. The first information memory of the interrogation control device has the memory cells 5 BF with the read-write register 5ZF. Here, too, there is a storage capacity of one bit in each case. This also includes the operating device 5 TF. The memory cells 5BS and 5BF are assigned to one another in pairs here. Those belonging to the same pair are called at the same time. The common address generator 5 AF is therefore assigned to all of these memory cells. The memory cells 5BF are used to indicate the occupancy status of the assigned lines. The memory to which they belong is therefore referred to below as the free-busy memory. The second information memory has the memory cells 5BU with the common read-write register 5ZU. This also includes the operating device 5 TU and the address generator 5 AU. Addresses of lines which are to be monitored for incoming information are recorded in the memory cells. This information memory is therefore referred to below as a monitoring memory. Moreover, even 5 H available to the memory cell 5BH the auxiliary memory is involved in the transfer of addresses by the address generator 5 for AF read-write register 5Zu. The monitoring memory 5 U may also temporarily store partial information, for which special parts of the memory cells are provided. It can also be used in an expedient manner for additional tasks, for which purpose further special parts of the memory cells 5 BU and of the read-write register 5ZU are provided. The adding and coding device 5D / 5P is also used in this connection. Various logic circuits are also provided, which are mentioned in detail in the description of the functions. The switching device 5 Q enables the address generators 5AF and 5AU to work alternately in an expedient manner so that no mutual interference occurs when the two information memories 5 F and 5 U are in operation.

This operation will now be described. May it

the address generator 5 AF call the memory cells served by it in pairs. Let it be

ίο assumed that initially all monitored lines are not in use. Accordingly, all of the memory cells 5 BS and 5BF initially have the same state. The information resulting from each call has a binary value of 0 here.

The associated signals are each fed to the inputs of the blocking gate 5 G1. His Durchlaßeingang is to read register 5Zs and his blocking input is connected to the read-write registers 5ZF. According to its function it provides only an output signal when a signal having the binary value L and from the read-write register 5ZF a signal is supplied with the binary value 0 from the read register 5Zs. This is the case when the memory cells are called which are assigned to a line that has just been newly assigned. Belonging to the respective subscriber line circuit or termination circuit memory cell then delivers the read register 5Zs in retrieving information with the binary value L, while the associated memory cell of the free-busy memory 5 F via the read-write register 5ZF still information with returns the binary value 0. At the output of the blocking gate 5G1, a signal is now received which, among other things, reaches the read-write register 5ZF. This causes the information present there to receive its other binary value in the memory cell of the memory 5F which has just been called up, so that information with the binary value L is written there. In addition, the signal supplied by the blocking gate 5Gl reaches the undgates 5Kl ... 5K6. The address just supplied by the address generator 5 AF is therefore forwarded to the auxiliary memory 5 H via these AND gates, where it is temporarily recorded. It should be noted that in the auxiliary memory 5 H only one address can be added. As soon as this has happened, a block (not shown) is activated until it is picked up, which prevents further addresses from being forwarded.

The address generator 5 AU is then started by the switching device 5 β at the specified time. It then delivers the addresses of the memory cells 5BU of the monitoring memory 5U one after the other, as a result of which these are called up. In these memory cells, parts are provided which in turn have to receive addresses of subscriber circuits and terminating circuits which are occupied. With the help of these addresses, these subscriber circuits and terminating circuits are then queried for incoming information in an addressed manner. In addition, the memory cells have parts for temporarily receiving information that has arrived and for special purposes that will be explained later.

If a memory cell is encountered during the call that is not an address of a subscriber circuit or final circuit, then given

509 538/106

if an address in the auxiliary memory 5 H is transferred to the memory cell just called up. In the case of the operating case described here, it was assumed that no subscriber circuit or terminating circuit has yet been assigned. The first memory cell called up in the memory 5 U therefore does not have an address. The operating device 5 TU therefore sends a signal to the auxiliary memory SH which causes the address stored there to be transferred to the read-write register SZU and causes this address in the auxiliary memory SH to be deleted. The transferred address is then transferred to the memory cell called up.

The processes will now be described which take place when a memory cell is repeatedly called up in the monitoring memory 5 U which already contains an address. This address is transferred to the read-write register 5ZU when it is called. From there it reaches the operating devices 5TS and STF via connecting wires, with the aid of which the associated subscriber circuit or termination circuit and the memory cell of the free-occupied memory 5 F assigned to it are queried. Information with the binary value L is supplied from the memory cell of the free-occupied memory 5 F. Information with the binary value 0 or L can be supplied by the queried subscriber circuit or termination circuit, depending on whether the associated subscriber has already started dialing the number or not, or depending on whether a loop is being opened or while dialing the number Closure is present. The query results do not result in any changes to the content of the assigned memory cells in the memory 5 F , since in any case the blocking input of the blocking gate 5 G1 is supplied with a signal by which this blocking gate is blocked. The memory cell of the monitoring memory 5 U considered here is called up periodically at certain intervals. These distances result from the fact that the address generator 5 AU is repeatedly started by the reversing device 5 Q for the one-time delivery of all addresses. As already mentioned, these distances must be so short that no dial pulses that may arrive remain undetected.

The processes are now dealt with in detail which take place when a number disk pulse series supplied by the relevant subscriber arrives. In general, the subscriber will only start dialing a number after some queries have taken place, since the query is fairly quick. In the first queries the subscriber loop is then still be closed, so it was initially results in retrieving information with a binary value L, whereupon a signal from the unlocked locking gate 5 Gl to the read-write register 5Zu passes over it in the accessed memory cell of the monitoring memory 5 U is stored. As long as the binary value L continues to be obtained when this memory cell is called up when the relevant subscriber circuit or terminating circuit is queried, the present information is retained in the relevant memory cell of the monitoring memory 5 U. It should be noted that in this case no signals are passed on via the inverter circuit 5 /. This inverter circuit namely changes the binary value of information that is obtained when interrogated. As long as the interrogated subscriber loop is closed, no signal is passed on from the output of this inverter circuit 5 /.

However, this is the case as soon as the subscriber loop is opened while the number disk pulse series is running. Then the inverter circuit 5 / passes on a signal. This arrives at the operating device 5 TU and has the consequence that the selection information stored in the called up memory cell of the monitoring memory 5 U is deleted. At the same time, it can be passed on as a special signal via a line 5 / outgoing from the relevant part of the read / write register 5ZU, if so desired. In addition, that supplied by the inverter circuit 5 / is passed

ao signal to the adding and coding device 5 D / 5 P, which then sends a code character corresponding to the number 1 to the designated parts of the read-write register SZU , from where it is transferred to the memory cell called up.

The next time the relevant memory cell of the monitoring memory 5 U is called up, the monitored line loop will still be open. A signal is therefore again supplied to the adding and coding device 5D / 5P via the inverter circuit 5 /. In addition, the code character previously entered by it in the relevant memory cell, which corresponds to the number 1, is supplied here. By means of an adding and coding process, it is now converted into a code character corresponding to the number 2, which is then fed to the relevant memory cell via the read-write register 5ZU. If the present loop opening is the one between two number disk pulses, it is relatively short so that at most only a few queries of the line loop can take place, e.g. B. five queries. If the line loop is still open after five queries, the subscriber has obviously hung up, whereupon special processes are to be carried out. However, this may not be the case now. Therefore, there may only be four queries when the line loop is open. The adding-coding device only counts up to 4. As soon as a closed line loop is encountered during the interrogation, a signal is delivered via the blocking gate 5G1 as at the beginning of the processes already described. This signal has the read-write register 5Zu the storage of the binary value L in the relevant part of the retrieved memory cell of the memory 5 U monitoring result. In addition, this signal is also fed to the adding and coding device 5 D / 5 P , which causes this device to be reset to the number 0, which also entails a corresponding entry in the read-write register 5ZU and the memory cell called up there Consequence. If the queried line loop is now opened again, the processes already described for its first opening are repeated. In this way, any number of dial pulses can be recorded and output.

21 22

If it turns out that while the information available from there is being opened with the aid of the address-requested line loop, at least up to 6 of the relevant memory cells are counted by the, then it is not a question of the device that was waiting to be opened. This Einrichrend a number disk pulse series, but device is generally through the passing on the opening as a result of the subscriber hanging up. In 5 control device shown. In this case, the query of the relevant line delivery of this information is to be aborted immediately at the line loop. Monitoring for the occurrence of this event is carried out via the AND gate 5K7 of its determination, as it was initially described. The addresses of the memory cells of the overdrive case are made. The AND gate 5 K 7 is monitoring memory 5 U, which is queried for information from its inputs to two of the three wires connected to the transfer control device, via the code characters from the adder and via the coding device SD / 5 P wires 5 η leading to the read-write register 5 TU .
SZU are transmitted which correspond to the number of queries already mentioned below during the opening of the line loop relating to the construction of subscriber circuits. If the 15 and termination circuits explained in more detail. The F i g. 6 code characters are formed according to the binary code, so shows, among other things, as far as it is of interest here, the number 6 is present if the two code characters - the partial elements without a relay in question have the binary value L, which the operator circuit belonging parts that have values 2 and 4. These two code character speech wires 6 a and 6 b are connected. Remark elements are then signaled to the AND gate SKI - except for the line transformer 6 and siert. When the respective separating capacitor 6 K is applied, it emits a signal from all of the toroidal core subscribers, which is sent to the operating unit 6 M, via the two windings of which the power is supplied to the direction 5 TU , and takes place in the subscriber loop. By lifting the memory cell just called up, the deletion of the handset (not shown) by the address available to the subscriber and the other information, the subscriber loop is closed, so that mations result. The mentioned signal is a loop current flows and the toroidal core 6 M in the operating device 5 TF of the free-Be brought to a very specific saturation state sets memory SF for deleting the information and is held in this state. If the content of the memory cell just called is missing, however, the loop current is not carried in it. As a result, their content is retained at the new saturation state. Is only adapted to it when the associated subscriber circuit is in the operating state of interrogation via interrogation windings (not shown) for each or termination circuit. because a magnetic reversal in a suitable direction

It can be supplied in the manner and strength described above, so this provides different behavior in the occupied state and in the idle state or termination circuits without further changes in several subscriber circuits. Instead of the toroidal core without mutual interference occurring. 6 M , the relay 6 A shown in dashed lines can also be provided. It carries the normally open contact 6 α 1, which is two information memories, namely the one which results in memory 5 U in the interrogation control device when interrogating instead of the interrogation winding-free-occupied memory 5F and the monitoring system of the toroidal core 6M. It then flows, depending on the operating mode at hand, that the query sequence for the detection of the state of the subscriber circuit is a stream or no subscribers who have just picked up, unabated. This effect can then be exploited without being particularly dependent on the query sequence of subscribers, difficulties in setting the device 5 ZS that has already lifted off here as reading and information register. The number of the latter participants is in all. Because of the subscribers delivered by the address generator SA F that are substantially smaller than those of the subscribers to be detected or interrogated by the operating device 5 TS solution, the addresses supplied are then all subscribers instead of here. Since the two in-toroidal cores are the working contacts of the relays belonging to the differing memory SF and 5 U alternately working 50 which subscriber circuits, a suitable query sequence can be controlled and queried in each case.

undertake, with the query sequence, for the Ab- In the F i g. 6 is also denoted by 6 c

ask by the monitoring memory 5 U shown shorter line wire, which serves as a test wire and

than the other query sequence. Appropriately to which the occupancy relay 6 C is connected. the

are connected to all three wires by the free-busy memory SF after 55

the respective starting of the associated address elements form a terminating circuit for a line

generator 5 AF only some of the storage cells with incoming traffic. She is also in

called. Then a pause is inserted, in which, in the manner described here, incoming information

the memory cells of the monitoring memory 5 can be queried. In any case, the function shown in FIG. 6th

be called. Calling the memory cells 60 shown only to transfer the

the two different information stores can receive incoming information via the associated line.

if necessary also in an even more complicated way.

offset from one another and interconnected in a manner similar to how information from

are, with the switching device 5 Q, the final circuits are included, are at

has to make the associated switchovers. 65 the present switching system in question

During the period of time during which the information to be passed on

cells of the free-busy memory 5F are called up and supplied to the relevant terminating circuits. The

the, can also from the monitoring memory 5 U meets essentially terminating circuits for line

services with outgoing traffic, which z. B. in others Conversations to be evaluated election information are to be supplied. If the address is such Terminating circuit or that of the associated line is present, the terminating circuit in the same way as when querying the delivery of information. Here can z. B. each have an associated relay to respond or to drop out. With help of a contact, this relay can then transmit signals over the line with outgoing traffic. If the information to be passed on is delivered broken down into short impulses, it is useful to to use a relay that can be triggered by short impulses can and at the same time has self-holding properties, such as B. so-called Ferreed relays. Such operating conditions can also be complied with with the help of upstream electronic flip-flops will.

In FIG. 7 shows an example of a termination circuit for a line with outgoing traffic. The line transformer 7 T and the isolating capacitor 7 K are located between the line cores la and 7 b, which are the speech cores here. Furthermore, the through-connection contacts 7vl and 7v2 are provided, as well as the pulse contact 7 /, via which signals are transmitted to the line when the through-connection contacts 7ν 1 and 7v2 are in the working position. The associated relays are called 7 V and 71. The occupancy relay 7 U is connected to the line wire 7c serving as a test wire. The pulse relay 7 / can be put into operation by current pulses that are distributed with the aid of the address mentioned, whereby signals in the form of more or less long pulses or series of pulses are passed on via the line. The pulse relay 7 / is only used to transfer information.

The information to be passed on is primarily information that comes into consideration via the transfer control device to be delivered. With the help of logic circuits, special associated evaluation results are also obtained there, as already with reference to FIG. 4 has been described. If necessary, these evaluation results also influences the dissemination of the associated information, ζ. Β. through consideration Urgency messages received. However, this influence can also take place in other ways. So is z. B. possibly required, according to the length of time determined during the evaluation of a character that represents information and is to be passed on to influence the duration of the dissemination. This is expediently done by counting the periodic calls of the relevant Storage cell. For this purpose, in the memory cells with the help of all memory cells common Logic circuits each entered notes about calls that have already been made and with the specified number of calls are compared until this last number is reached, thus counting is finished. The mentioned evaluation of information in the forwarding control device in each case can either be done before storage. But it can also only be saved after it has been saved when the information is passed on. The same applies to transformations of the information z. B. by changing the code used.

The F i g. 8 shows an example of a circuit arrangement in which the aids required to determine the temporal length of characters are provided. The associated measures will now be explained in detail with reference to the description of this circuit arrangement. This circuit arrangement initially has the information memory 8 W , the mode of operation of which is that of the intermediate memory 4 W in the circuit arrangement according to FIG. 4 corresponds. It can therefore also be viewed as belonging to the transfer control device WG. The information memory 8 W has the memory cells 8BW which are controlled by the operating device 8 TW and the address generator 8 AW . He also has the read-write register 8ZW with the parts a, b ... z. A character, which has either the binary value O or L , can be entered or output for each part. The parts af serve to include the address of the body from which information is to be obtained. The information obtained is then included in parts g ... I.

From there they are fed to the evaluation device 8 / for evaluation, reshaping, etc., among other things. Resulting evaluation results are fed to the parts m and u ... χ . The parts η ... s are connected to the counting device 8 L, which is used to count the periodic calls to the same memory cell. Their function largely corresponds to the adding and coding devices already described. A special character is entered into part t of the read / write register 8ZW in the course of counting. The remaining parts of the read / write register are available for other purposes.

If necessary, the addresses of the places to which the relevant information is to be passed on are entered in the parts u ... χ already mentioned. The positions that come into question here are arranged like the memory cells of a memory and are denoted by 8BA. They are controlled by the operating device 8 TA , with the distribution of the information to be supplied being carried out at the same time. It can, for. B. here also those relays are made to respond and to drop out, which belong to the positions in question.

In the wiring between the devices already mentioned, some logic circuits, namely und gates, blocking gates and mixing gates, are inserted, the function of which is explained in the description of the operation of the entire arrangement. By evaluating the in parts g ... I Information stationary when calling a memory cell of said information memory 8 W may now that in the portion m be entered into character which specifies the nature of the further information to be displayed, and u in the parts ... χ entered address of the location to which to pass the information is, have surrendered. It may be a termination circuit for a line with outgoing traffic, as it is, for. B. in FIG. 7 is shown. The information to be passed on may e.g. B. be a so-called flicker termination sign, which is to be applied to one of the two speech lines. This flicker termination sign consists of

25 26

other consecutive 1 pulses, each closed for 150 msec, the binary code character elements with the

and between which a pause of 2 ° = 1 and 2 ³ = 8 should be included

475 msec in length. to have. After the counter counted to 9

Has the repeated cyclical access the storage, the next calling of the memory cell have cherzellen8BPF with the help of the address register 5, the present here Binärkodezeichenelemente 8AW the supplied addresses, the memory binary value L. This has the consequence will be that the Auszelle, in the These evaluation results were previously entered via the transition of the AND gate SKI, a signal to block the read-write register 8ZW, the blocking gate 8G is supplied, which continues to be called periodically at fixed intervals. Blocking input reached via mixer 8M2. When these calls are now made, the io This signal also reaches the mixer 8Ml through the parts u ... χ of the read-write to part t of the read-write register % ZW and register 8ZW is due Address entered there as a sign for the further blocking of the blocked position, the flickering end signal output 8G, so that it can also be delivered later at. This delivery has to take place in repetition of the following calls of the relevant memory length until there is a special sign to the cell from here to the blocking input of the blocking gate termination of the delivery. 8 G, also via the mixer 8 M 2

Now has the time interval with which the is delivered. After the corresponding memory cell is periodically called up to the number 9, nothing takes place in the subsequent calls with the flicker to be supplied - no further extension of the pulse length and pause - termination circuit supplied via the triggered end signal. Do the count length. These time lengths can, however, continue to count towards 8L with each further call by counting the periodic calls.

Accurate memory cell can be obtained. To do this, when the number is over 37, the has to

the counting device 8 L and the linked pause for the next pulse are used.

fung circuits 8Kl, 8K2, 8 G, 8Ml and 8 M2. 25 written length reached. The and- gate is 8K2

The periodic calling of the same memory cells with its three inputs to the connecting wires

takes place in this information memory, for example, between the counter 8 L and the

a time interval of 17 msec. If η ... s

for the first time the address of the controlled location is connected to that of the read / write register 8ZPF, which

Divide u ... χ and the sign for the delivery of the ³ ° depart from the parts, the binary code character elements

Flicker closing sign in part m of the reading element with the place values 2 ° = 1, 2 ² = 4 and

Write register 8ZW is present, the delivery 2 ⁵ = 32 begins. When the counter

tion of the flicker stop sign. To do this, the three of you have counted up to 37 with the help of direction

the address the terminating circuit in question by supplied binary code character elements the binary

the operating device 8 TA is controlled. Outside ³⁵ value L. As a result, from the output of

which is from Teilm of the read-write register and gate 8 ^ 2 a signal to the counter

8ZW is supplied from via the unlocked locking gate 8 G 8L , which then causes

a signal to the relevant terminating circuit instead of the next higher number is now again the

sends, which there the delivery of a pulse number 1 in the read-write register 8 ZW .

triggers. 40 will give. In addition, this signal will also be the

The point in time at which the blocking part t of the read / write register 8ZW is blocked via the garters 8G will still be specified. Mixing gate 8ml supplied, whereby the front-Vom m part there, the counter forth also is cranked character entered for the blocking of the blocking-8 L, which are now taking place Views gatters8G is changed, so that then a same memory cell counts. With the present 45 blocking of the locking gate 8 G no longer takes place. When the call is called, the number 1 is accordingly restored. This restores the state that prevailed for certain codes in the parts η ... s of the start of reading / writing of the first pulses supplied. There register 8ZW and from there into the called one is therefore now entered when the memory cell in question is called. Memory cell again a pulse in the same way

The next time this memory cell is called up, 50 is over the terminated circuit, as before

again the same terminating circuit as previously delivered, to which then again the associated one

controls and there via the locking gate 8 G again pause follows. This is then repeated again

a signal is delivered through which the previous Lie etc.

The impulse continues to be fed until the next time. It is based on the information that controls are extended. A pulse length of 55 with the aid of the parts a ... f of the read-write of 34 msec is thus achieved. In addition, with the help of the register 8ZPF, the respective standing address is obtained. Counting device 8 L, which is previously called into the number 1 entered in the number 2 so that the delivery of the flicker termination character is to be aborted by the evaluation device. For example, code characters according to device 8 / the character in the part (s) of the binary code may be used. In the corresponding 60 changes, whereupon the lock gate 8 G and the counting mode, the memory cell in question is still no longer fed to the direction 8 L signal. Called up several times, whereby the delivery after arriving also to the relevant final scarf pulse is extended by 17 msec and the device no longer signals. The delivery of the flickering stored number is increased by the number 1. The final sign is thus broken off.
When the number 9 is reached, the 65 to be supplied has. Now the undulation is also in a different way than the above-described Beschriegatter8üCl with its two inputs to which both can be supplied by signals. In this way, the parts of the read / write register 8ZPF can be displayed. B. also at the beginning of the break between im-

27 28

pulse, a special switch-off signal can be used for the route. Is it from

relays to be controlled are supplied. For this purpose, a participant in the switching system is selected here

the AND gate 8K3 provided that a signal then digits that are used in other exchanges for production

if it is to use the part m of the read-write of connection paths, so are

Register SZW and from the AND gate SKI a 5 which they lead to connection circuits with there-

Signal is supplied. This is done in each case to the lines passed. Most of the time it will

the first time, when the counting device 8 L to 9 counted, the traffic

would have. to determine the direction to take.

It should also be noted that the counting of the To make this possible, the initial digits periodic calls also in a different way than in front of the 10 relevant phone number that is required for this described can be carried out. In the, first in another information store essentials were collected there up to one fixed up to their use, and only then put number by adding the successive after determining the direction of traffic over the The number of calls to the same memory cells are counted. Transfer control device passed. The BeStatt this can also affect the direction of traffic from the outset Memory cell the specified number of gears, as you can already call from an example was entered in the form of a code character.

and then with each call with the help of the previous determination of the traffic direction

A suitable counter pre-subtraction also enables the characters to be passed on

be taken until the number 0 results. Also on 20 through implementation in the transfer control device

in this way the lengths of pulses and the nature of the exchange can be adapted

the required breaks can be determined. can who has to receive the characters. It

With the help of these various measures this can be done, for. B. a number disk impulse series NEN also the lengths of impulses with their corresponding pauses converted into a code character "two of five" are determined, which are determined in the case of the willow, namely when the relevant switching distribution control device WG or by other processing only for Receipt of voting characters in these control devices, in particular by an Ab-Form is set up. Such an implementation is to be included question control device. The counting of the periodic calls during the period of impulses to be transmitted around the characters to be transmitted in the prescribed duration of pulses then also provides a criterion 30 to pass on the form, which is particularly important in long-distance traffic. Otherwise, the lines can be saved as to whether there are devices to be assigned individually in the course of number dials for character pulse series when dialing numbers through a partial conversion, by adding a number dial pulse or by a very advantageous saving in effort, a significantly longer loop is achieved.

Closure acts that lie between two numbers- 35 are expediently used to collect series of disk pulses. If information memory is also used in the case of the digits, the counting to the other, that it is a matter of such a loop, control devices that are already present, then the number corresponds to each. For example, it is advisable to use the number disk received up to then for the connection monitoring device VU to include a digit of the dialed number. Use SVU if there is 40 running information store. This dialing information can then be used to collect digits that are passed on to the switching system for further evaluation, etc., within the switching system itself. In this way, for. B. is also used in the in, it is very convenient to use a query F i g. The circuit arrangement shown in FIG. 4 is used as a control device for terminating circuits from Leiden. In this case, the peculiarity of a signal, expressed by the length of the time it belongs to the incoming traffic, is used to use the information memory. With the help of the incoming information, by counting this information memory, the dialing information or subscriber circuit arriving via the periodic calls of the relevant terminating circuits can also be determined. mations are collected. After a digit at 50 received, if applicable, is dialing information that has been passed by subscribers to another facility, the rer exchanges come from.

The relevant memory cell of the forwarding control device should also be noted that one can also provide direction WG in general afterwards for any that the forwarding is ready for other incoming partial information in a memory cell. There control device WG more than one digit of a call depends on the operating case at hand, at which number 55 can occur. This is then the case, which other device the number in question if you both from a participant the last is passed on. Digits of a phone number and in between also the

Is it a matter of digits that have previously been collected from a part and from an information

subscribers of the switching system are selected and store temporarily stored initial digits

which are passed on for switching processes within the switching 60 for passing on to other switching operations

system itself are to be used. The passing on of these digits can in general in each case common to a different information store, rather than being done arbitrarily quickly in which it can only be used at such a speed will. The goal of the speech path network that in the other exchanges in their • the connection to be established by the switching system. 65 Recording and processing no lack of time is only certain when the call is made. Compliance with time conditions in the "number is complete. Only then can digits be passed on, especially if they are in far away from the production of the desired connection form of number disk pulse series occur,

29 30

In a similar way to the waiting times already described and the subsequent determination of time spans by counting lost connections, no noticeable periodic calls of the relevant memory can cause impairment of the traffic, ie cell can be achieved. z. B. do not exceed 1% o of all connections. Instead of waiting in each case until all of the incoming connections are appropriately received, even if the number to be passed on is lost, the transfer control device WG up to in the form of number disk pulse series can be sent to its obtain clearance, the connection circuits for leadership to other exchanges forderndem participants busy signal is given in which, carrying lines, even if the requesting party, the processing WG be the Weitergabesteuereinrich- io not already started before all the desired compound is obtained, so he gets then associated impulses on their part in the forwarding - but by this measure the busy signal, so control device have arrived. This avoids unnecessary waiting on the part of the subscriber if none of the memory cell in question is known. Of course, this operating case only occurs in a very seldom associated digit that is currently being recorded. Waiting times that occur can be measured by an earlier release of the memory cell than usual, so that the periodic calls are possible. As a result, the period of time for which the respective information or partial information supply memory cell is used is reduced. The number of storage cells that take place are counted. On the whole, it then follows that some have to be before they can begin with their delivery. Storage cells can be saved. This gives information about the work done, but it must not start too early, so the switching system is wise and, if relatively long waiting times occur when a series of number dials arrives, a particularly slow number remedy can be provided.

switches and their forwarding with correct speed. The examples already described above do not occur in which the forwarding of information about the transmission of impulses to the arrival of impulses threatens to have various advantages over the delivery control device WG. It is therefore in any case to wait until a certain minimum number of operations, such as the recording of election information transmission, the delivery of special election characters, etc. of pulses, e.g. B. four pulses, already arrived. It has also been shown how different times are. If it is a number disc, the conditions can be met. It should be a pulse series with less than four pulses, so it can be seen that the activity of the transfer started when the end of the series transfer control device was established in cooperation with. the other control devices all the necessary ver. B. can be handled by an averaging process, so when the fifth pulse is received the resulting 35 remote the required logic circuits characters are triggered. and in the case of each of the pulses to be used, the transmitted pulses are then counted in the special storage cells of the storage capacitors required for this. After the last impulse has been provided at the bed.

As has already been described, the numbers of incoming and forwarded Im- 40 Information memory SVU of the connection overpulses are continuously compared with one another. If this monitoring device VU is, among other things, the same as the numbers, then the forwarding control device WG hears dialing information. After that, the memory cell is passed on in the form of digits of call numbers, released and is available for the inclusion of other information. In addition, this information memory has the information ready. 45 addresses of sections of the route that are in the speech path-expediently, the release of a network K takes place and the existing connections to the memory cell are not to be stored immediately, but only after the previous one. This information can then be used when separating the written minimum pause, which is to be observed for the distance connections and the associated vacancy between number disk pulse series. Namely, a memory cell can be used for the same 50 to change the information about the occupancy calling subscriber very shortly after the status of sections of the route that are stored in the release of the previously used memory cell information memory SES of the setting control device. It can then happen that the device ES are kept. This then takes place again with a series of number disk pulses further to the use of the transfer control device WG.
The information about the existing connection may then be passed on too early. routes are stored in several storages. The above-described measures, namely these memories, also include the premature forwarding and the delay memories SVU of the connection monitoring device, even when memory VU is used, memories 521 and S22 of the subscriber cells in connection with the forwarding 60 subscriber interrogation control device 2Ml and TAl. Information other than digits from phone numbers There, the addresses of participants must also be applied. As stated earlier, the number of outbound traffic is stored. In addition, memory cells belongs to the passing control means to do the memory of the SLA Abfragesteuer- WG substantially smaller than the number of simultaneously device LA to query completion scarf maximum of existing connections, the obligations on the 65th Here, among other things, the addresses of the voice path network K belonging to the switching system of terminating circuits are stored over which they are routed. However, there are so many memory cells in front of which connections are made. It is useful to see that the lack of free memory cells now memory cells of information stores that

Have to keep information about the same connection path, arranged there in such a way that they can all be called up with addresses linked according to a fixed rule. In the simplest In the case of this rule, the addresses of the relevant memory cells are in each case the same. It is then relatively easy to call up all of these memory cells. In these memory cells that form the connection path keep the relevant information, then all of the relevant information Addresses indicating the connection path are stored, namely the addresses from its beginning and its end, and from intervening stretches of road.

It should also be noted that it is also possible to have different information stores through one of them common control device for reading, changing and writing information in memory cells to use. This is particularly useful when in the various memories Memory cells are to be called, the addresses of which are related according to a fixed rule.

In many cases it is desirable that the subscribers of a switching system can be connected to the speech path network as desired regardless of their subscriber number. Then a participant can keep his participant number without any particular difficulties despite a change of location. In order to make this possible, the already mentioned information memory SUM operated by a control device UM is provided. It serves as a converter to determine the connection position of a subscriber from his phone number. If the connection position changes, a corresponding change is to be provided in the information memory SUM so that the new connection position results in the event of an inquiry with the call number that has remained the same. The information memory SUM is expediently designed in such a way that it also supplies information about peculiarities of the subscriber connections, such as modesty, order service, blocking of the subscriber connection, etc.

As already described in detail, the central control part is divided into several control devices, each of which has information memory. Generally speaking, the information to be stored in the various information stores differs in various ways. First of all, there are differences in the retention period. Information is stored in memory cells of the transfer control device for the shortest possible time, namely only until partial information that belongs together, such as dial pulses, has been collected. Information is stored in the information memory SVU of the connection monitoring device VU for much longer, namely as long as there is a connection. Information is kept even longer in the information memory SUM of the converter UM , namely e.g. B. as long as a participant maintains his connection position on the speech network. In addition to the differences already shown, there are also differences that affect access to the information. So it can be B. suffice to read the individual information stored in a memory cyclically one after the other and to process them accordingly one after the other. This is the case, among other things, with regard to the connection numbers assigned to subscribers and stored as their addresses, which are used for particularly frequent interrogation of subscriber circuits. They are stored in the memories 521 and 522 of the subscriber interrogation control devices TA 1 and TA 2 . In other cases, a lot of information must be taken into account in a relatively short time for the relevant switching process, which is why special

ίο procedures are to be used for this. This applies e.g. B. for the information stored in the information memory SES of the setting control device ES. In the route search to be carried out there, if necessary, z. B. when using a multi-level switching network as a speech route network, the operating states of many sections of the route can be taken into account in a short time. This is necessary so that the time span required for the route search does not become too long. The retention period for the information and access to the information are characteristics that can be summarized under the general term »availability«. The availability of stored information can accordingly differ in terms of their retention period and the access time. The division of the central control part into control devices with information stores is obviously largely determined here by the availability of the various pieces of information to be stored.

This structure has now been supplemented in a certain respect from a further point of view. If it is a switching system with a large number of subscribers, it is expedient to divide the control devices with information memories for information about the operating status of subscriber circuits additionally according to a division of the subscribers into groups. This is also provided in the switching system shown in FIG. 1, in which the two control devices TA 1 and TA 2 are provided for interrogating subscribers who each serve a group of all subscribers present. This additional structure makes it easier to query the subscribers in good time to search for connection requests. In addition, if the number of participants has increased significantly over time, an additional query control device can be provided, which could initially be saved. This additional structure allows you to adapt to the number of participants.

So far it has been stated that the switching system has a voice path network, but no further details have been given about this voice path network. This has to do with the fact that the control part described in detail is suitable for operating any built-up speech path networks. B. a spatial path multiple can be used as a speech network, in the form of a switching network with several switching stages. In this case, the setting control device ES is used for searching, selecting and establishing, as well as for separating connection paths. The associated information memory SES then has memory cells which are assigned to the intermediate lines of the switching matrix representing the spatial route multiple and in which information about the

Operating condition of these intermediate lines are kept. However, it is also possible to use multiple paths over time as a speech path network. In this case, connection paths are z. B. brought about that the information about connections to be established or disconnected are supplied to the setting control device ES belonging circular memory from the central control part, which in a known manner with the help of distribution circuits for the duration of the connection in question, the connecting participants associated connection switch with a Control your heart rate.

Claims (42)

Patent claims: 1. Circuit arrangement for centrally controlled switching systems, in particular for telephone purposes, in which information about the operating status of the various associated switching devices is centrally stored, characterized in that the voice path network (K) is separated from the speech path network (K) and is divided into several with information memories (511, 521, 512, 522, SWG, SES, SVU, SLA, SUM) equipped control devices (TAl, TA2, WG, VU, LA, as UM) structured control part has a central transfer control device (PFG), which through information exchange with other control devices in its buffer (5PFG) collects partial information arriving one after the other with several memory cells in the same memory cell belonging to the same information supplied by a subscriber or a particular memory cell representing them with regard to the delivery of information, including a memory cell of the intermediate memory (SWG) only temporarily by one writing the address of the point supplying the information is assigned so that the number of memory cells in the buffer (SWG) falls below the maximum number of simultaneous connections, and that the information or partial information in the forwarding control device (PFG) is checked and acknowledged and for their transmission and the subsequent evaluation are transformed and that they are revaluated if necessary. 2. Circuit arrangement according to claim 1, characterized in that in the interaction of the transfer control device (PFG or 4 W) with other control devices, several collection processes are handled simultaneously, with fast-working logic circuits (4DI4P, 4U, required for recording, converting and converting information) 4K1 ... 4K6, 4M) repeatedly, cyclically, one after the other, each briefly used for the partial information belonging to different information, so that a multiplication of the logic circuits (4Dl4P, 4U, 4Kl ... 4K6, 4M) is saved. 3. Circuit arrangement according to claim 2, characterized in that the memory cells of the forwarding control device (WG ) combined to form the intermediate memory (5PFG or 4PF) are supplemented by a waiting field memory (W or 4F) , are entered in the requirements of memory cells for information to be recorded and via which free memory cells are allocated by writing addresses of the locations providing the information. 4. Circuit arrangement according to claim 3, characterized in that during the allocation free memory cells take into account the nature of the various requirements to be processed that the order of allocation is determined by the urgency of the requirements will. 5. Circuit arrangement according to one of the preceding claims, characterized in that that when forwarding the nature of the information collected, provided the processing time leads to information waiting in the receiving institution, thereby taken into account that the order of their forwarding is determined by the urgency of their further processing. 6. A circuit arrangement according to claim 5, characterized in that a special auxiliary memory (4H) is provided to take into account the order in which it is passed on, in which information about the urgency to be passed on, but not yet recorded by the device concerned, is written. 7. Circuit arrangement according to one of the preceding claims, characterized in that that the division of the central control part in control devices with information stores in accordance with the requirements for the availability of the information to be retained has been made, with particular reference to the information pertaining to the information Retention period and access time. 8. Circuit arrangement according to one of the preceding claims, characterized in that an interrogation control device (TA 1) with information memories (511, 521) for information about the operating state of subscriber circuits (Tsa ...) is provided and that in the presence of a large number of subscribers this query control device is divided into several query control devices (TAl, TA2) according to a division of the participants into groups. 9. Circuit arrangement according to one of the preceding claims, characterized in that the request for memory cells is triggered by request characters which are generated by interrogation control devices (TAl, TA2, LA) for interrogating subscriber circuits (Tsa ... Tsb) and for interrogating terminating circuits (Av . ..) assigned to incoming or outgoing lines from other exchanges. 10. A circuit arrangement according to claim 9, characterized in that by an interrogation control device (LA) via the terminating circuits (Av ...) the information received there via the relevant lines and unevaluated present information is still unevaluated and then logic circuits for their evaluation and one Information memory for recording information and evaluation results assigned 509 938/105 leads, so that the termination circuits are only used to transfer information. 11. Circuit arrangement according to claim 10, characterized in that evaluation results found as information to be passed on are supplied to termination circuits (Av ,,.) Which are only used to transfer information to the associated lines. 12. Circuit arrangement according to claim 10 or 11, characterized in that the terminating circuits (Av, Ai) contain only relays which are used only for the transfer of information. 13. Circuit arrangement according to one of claims 9 to 12, characterized in that the querying of the terminating circuits (Av, Ai) for information received and / or their delivery with evaluation results takes place cyclically. 14. Circuit arrangement according to one of the preceding claims, characterized in that the evaluation results obtained with the aid of logic circuits (4U) of the transfer control device (WG) may influence the transfer of the associated information. 15. Circuit arrangement according to claim 14, characterized in that according to the The length of time determined during the evaluation of a piece of information that represents and is to be passed on Character the duration of the forwarding is determined by counting the periodic calling of the relevant memory cell. 16. A circuit arrangement according to claim 15, characterized in that notes about calls already made are entered into the memory cells with the aid of the logic circuits (8 L, 8 K 1.8 K 2) common to all memory cells and compared with the predetermined number of calls until this latter number is reached, with which the counting is possibly ended. 17. Circuit arrangement according to one of claims 10 to 16, characterized in that the evaluation of information takes place before it is saved. 18. Circuit arrangement according to one of claims 10 to 16, characterized in that the evaluation of information takes place after its storage when it is passed on. 19. Circuit arrangement according to one of the claims 7 to 18, characterized in that an interrogation control device (TA 1, TA 2) for interrogating subscriber circuits besides ejnem information memory (511, S12) with the subscriber circuits associated memory cells for information about their operating status Information memory (521, 522) with memory cells in which addresses of subscriber circuits (7> a, .. Tsb) are stored so that subscriber circuits can be specifically queried with their help. 20. Circuit arrangement according to one of claims 7 to 19, characterized in that an interrogation controller for interrogating termination circuits other than an information memory with the terminating circuits associated memory cells for information about their Operating state still has an information memory with memory cells in which the addresses of Termination circuits are kept so that terminating circuits are specifically queried with their help can be. 21. Circuit arrangement according to one of the preceding claims, characterized in that a connection monitoring device (VU) with an information memory (SVU) is provided with memory cells in which addresses of sections of existing connections in the speech network (K) are stored in the information memory. 22. Circuit arrangement according to one of claims 19 to 21, characterized in that Memory cells that store information about the same connection path in the relevant Memory are arranged in such a way that they are all related to a fixed rule Memory cell addresses can be called. 23. Circuit arrangement according to claim 22, characterized in that the fixed rule is the Indicates equality of the relevant memory cell addresses. 24. Circuit arrangement according to claim 22 or 23, characterized in that in the Memory cells that store information relating to the same connection path, in total just all the addresses indicating the relevant connection path are stored, and the addresses of its beginning and its end and of parts of the way in between. 25. Circuit arrangement according to one of claims 21 to 24, characterized in that a memory cell in the forwarding control device (WG) after a request during dialing usually collects at most as much partial information as belongs to a digit dialed by the subscriber, whereupon this number is transferred to another device (SVU, SLA or Λ v) so that the memory cell is then available for any other incoming partial information. 26. Circuit arrangement according to claim 25, characterized in that digits dialed by a subscriber in the switching system, which are to be used for switching processes within the switching system itself, are each transferred to a different information memory (SVU, SLA) in which they are collected for use will. 27. A circuit arrangement according to claim 25, characterized in that digits dialed by a subscriber of the switching system, which are to be used in other exchanges for establishing connection paths, are passed on to terminating circuits (Av ...) for lines leading there. 28. Circuit arrangement according to claim 27, characterized in that to other exchanges Numbers and characters to be passed on from the transfer control device in the for this Interchanges and the lines leading there are delivered in the prescribed form. 29. Circuit arrangement according to claim 27 or 28, characterized in that the initial digits a subscriber number that is used to determine the direction of traffic for the outgoing connection are required, are first collected in another information memory (SVU) until they are used and, after the traffic direction has been determined, passed on via the forwarding control device (WG). 30. Circuit arrangement according to claim 26 and / or 29, characterized in that information memories (SVU, SLA) which belong to other control devices (VU, LA) which are already present are also used to collect digits. 31. Circuit arrangement according to one of claims 25 to 30, characterized in that the forwarding of digits to other exchanges takes place at the maximum speed, with which these digits can be processed there. 32. Circuit arrangement according to one of claims 25 to 31, characterized in that with the passing on of digits or information for switching processes in others Mediations to be used are already started before all associated partial information have arrived. 33. Circuit arrangement according to claim 32, characterized in that the relevant memory cell may only be released when the prescribed minimum break has expired is that must be observed for the spacing between characters, the consecutive digits or represent information. 34. Circuit arrangement according to one of claims 25 to 33, characterized in that the transfer control device (WG) has so many memory cells that the waiting times occurring due to the lack of free memory cells and the connections that are then lost do not exceed one per thousand of all connections. 35. Circuit arrangement according to claim 34, characterized in that even when connections are lost, requests from memory cells of the forwarding control device (WG) remain until they are dispatched, at which the requesting subscriber is then given a busy signal. 36. Circuit arrangement according to claim 34 or 35, characterized in that the occurring Waiting times by counting the periodic calls of the respective information or Memory cells supplying partial information are measured. 37. Circuit arrangement according to one of the preceding claims, characterized in that the peculiarity of a character, which is expressed by its temporal length and which represents incoming information, is obtained by counting the periodic calls of the relevant terminating circuit (Av ... ) Or subscriber circuit (Tsa ...) ) is determined. 38. Circuit arrangement according to one of the preceding claims, in which the subscribers can be connected to the speech network as desired regardless of their subscriber number, characterized in that an information memory (SUM) operated by a control device is provided for determining the connection position of a subscriber from his call number. 39. Circuit arrangement according to claim 38, characterized in that the information memory (SUM) also supplies information about peculiarities of the subscriber connections, such as notification service, order service, blocking of subscriber connections, etc. 40. Circuit arrangement according to one of the preceding claims, characterized in that that several information memories by a common control device for them Reading, changing and writing of information in memory cells can be operated. 41. Circuit arrangement according to one of the preceding claims with a spatial path multiple as a speech path network, characterized in that a setting control device (ES) is provided for searching, selecting and establishing and separating connection paths, which has an information memory (SES) with memory cells that have the Intermediate lines of the switching matrix (K) representing the spatial route multiple are assigned and in which information about the operating status of these intermediate lines is stored. 42. Circuit arrangement according to one of claims 1 to 40 with a time path multiple as a speech path network, characterized in that the information from the central control part are delivered to circular storage via speech channels that are to be established or separated, in a manner known per se with the help of distribution circuits for the duration of the relevant Connect the connection switch assigned to the connecting participants with a Control your heart rate. For this purpose 2 sheets of drawings 509 538/106 3.65 © Bundesdruckerei Berlin