DE1512034C - Circuit arrangement for the binary display of a switch position of a crossbar switch in an automatic telecommunication switching system controlled by electronic control devices - Google Patents

Description

1 2

The invention relates to a circuit arrangement in which the potential of this tap is not true in all binary display of a switch position of a cross-selected bridge differing from the potential value switch in an automatic telecommunication system, while in the selected bridge the Switching system in which computer or other has a certain potential value.

electronic control devices with the aid of FIG

Binary words operate relay operating units, embodiment with reference to the drawing

which, in turn, describe a desired connection, in which

direction (selector, relay set, line equipment) F i g. 1 is a block diagram of a computer-controlled

operate or select one of the devices that the telephone system shows,

so that the computer is able to determine their status io F i g. 2 shows the block diagram according to FIG. 1 shows

to control. the conversion unit shown in more detail

A telecommunications switching system of the above is

Kind contains a conversion unit, both the, Fig. 3 a test unit, of which the computer Relay operating units as well as the read matrices receive information in the form of a binary word, This conversion unit comprises that of 15 which the status of the various connection computers Binary information obtained in signals converting devices concerns, and a fast. Relay converts, which the relay units can control, shows the operating unit with the help of the computer and furthermore with the help of potentials that operate a relay operating unit from the signals received, Connecting devices are obtained and FIG. 4 a group of switches along with show their free or occupied status, which shows a relay unit, the board reading words for their actuation forms. The lines that the binary is seen

Status read words are contained by the computer F i g. 5 a crossing point in the selection matrix

selected with the help of a binary position selection word, shows in the details,

which is valid for the corresponding line, where F i g. 6 the location of the contacts in a code relay

shows this position selection word in a signal translation 35 Sc'halterbrücke and the

device that is also used in the conversion unit F i g. 7 a to 7 k are the binary words that are included in the is converted into a dial signal. position of a switch from the computer received who-this Dialing signal activates the desired line in the, as well as the binary words that show to the right Reading matrix. ner sent when a switch is set

In such a connection system it is important.

tig that one is able to control whether Fig. 1 shows schematically three main parts in one

a switch is in a position that allows the computer-controlled or stored program-controlled

control command corresponds, or in which position a telephone exchange. A becomes a

Switch is set. This latter fact telephone system z. B. conventional type

is important so that z. B. a new inscription shows which switch levels, digit reception

Exercise of all switching states carried out in the computer devices KM and connection relay sets SNR

if the recordings contain a reason that could be used by a calling subscriber Λ 61

any fault should be destroyed, and thus connected to a called subscriber Ab2

a connection path through the switch can be traced. Compared to a conventional

can. This control is carried out according to the existing telephone exchange system, however

made the invention possible. no control devices to be found, and all testing

The arrangement according to the invention is characterized by the functions and the selection of the connection paths, that each bridge in the crossbars are instead led out a group of display contacts with the aid of a computer D. The computer receives information about which has at least a certain con - 45 identity of the participants and the connection pre-clock in each starting position of the bridges actuated directions together with the information, so that the contact group with the help of the two visibly their occupied or free status a binary word of binary numbers in the form of various states of the contacts. He then selects from a list which represents the output of the bridge, which identifies in a sequence all the connection paths on which the bridge is set, contains 50 which, for a connection between two, have a common reading circuit to the connection desired points in the telephone exchange indicator contacts are required with the same position in the system, belongs to the closest connection bridges and normally has a potential in which all connection devices corresponding to the rest position are free, and then actuates all these devices. Close advertising but _gen 55 connected to the communication path by sending a specific potential value of the advert control commands in the form of binary words. There is the can, which brings the reading circuit to a binary information word with regard to the potential that corresponds to the working state, the state of the lines and the relays, these so that the group of reading circuits are given a binary word on the computer, and also word forms, which is readable by the computer and the 60 binary information words, which is represented by the computer for the position of the display contacts, and it is telephone switching system to be further characterized in that, so that the connecting devices to operate. This group of reading circuits can use the binary word for e.g. B. in both directions in the form of loziffriger the location of the contacts is characteristic, happen with a binary words.

specific bridge selected for control 63 Due to the large difference between

indicates, each activated display contact with one of the working speed of the computer, with which

Tapping of a voltage chemical belonging to the bridge that operates the connecting devices.

divider belonging to the bridge, where · binary words are generated, and the working

^{3 4}

speed of the relay and the switch is a senpufferspcicher BA over 16 lines with one

Conversion unit FE necessary, which is connected to the address register FA in which

Computer stores information received until the computer receives the calculated address in the form of a

slower working devices actuated a 16-digit binary word, and the other buffer

are, and those of the telephone system er 5 er memory, the result buffer memory BR, is over

hold state information until the 16 lines are connected to a result register,

Information regarding the status on the computer to which the computer is carrying out the calculated operating

ner has been given, as in more precise individual information in the form of a 16-digit binary word

still to be explained. The binary words that deliver or to which the information about the access

the information about the status of the connection, which was scanned in the telephone system,

contain conversion devices, and the binary words, supplied by the conversion unit FE. Ge

which contain the information about which measure F i g. 1 is in the address buffer memory BA

Connection devices are to be operated, referring to an address written in, z. B. the binary word

do not necessarily refer to individual pre-0000000000110011. In the result buffer

The binary word 0001000100010001 is at the same time the binary word 0001000100010001

lines (subscriber line equipment, switch, which can, for example, indicate that in

Relays etc.), and according to example 16 they contain a group of 16 devices, e.g. B. switches,

Devices, the identity of which is defined in these words by the address, the

stood an arbitrary device z. B. by a first, fifth, ninth and the thirteenth switch

0 is displayed while the busy state is set by ^ao , while the other switches are free.

a 1 is marked. Similarly, the binary number written in the result register

a 1 means that the connection device, but can also contain information in code form.

the received by the computer for the digit in the, e.g. the binary number 0000000000111111, the

ten word heard is to be operated, while that means that z. B. in one of the address selected

Device whose corresponding digit position is a ^{device containing a} 5 th and several relays

0, certain relays are not to be operated in the corresponding group of 16,

is actuated. As mentioned above, in the conversion

So that a 16 group can be found, management unit devices are necessary which must be operated by the test information from which information must be actuated, which are received from the computer in quicker or to which the operating instructions are to be sent 3 ° sequence, and which these address information is necessary. To store the information until a reasonable purpose, a word is also used which slower device has had sufficient time to contain Re-16 binary digits. This is shown in the schematic diagram or switch in FIG. 1. This can be seen from Fig. 2 table with the help of a switch symbol V , which shows the conversion unit in more detail, that the 16 conductors that show the status details as Fig. 1 and in which the information is sent to the computer or the operating information devices, which can speimation the information words from the computer to the connecting devices, which are supplied in rapid succession from the computer, are kept connected to those devices, are referred to as SMR and can be set by the address following "Fast relay operation units" called information is determined by the computer, which are via 4 <>. With VMR, a switch operating unit will be obtained with a further 16 lines. The connec- tion, and RMR identifies a relay earthing path ae to and from the telephone system zei- operating unit, the latter two entities receiving three scanning functions, namely the scanning of their operating signals from the device SMR subscriber state (a), the scanning of the switching . The devices are also displayed, the state (b) and those of the state of a controller that supply information to the computer with regard to the binding relay set SNR or a digit temp state of a corresponding device, starter KM (d), and two operating functions, such as a line tester LT, a switch tester namely the switch actuation (c) and the connection, VT and a relay tester RT. The last three reference record and digit receiver actuation (s). These functions are sufficient to explain the basic function to 5 »unit in the direction of the computer on the basis of the. Difference in the working speed, because the

The conversion unit FE consists of two parts scanning in a gel determined by the computer, one of which, B, contains devices, can be carried out at a speed. The around which can cooperate with the rather slow electromechanical conversion unit also contains a code via devices, e.g. B. with 55 setting device AO, the binary addressing relay in the telephone system, and the other information from the computer in a position in the room part C contains buffer memory that translates the fast, from and vice versa.

Computer can store information received. It should be pointed out that a quick response and pass it on to those parts which operate the relay operation unit SMR at the same time a number of relays and the switches. Parts B and C 6 »z. B. 10 slow units VMR, RMR operate in the conversion unit can geographically and that the number of relay units SMR can be arranged separately, z. B. in a large enough to receive in a sequence every distance of 100 m, with the part B close to the information from the computer with high speed or in the telephone network itself, while the speed and store them until the entTeil C in or directly with the computer D is arranged through the required slow actuation. Unit has been executed. If z. B. an

In Fig. 1 if two buffers are occupied when VMR is occupied, the next free unit becomes

Conversion unit FE shown, of which the address VMR from the computer on the basis of the assignment

Status information is used that is available to the computer.

In Fig. 3 RT identifies a test unit that provides computer-readable information with regard to z. B. the occupied or idle state of the Schaltbrückcn Viii, VBl etc. (Fig. 4) or the position of the switch bridges generated. The test unit contains a reading matrix AM in which each crossing point of one of the devices, e.g. B. the relay, corresponds to the state of which is to be checked, or corresponds to one of the contacts indicating a bridge number or a bridge position, as will be explained below. These points are selected line by line by the computer by sending a pulse-shaped signal to a line wire belonging to the corresponding line. Each point has a capacity that can be discharged when the pulse-shaped signal is received if it was previously due to the occupied state of the device, e.g. B. the relay that belongs to the corresponding point, or was charged due to the closed position of the contact that belongs to the corresponding point, as it is below in connection with Fi g. 5 will be described. As a result, a pulse-shaped signal is obtained through the column wires, which belong to points with charged capacities, so that the computer receives a binary read word in accordance with the line read by the pulse, which contains information regarding the free or occupied state of certain switch bridges or regarding the open or closed position of certain contacts.

F i g. FIG. 5 shows a reading circuit which belongs to each of the reading points AP in the matrix AM of FIG. A line belonging to the row is identified by r, a line ^{belonging to the column by A -} a line belonging to the column and by CaI a capacitance, one plate of which is connected to the line of the row and the other to the column line and also to a contact on the relay V. connected is. which belongs to the crossing point, an 0 potential being obtained from this contact in the closed state according to the example. The read pulses which are obtained through the row line r have an amplitude of -6 V. The voltage of the capacitance Ca 1 is V + 8V in the released state of the relay due to the fact that the capacitance is connected to a voltage source via a resistor . The amplitude of the read pulse is not large enough to pass through the rectifier G1, as a result of which no pulse is obtained through the column line. On the other hand, if the capacitance has 0 potential, since the contact belonging to the reading point is connected to 0 potential, the voltage on the cathode side of the rectifier Gl will decrease with the amplitude of the received pulse, and a pulse is obtained through the column line.

The reading pulses are fed to the reading matrix AM with the aid of a selection matrix UM (FIG. 3). In this matrix, each crossing point corresponds to a line to be read in the reading matrix, and these crossing points are activated by the fact that the row wire belonging to the corresponding crossing point and the column wire simultaneously receive a pulse-shaped signal based on binary selection information from the computer. A circuit belonging to a crossing point UP in the selection matrix UM is shown in FIG. According to the example, the circuit comprises an npn transistor T whose base is connected to the row wire and whose emitter is connected to the column wire, the collector being connected to a voltage source of -) - 8 V via a resistor R6 as well as to that of the row wires in connected to the reading matrix to be selected. In the absence of an incoming impulse, the is

ίο transistor locked, and the read wire that leads to the The transistor in the reading matrix has a voltage of + 8V. If a transistor in accordance is to be activated with the dialing signal received from the computer, the row wire receives a Momentum of z. E.g. 4-1.5V and the column wire a pulse of e.g. -1.5V, causing the transistor becomes conductive and the selected row wire in the read matrix receives a pulse of -6 V, which passes through all those capacitances in the read matrix that are connected to 0 potential pass through. the Rectifier Gl becomes conductive, and a pulse is generated via the column wire belonging to the rectifier receive. At the sampling points where the capacitance is connected to +8 V, the rectifier will not become conductive due to the dial pulse of -6 V, and will through the column wire no pulse received.

As in connection with Fig. 2, the pulses obtained by the column wires in the reading matrix form e.g. B. a 16-digit binary information word with regard to the state of the 16 contacts belonging to the line, and this word is first placed in a buffer memory BR and from there to the computer, which processes the binary word further.

The selection word which selects the line to be read is given by the computer to an address buffer memory BA , but this word must first be encoded in a suitable manner so that it can select a line and a column in the selection matrix UM. Code translation can be done in many different ways. According to the example, the selection matrix has 11 rows and 8 columns selected in such a way that in a signal translator OK three binary digits are translated into 1 of 8 and used to select a column while five groups of each two binary digits can be translated into 1 out of 4, thus allowing 4 ⁵ lines to be selected. These five signals form the five input states of the AND circuits OK 1, OKI , etc., which belong to the corresponding lines. It should be noted that there are a large number of other selection matrices and other devices, for example high-speed relay operating units, the rows of which are each ^{actuated by one of the aforesaid 4 r} 'combinations.

A fast relay operating unit is identified with SMR , which operates slower relay operating units with the aid of the binary words from the computer, which in turn operate switches and relays in the telephone system. As mentioned above, the fast relay operating units are necessary so that they can be operated by the short pulses from the computer and hold the information thus obtained until the considerably slower relay operating units operating the switches have had sufficient time to be operated. The shown fast relay operating unit SMR is

7 8

The switch used according to the example is a bistable circuit Ml, Ml , etc., which are operated by a switch of the crossbar type, the so-called signals of the computer, and code relay switch, in which each bridge 12 Rows also includes a fast-working relay RR1, RR2 and 17 columns of contacts. Included with each etc., for example a reed relay; wel- 5 row belongs to a conductive rod with which one or ches is connected to that output of the bistable multiple contacts in the corresponding row by circuit, which corresponds to the activated actuation of a lifting rod of the corresponding state, and which can be connected to a working contact column . F i g. 6 keeps contact of a current path closed, which shows an example of the grouping of the contacts to the switch operating unit VMR , as long as io a code switch bridge that is used for. a four-wire bistable circuit remains in the activated state, connecting one input to 42 outputs. The choice of a line in the quick re-viewed is, of which only 40 are used. The relay operating unit SMR will in the same way contain contact columns 1 to 14 the output concomitant as the selection of a row in the selection matrix UM clocks, and the contact columns 15 to 17 are used for ^{level selection through the 4 5} signal combinations from the address buffer 15. Each contact line represents remote memory BA executed. The activation of the 16 4 lines shows that the connection is four-wire. If, on the other hand, individual bistable circuits in a row are connected to a desired output through the row wires, a contact column in the high-speed relay operating unit, which sends a pulse group 1 to 14, and a contact column in the in accordance with the binary word 20 groups 15 to 17 actuated, and thereby it is forcibly maintained which the result register BR from. An outcome is actually determined. The choice of contact has received. For each intersection there is a split according to the example using 6 codes, an AND circuit Kl, K 2 etc., one of which has single rods (in a two-wire version, a line with the row wire and the other with the 7 code rods are necessary), which have recesses Column wire is connected so that only the AND »5 are provided, so that when the circuits are shifted in parallel, the circuits are activated in an addressing code rods in other combinations a sparing line, a working signal from the result register BR tion under two of the columns, a -in received. In this way, the bistable circuit belonging to the intersection of groups 1 to 14 and a bistable circuit belonging to group 15 to Punkt is activated, this recess being brought through all code fourths so that the relay picks up 30 bars. The recesses allow and complete the circuit. The AND circuits passage of the rotatable arms, which belong to these OK 12 a, OK 12 b, OK 13 a, OK 13 b , etc. of the rows, two columns, these arms corresponding to the AND circuits OiCl, OKI , etc. in turn Bridge magnets in a position according to the selection matrix, but they will set themselves to operate the lifts belonging to these columns understandably by combinations other than these rods, so that the contacts in are operated. The difference is that these two columns can be closed here, two separate AND circuits OKlIa, OKHa The bridges are of the currentless type, that is, the etc. for actuation and OKlIb, OKlZb etc. bridge magnets BM 1, BMl etc. work only while there is waste. The output signal ends the operation to allow the actuation of the lifting position of these last-mentioned circuits to switch the bi- 40, after which the contacts are closed stable circuits of the same row, in the closed and in this closed position through stand0, whereby the high-speed relay RR1 , Spring force can be maintained. Fig. 6 shows a case of RR1 and so on of the line falling. As mentioned above game for the grouping of the contacts in one was, a fast relay operation unit SMR bridge, if a four-wire connection between simultaneously several, z. B. 10 slow units 45 is made to the input and output 20 , serving VMR, RMR , and the number of fast, which means that column 6 and column 16 relay operating units is large enough to be operated. In FIG. 6, the positions are also all information received at high speed from the computer receiving code bars SH1 to SH 6 in accordance with the switch setting can be stored with the code bar activated until the corresponding operation from SH 2, SH 4 and SH 5 shown with the other being guided. are in the rest position, ie in the position in FIG. 4 shows a switch operating unit VMR, which the switch does not connect any input to an outgoing number of (in the example 20) crossbar line. One of the contact groups, according to switches KVl, KVl , etc. operates, each of which, in the example, the contact group 42, has no outer 10 bridges BVl, BVl , etc. contains. The switch connection, and on the basis of this fact the operating unit VMR comprises relay groups whose stated rest position is achieved, with all relay positions with their normally open contacts being a number of mutually mechanically different current paths in the form of a contact pyramid. It is easy to see that when the mide is set in a familiar way. Through the actuating contacts in columns 13 and 14 are actuated, supply of relays in the relay group Sl to S 5, it is 60 no connection to an outgoing line is possible to close 32 different current paths, and that this position as the rest position of the of which are used according to Example 20, switch can serve. As a result, one of the 20 switches will be selected in the following. One of the 20 re-. The expression switch positions in general lais W1 to W 20 is used by one of the current paths regardless of whether the rest position is actuated, this relay being meant by its working position or one of the set positions. contact a current path to the selected switch The various switch positions can then be closed, so that a bridge can only be set in the selected switch with the help of a 17-digit binary word. be pressed. The position shown in Fig. 6, in

9 10

that the bridge is set in position 20, a test can be carried out to check whether the relays have picked up according to the command received by the binary word 00000100000000010, and the rest position can be pressed using the relay W according to the example Wl, which can be expressed by binary word 00000000000001100. The relay 51 to SS was selected, an on-This fact is used to give the computer 5 train command in that from the fast relay information regarding the position, in operating unit SMR current in the current path 17 or a selected switch bridge is located . That will deliver. Because of this, the selected bridges are namely connected to a further contact switch KV 2 with VMR . Then the line Zl, Z 2 ... Z17 is equipped, as shown in Fig. 6 Relay Kl shows the pick-up command from the unit SMR , in which for each actuated contact column an io through the current path 18 and supplies current to the Betä contact is closed . This contact then forms the processing of the code rods SH 2, SH 4, SHS. Then ereinen a mechanical memory, from which the relay Kl holds the pick-up command via the wire computer information about the actuated contact 19, and it in turn applies the operating voltage to the columns, ie via the switch position, receives, as is bridge KSl in switch KV 2, so that the bridge will be explained in more detail. 15 magnet BMl in KVl attracts and the

The switch operating unit VMR in FIG. 4 contains clocked spring force releases. Then, according to the embodiment, a relay group 51 drops off K1 and interrupts the current to the bridge, so that up to 55, in which the normally open contacts, a contact spring force again act in the bridge and form the pyramid, which can close 32 different current paths clock gaps, which can be closed by the setting (which according to the example 20 as the code bars were selected. Then, the number of all corresponding switches used fall advertising relay in the unit VMR and the Brükden), and further includes a relay group Vl keneinstellung is finished.

to VA, in which the normally open contacts form two con- The processes happen with a certain timing pyramids, each of which forms 16 different intervals, which can close the current paths through the function of the computer. Of these 25 is determined. This function is only mentioned here in so far as it is used to explain the pyramid of the invention around one of the 10 bridges. Fig. 7 shows the computer to operate one of the switches, as well as 10 current paths received and sent to the computer information of the other contact pyramid to the state mations in the form of 16-digit binary words. According to these bridges control, as explained below 30 the example is intended to be used in the rapid relay operation. Furthermore, the switch operating unit SMR contains the points 1 to 16 in the first line unit VMR a relay group Hl to H 6 to influence the matrix of the current paths 1 to 16, closing of current paths that the 6 code rods which the relays Hl to Hl, Vl to V 4 and 51 to operate one of the switches (in the case of the two operate 55. This is done in such a way that there are 7 code rods in the wire connection and in line 1 with an address code in the form of a consequent further relay HT). With one of the 16-digit binary words from the address register BA ge-20 current paths from the relay group 51 to 55 are selected and the intended points in one of the 20 relays Wl to W 20 are actuated, namely line with a single digit binary word activated in accordance with which the switch that is received from the result register BR has been selected. These relays close by 40 Fig. 7a shows the two binary words. Fig. 7 is divided into its contacts current paths for the operation of the bridge three columns, of which the first the address received from the ken and the code bars in the selected switch, computer, the second the address received from the computer while the current paths to the unselected ner Instruction or command and the switches are held interrupted. The third switch, the information regarding the state of the operating unit, also contains a relay K1 to show 45 of the connection devices that are sent from the current to the current paths for the operation of the telephone system to the computer. To supply a relay K2 to supply current to the current address word according to Fig. 7a is in connection with paths for the bridges, and a relay K 6, the example described without interest, since it is about current to the test paths of the bridges as a combination of five 4-digit binary words as it will be described below. The switch 50 was selected in the same way as was described in connection operating unit VMR receives power for operation with FIG. 3. The relay called Instrukaller on the current paths 1 to 20 tion word in Fig. 7a on the other hand contains information from the normally open contacts of the relays RR1 to RR 20 functions for the selection of position 20 in the bridge in the high-speed relay operating unit SMR. No. 1 of voter No. 2, ie the binary digit 1 in the

If it is assumed that e.g. B. the bridge 55 digit positions 2, 4 and 5 (relay Hl, H4, HS), in

VBl in the switch KV1 in the position 20 to the digit position 11 (the relay V 4) and in the digit

is set, the following procedure results: remote station 15 (relay 55).

First, the relays Hl to Hl receive information twenty milliseconds after the start of the process

Use wires 1 to 7 to determine which code will result in a test of the actuated relay

rods are to be operated; the relays Vl to V 4 ER- 60 carried out by the computer using an address

hold information over wires 8 to 11 in the test unit / ϊΓ select a line from the

visibly the bridge number in binary form, and the points 129 to 144 consists and to which the contacts

[Relays 51 to SS receive 0 potential applied via wires 12 to 16 of the relays operated in VMR

Have information regarding the counter number in. As in connection with Fig. 3 has been declared

Binary form. According to the example, the relay 65 is received by the computer from the test unit RT

Hl, H4, HS (see Fig. 6), the relay V (bridge no. 1, one digit binary word, which indicates soft relays

in binary code 0001) and relay 54 (switch are actuated. This word must be combined with the instruction

No. 2, in binary code 00010). After a wqrt be identical to that on the columns α of SMR

11 12

was given. Fig. 7b shows the address word steadily and passed on to the computer,

to choose the points 129 to 144 in RT and which are 16-digit words, it will in certain cases

Control word taken from RT. If necessary, add two lines to the test unit

the control shows that the choice was correct, will use sensing of the position of the switch,

the line no. 2 is chosen in SMR , and the matrix 5 This is however by the program of the calculator

Point 17 is solved with the help of a 16-digit instruction and has nothing to do with the basic idea of the invention.

tion word according to FIG. 7c activated. dung to do. According to the example, the test

After a further 20 milliseconds, the relay unit RT receives points 1 to 16 in line 1 and the

Kl the tightening command by selecting line 2 point 145 in line 13 for scanning the position

in SMR and the activation of point 18 io an arbitrary bridge from the 200 to the

(See Fig.7d), which means that the magnets of the bridges belonging to the switches are provided. for

selected code rods are operated (see description of another switch operating unit and the one associated with this

exercise of Fig. 4). Unit belonging bridges are z. B. the points

After a further 20 milliseconds, Kl receives 17 to 32 in line 2 and point 146 in line 13

Tightening command used by selecting line 2 in SMR 15.

and the activation of point 19 (see Fig. 7e). In- As mentioned, the die points have consequently actuated the selected bridge. In this context, the test matrix TM should also point out two different voltages that operate currentless bridges due to the actuated test contacts in that the code relay switch is connected to two of the 17 test points according to the example with a bridge, i.e. the contacts ao the test matrix has 20 horizontal wires accordingly, 20 switches and 10 vertical wires are held in the closed position by spring force, and the actuation of the bridge serves the 10 bridges. Each coordinate wire is connected to +24 V via a resistor R just for the purpose of the spring force acting on the contacts. The releasing and the actuation of new contacts in front of the parts of the rod with which the test contacts of the prepare. Then again no current through the bridge is in contact, are flowing with one for both bridge magnets, and the spring force closes parts of the common crossing point (SD 1/1, SD 2/1 the contact. Since this process takes a certain time ... SD 10/20) connected and claimed in the test matrix TM , this is the explanation for why the establish one of the bridges. Each crossing point in the holding current of the bridge is not released before the test matrix is with the horizontal wire and with the expiry of 130 ms by setting the bistable 30 to the corresponding vertical wire by a Widerlen circuit in point 19 of the SMR. According to Fig. 3, R was connected, the value of which is equal to the resistance of each row in SMR 2 row wires, of which the horizontal wires or the one together with the pulse for the corresponding vertical wires are connected to +24 V. On this the column the bistable circuits in the working way will be able to bring a voltage position for each crossing point and the other wire will get all 35 dividers, which is formed by the resistors R bistable circuits in the row in the 0 position. By closing the contact of the relay sets. The binary word, which this last-mentioned K 6 is activated according to the invention 0 potential to the VerZeile, is now given from the address buffer memory tikaldränke in the test matrix TM via the contact to the unit SMR , and as a result, pyramids Vl to V4, one of the Selects 10 bridges, which the bistable circuits 17, 18 and 19 to 0 40 and also to the horizontal bridge through the cone (Fig. 7f), but immediately afterwards clocks of the relays W 1 to W 20 are applied, one of the bistable circuits 17 and 18 (Fig. 7g) select 1 switch. Set by applying 0 potential, so that the current only in the circuit 19 to a horizontal wire and a vertical wire disappears and the bridge magnet drops. Before it becomes clear that only the relays for the selected bridge are released in order to make the unit VMR 45 listening crosspoint 0-potential free for the next operation, according to the rend, the one for a selected horizontal wire and that of the present invention becomes one Check through a cross belonging to a selected vertical wire, whether the switch bridges assume + 8V in the correct setting points and whether the crossing has been set. points that do not have a selected horizontal or

As mentioned above in connection with the description of the 50 tical wire, assume +16 V, as has easily been mentioned about code relay switches, every bridge has to be seen. As a result, only one of the 200 bridges receives no additional contact line (Zl, Zl ... Z 17) in order to be able to determine the O potential for its closed test contacts, which of the contact gaps the O potential at the corresponding intersection is actuated. The contacts in this line include points from the test unit R 1, and therefore a rod will receive information on the position of the lines in the same way as in the other 55 computers, but this rod is obtained as it is in accordance with the bridge chosen in connection with the two contact groups 1 to 14 or 15 to 17 with the description of the test unit, divided into two parts, and each rod is separated by a rectifier with a point in the test check whether the ge test matrix TM is connected. The matrix points may 60 desired bridge setting has been achieved. The nen have two different voltages, and the computer also checks that there is only one contact in them through the two actuated test contacts of the group for the selection of a particular individual bridge (as mentioned above, two columns must be in output, according to example 1 to 14, and in which a bridge must always be operated, also in the group for the choice of the level, according to the at rest position) with two reading points AP and the 85 game IS to 17 is closed. More or less test unit R1 connected. As mentioned above, one of the contacts indicates a fault in the bridge. 17-digit binary word for defining the position. Fig. 7h shows the binary word which is necessary for the operation of a bridge. Since the words caused by the relay K 6, and Fig. 7j shows the binary

Word that is received when checking the bridge that has already been set, whereby according to the example it is bridge no. 1 in switch no. 2. This bridge is now selected by the switch operating unit VMR , and due to the fact that it has been set to position No. 20, the binary word 00000100000000010 is obtained from the crosspoints 1 to 16 and 145 of the test unit RT , which are common to all 200 bridges . In Fig. 7j only the first 16 digits of the binary word are shown for the sake of simplicity. Of course, the 17th digit is also given to the computer using a second 16-digit word, and the information is then treated as a single continuous word.

It can be seen that the invention enables the same crossing points in the test unit RT to give an answer regarding the position of an arbitrary bridge selected from the 200 bridges, although the actuated contacts in all these bridges share with the points of the test unit RT are connected. This arrangement enables the contents of the computer's memory to be checked and a connection path to be followed through the switches.

Claims (2)

Patent claims: 1.Circuit arrangement for the binary display of a switch position of a crossbar switch in an automatic telecommunications switching system, in which computers or other electronic control devices operate relay operating units with the help of binary words, which in turn operate a required connection device (selector, relay set, line device) or select one of the devices so that the Computer can control their state, characterized in that each bridge (VBl, VB2 ...) in the crossbar switches is equipped with a group of display contacts (ZI. Z 2 ... Z17), of which at least one specific contact is in each case Initial position of the bridges is actuated, so that the contact group with the help of the two different states of the contacts represents a binary word which is indicative of the output of the bridge to which the bridge is set, with a common read circuit {API, ΑΡ2 ... ΑΡΠ ) to the display co ntakten belongs to the same position in the bridges and normally has a potential which corresponds to the rest position, but can be connected to a certain potential value by closing one of the display contacts, which brings the read circuit to a potential corresponding to the working state, so that the group the reading circuits forms a binary word which can be read by the computer and which represents the position of the display contacts, and further characterized in that so that the group of reading circuits displays the binary word which is characteristic of the position of the contacts at a particular bridge selected for control , each activated display contact is connected to a tap of a voltage divider belonging to the bridge (SD 1/1, SD 2/1 ... SD 10/20), whereby the potential of this tap in all unselected bridges differs from the specific potential value, while the chosen bridge has a certain potential has worth. 2. Circuit arrangement according to claim 1, characterized in that the voltage divider (SD 1/1 ... SD 10/20) forms a test matrix (TM) in which each voltage divider is connected to a row wire and to a column wire, the row wire and the column wires belonging to the voltage divider of a bridge are connected, when this bridge is selected, to a voltage source, the value of which is selected in such a way that the particular potential value occurs only at the tap of the voltage divider belonging to the corresponding bridge . For this purpose 2 sheets of drawings