DE1196251B - Circuit arrangement for a centrally controlled telephone exchange - Google Patents

Description

Circuit arrangement for a centrally controlled telephone exchange The invention relates to a circuit arrangement for a centrally controlled Telephone PBX, in which an identifier identifies the calling stations identifies and the dial numbers of calling stations on a central Election evaluators are transmitted and through this election evaluator the voting numbers Switch on the devices for setting the connection path with the corresponding symbols.

There are already circuit arrangements known in which the calling Intercom stations are identified in an identifier that indicates the connection these bodies to free transfers via facilities for the production of the Connection path controls. There is no central election evaluator in these arrangements present that only when finding a complete for connection establishment usable combination of markings also the mentioned facilities for the production of the connection path over the same multiple controls.

The object of the invention is in a centrally controlled private branch exchange with a central election evaluator the election evaluation and control in a simple manner the facilities for setting the connection path both outgoing and incoming to enable.

This is achieved according to the invention in that the identifier the identifier for a calling station via a first digit multiple to facilities for setting the connection route and the election evaluator who uses a second multiple of digits receives the dialing code and each of these codes evaluates, only after recording a usable for further connection establishment Identification combination by means of the common control device via the said first digit multiple the characters corresponding to the dialing code for the facilities for setting the connection path.

This makes it possible in a simple manner to identify and the central election evaluator to a first digit multiple and facilities Adjustment of the connection path by means of the common control device one after the other to work while still being able to use the central election assessor to work on a second multiple of digits regardless of the identifier. This means that the election evaluator is responsible for evaluating the election numbers and the Identifier for controlling the setting of the connection path at the same time can work on two different digit multiples. This makes the effort reduced in the central facilities and simplified control.

An exemplary embodiment of the invention is shown in the drawings. Only the details that are important for understanding are shown. In Fig. 1 is an overview of the facilities of the central PBX described shown; F i g. FIGS. 2 to 4 show circuit details for the most important ones in FIG G. 1 facilities shown.

In the following, the centrally controlled private branch exchange system is described in detail with the functions that relate to the switching operations between the election evaluator WB and the central control device GSt and the subscriber line switch TA using the drawings.

The election evaluator WB in FIG. 1, the reference information obtained via the multiple Z2 coded indicator display, from the respectively switched-dial memory Wh and Wa. There are thus evaluated by the choice Reviewer WB all the digits encoded in the dial memory or received decadic and are transmitted to the evaluators.

On the basis of the code information received, the election evaluator WB recognizes the end of the election at a central point, e.g. B. after the first or, for example, after the presence of the first and second or the first, second and third code digits.

When the end of the election is recognized, the election evaluator transmits an identifier to the central control device GSt, and the central control device controls thereupon, which by this indicator and by another, identifier given in particular by the occupied transmission via the dialing memory certain function.

Prerequisites for the aforementioned task of the WB election evaluator are the freedom of movement in the allocation of numbers and the ability to expand as required with regard to the number of possible programs. These prerequisites can be met with an economically justifiable effort by the central facility.

This only requires maneuvering at one point, for example by re-soldering rectifiers or by replacing the central jumper plates.

The extension of new key figures, already planned or new ones Functions depending on the various states of the connection paths is carried out by Replica achieved at a central point. For this purpose, for example, only new patch panels are required, on which only individual places are rewired to be re-plugged. Since it is If this is only one expense per plant, one can provide for new ones Allow patch panels. The type of number evaluation in a private branch exchange with a central election evaluator brings a significant simplification for the production and for subsequent changes and extensions.

The election evaluator ensures galvanic decoupling of the intended both multiples for coded digit weighting and for decoded digit weighting. This separation allows two different pieces of information about the different Digit multiples are stored and processed at the same time. This is for example of importance for control processes during a connection that are independent of are authorized, but do not initially require a re-marking. The result the respective election evaluation appears as a potential on output lines, for example to the common control device GSt practically suddenly. This means one Increase in the working speed of the system.

You can also use the two digit multiples for a control process different labels, for example switched on for different connection points will.

The electoral evaluator receives the electoral information coded as a three-digit code, for example, or in decadic form from the electoral memory. Since the election evaluator WB is only provided once per system, multiple occupancy must be prevented. This is done by the selection memory seeker SU. The voting memory finder SU allows only one voting memory to be connected to the election evaluator WB at the same time. The election evaluator is requested from the voting memory after each code number is dialed, for example in the case of decadic or coded dialing after each number. After a code number has been recognized, the transmission of another code number can also be skipped temporarily or permanently. The electoral judge will be activated after each evaluation. In the case of decadic pulse dialing, the code digits received in each case are converted into coded codes in the dial memory Wh or Wa. These coded identifiers are then transmitted to the so-called coded digit multiple for the election evaluator WB. The three digits mentioned, which are transmitted from the dialing memory to the dialer, identify, for example, the connection number of a called station.

In addition to these three indicators, as already mentioned, another indicator is transmitted with each code number of a code to the election evaluator WB in order to identify in the election evaluator the switching state of the transmission of the connection path occupied by the calling station and accordingly also from the election evaluator a corresponding to the switching state Carry out evaluation and, on the basis of this evaluation, which is dependent on the switching state, also carry out a control of the central control device GSt which is dependent on the switching state and the evaluation. The relays characterizing the operating states are each switched on by the common control device when the state is established. The additional control characters that can be transmitted from the dial memory Wh or Wa to the central dial evaluator WB are, for example, the following: I. End of dialing code or dialing pulse series in the case of internal dialing, identified by the relay ZE in the election evaluator WB; IL End of dialing number or dialing pulse series in case of post-dialing after connection has been established, identified by relay ZN in dialing evaluator WB; fII. End of dialing number or dialing pulse series with direct dialing, marked by the relay ZD; IV. End of dial number or dial pulse series when all house transmissions are occupied for controlling the pre-assignment of an office transmission for evaluation of the still to be received office number by the relay ZV of the election evaluator WB; V. End of the dialing number or dialing pulse series in the case of an outside line control, ie switching the election evaluator as a blocking follower, identified by the relay ZW in the election evaluator WB USW.

The aforementioned control characters are given when a dial memory Wh or Wa is occupied by the transmission of the connection path and stored therein. These characters identify the intended use of the dial memory in the present case, in particular as a function of the switching state of the transmission occupied for the connection to be established or established. The symbol for the switching status is given again by the memory to the dialer when each dialing code is transmitted.

The election evaluator can, based on the received identifier, for example Submit the following control characters: 1. Trigger the voting memory finder and the voting evaluator in the event that the election has not yet ended and there are further dialing codes or Election impulses for evaluation have to be awaited; 2. Triggering the dial memory finder and the election memory as well as the election evaluator if the election does not produce any results leads, for example when not connected or blocked Phone numbers; 3. Requesting the common control device after the election for initiation different functions.

Only in the latter case (3) is the common control device occupied, and in the two aforementioned cases 1 and 2, this assignment is omitted. To each At the end of the election, a further identifier must be transmitted, which indicates the type of further Functions. This can involve submitting a specific code number, but can also include an integer group for marking.

In order to determine one of the three possibilities mentioned above, It must be marked in the election evaluator how many digits are currently used for evaluation are present. For this purpose, common ones, tens and hundreds relays are used switched to the coded number multiple.

After determining the switching status and selecting a certain code number or key figure can be a blocking evaluator instead of the election evaluator to evaluate the further code number dialing can be switched on at the number multiplex Z2 (see Fig. 1).

The functional details of the election evaluator for cases 1 to 3 are discussed below with reference to the exemplary embodiment shown in the drawing. As has already been stated above, for each selected code number which is offered by the voting memory to the election evaluator for an evaluation, the three meanings mentioned above can have the above-mentioned three meanings; namely wired, not wired, end of dialing and function control. a) Functional overview (Fig. 1) The subscriber circuit T 1 is assigned to the call station N1, and the call station N 1 is connected to a mixing coupler Mk via the subscriber circuit T 1 and coupling points of the coupler EK 1 and the coupler ZK 1 for outgoing connections. The mixed coupler Mk switches through to the house transmission HU. This switching through of the intercom N1 to the house transmission HU takes place by marking the intercom from the subscriber connection switch TA and marking the house transmission from a house transmission seeker HS with the aid of the common control device GSt. The details for the route search are not decisive for the invention and can be carried out in a known manner. If the connection to be established is a house connection, the subscriber dials the number of the extension to be called, and in this case the dial memory Wh is connected to the house transmission HU via the memory coupler SK. The voting memory Wh records the selected code numbers and transmits them in coded form, for example in the 2-out-of-5 code to the election evaluator WB. If the selected code is complete, the election evaluator WB sends an end-of-election indicator to the common control device GSt, and this causes the marking with the aid of the subscriber line switch TA and the identifier 1d. The coded identification is decoded by the election evaluator and transmitted to the subscriber line switch TA. In parallel with the marking of the called connection point by the identifier 1d, the authorization is determined by the authorization evaluator BV, which receives the identification of the called connection point from the subscriber line switch TA.

To the right of the election evaluator, the digit multiple Z2 is shown, via which the code digits to the election evaluator are transmitted from the election memories Wlz or Wa in coded form, for example in a 2-out-of-5 code. A corrector can also be connected to this digit multiplier Z2. On the other side of the voting evaluator, the digit multiple Z1 is switched on, which is, for example, a decoded digit multiple. A decoded digit identification can be connected to this digit multiple either from the dial evaluator WB or from the subscriber line finder TS or from the identifier 1d. In any case, this is recorded by a subscriber line switch TA or transmitted to the authorization comparator BV.

The subscriber circuits of different speech stations can simultaneously give incentives to the subscriber line searcher TS. At the same time, however, the subscriber line switch TA can only accept one incentive. The incentive from the subscriber circuit can be used, for example, to mark the switching stages and / or to determine the authorization of a connection point during the connection. This incentive evaluation can take place independently of the switching operations in the selection memories for other connection points which simultaneously give digits in the election evaluator and for an election evaluation. The election evaluator WB can therefore initiate switching processes for other connection points independently of the subscriber line switch TA. At the same time, the election evaluator cannot undertake such switching operations that act on the subscriber line switch TA at the same time.

The election evaluator can therefore work in parallel with the subscriber line switch TA , but the subscriber line switch TA cannot simultaneously cause an incentive from a subscriber circuit and an inquiry from the electoral evaluator. If, for example, the dialer has determined via the digit multiple Z2 that the calling station has dialed an exchange code, then by requesting the common control device GSt and identifying the calling connection point on digit multiple Z1, the switching from a house transmission to an exchange transmission is made. The calling station N 1 is connected to the exchange transmission AU via the subscriber circuit T 1 via the coupler EK1 or coupler ZK1 and via the intermediate coupler Mk.

The code numbers now dialed by the calling station are, since a different switching state is identified in the dialing memory, evaluated differently by the dialer than code numbers that are transmitted for house connections. In this case, a corrector can also be connected to the decoded digit multiple Z2. The individual switching operations will be discussed below. Incoming trunk connections and incoming house connections are made via the mixer couplers MA and Mk. The outgoing connections are made via the corresponding mixer couplers MA and Mg. The control of the switching through of the connections is not important for the subject matter of the invention and is therefore described in detail.

b) Incomplete dialing (hundreds code number only) It is assumed that the subscriber of the sprceh station N210 in FIG. 2 via the subscriber circuit T1, the crosspoints of the switching stages EK 1, ZK I and Mk is connected to the house transmission HU . It is also assumed that the house transmission HU is connected to the dial memory Wh for house connections via the memory coupler SK.

If the subscriber of the telephone station N210 now dials a code number, for example one of the hundreds code numbers 2 to 8 of a three-digit code, the corresponding dialing pulses or the corresponding dialing code are transmitted in a known manner via the memory coupler to the dialing memory used for establishing the connection by means of the dialing memory finder. In the dialing memory, the dialing code received is transmitted via a counting chain ZK 1 to the corresponding identification relay for this code number. If the selected code number, for example a 2, the hundred relays Wh 1 and WH 3 are switched on in the dial memory Wh. Via the contact 1 sa 1 characterizing the selection memory Wh and the contact 10 sg of the memory seeker SU, if the uniqueness for the selection memory Wh in the chain of sa contacts is given, the relays are now via the contacts 2 wh 1 and 3 wh 3 DH 1 and DH 3 of the election evaluator WB in FIG. 3 switched on.

Before these relays DH I and DH 3 are switched on, the rectifiers G 1 and G 2 in FIG. 3 the relay GH switched on, so that the aforementioned circuit for the relays DH1 and DH3 can be established via the closed contact 4gh. By closing the contacts 5 ie 1 and 6 ie 3 , the relay Th is switched on via the rectifier G 3 via the contact 7 ze, which is still closed.

The last-mentioned contact 7 ze of the relay ZE is closed depending on the switching state of the occupied house transmission HU. The relay ZE is then switched on via the contacts 1 sa 1 and 10 sg when the contacts 8 n and 9 k in FIG. 2 of the selection memory Wh are in the rest position. The relay ZE indicates that this choice is an internal choice when establishing a connection. In this regard, internal voting means voting via the B-side of the house transfer HU.

By closing the contact 20 th in FIG. 3 the relay RS is switched on via the contacts 20 th and 11 gz in the election evaluator WB . By closing the contact 12 rs, the relay SEI (FIG. 2) in the selection memory is switched on via the unactuated, common one contact 21ge. The contact 13 se in the selection memory Wh in FIG. 2 opens the circuit for relay SA 1 of memory seeker SU. It is therefore released when the incomplete selection of the memory seeker SU is found . By releasing the memory viewfinder by means of the contact 1 sa of the holding circuit for the Markierrelais DH DH 1 and 3 in the choice Reviewer WB in F i g. 3 switched off. The contacts of these relays become ineffective in the corresponding correcting devices, ie in the exemplary embodiment via the routable wiring. The election evaluator is then released. The election evaluator WB can now be requested again from a new election memory. The selection memory is requested again with the aid of the memory finder SU. This memory seeker SU ensures uniqueness, ie it ensures that only one selection memory can be connected to the election evaluator WB at the same time. This is done in a known manner by switching contacts for the relays SA 1, SA 2 , etc., which characterize the connection of the selection memory, are connected in a chain, via which the holding circuit for the connection relays can come about. In the drawing, only the contacts 22 sa 1 and 23 sa 2 are shown.

Through the relay Th, the hundreds code number is selected at the switching state marked by the ZE relay indicates the incomplete selection, and appropriate switching operations are initiated.

c) By dialing a code, the result "subscriber not connected" is obtained. If the subscriber to a call station is in the manner described above via the house transmission HU and the dial memory coupler SK with the dial memory Wh in FIG. 2 and the subscriber of the intercom dials, for example, the code for a blocked or unconnected subscriber, one of the relays Bh, Bz or, for example, C 1 is switched on in the dialer when the dial memory is switched on. These relays can only be switched on if the relay ZE is switched on via contacts 1 sa 1, 10 sg, 8 n and 9 k in FIG. 2 is switched on and thus it is indicated in the dialing evaluator that the selected code is a code for internal dialing when establishing a connection. The circuits for the said relays can therefore only come about via the corresponding contacts 26 ze or 31 ze or 34 ze.

By dialing the hundreds code number 9, the relays DH3 and DH5 are switched on when the voting evaluator is switched on. It is therefore switched on via the contacts 24 ie 3, 25 ie 5, 26 ze and the rectifier G 4, the relay Bh (I) .

By closing the contact 27 bh (FIG. 3), the relay TR 1 (FIG. 2) is switched on via the contact 1 sa in the memory finder SU . In the in F i g. 2, only indicated manner, the isolating relay TR of the memory seeker SU is switched on by the contact 28 trl. By switching on the relays TR 1 and TR, the activation of the selection memory Wla and the memory seeker SU as well as the selection evaluator WB is initiated. The electoral evaluator is activated, for example, by moving the contact lsa of the memory seeker to the rest position. The election assessor WB is available for a new allocation.

If, as described in section b), the hundreds code number 2 is selected and then the code number 2 and the connections starting with 22 are not connected, the relays ZE, DH 1 and DH 3 as well as DZ are activated after selecting the tens code number 2 1 and DZ3 switched on in the election evaluator. The relay BZ (Fig. 3) is switched on via the contacts 29 dz 1, 30 dz 2, G 5, 31 ze, G 6, 6 ie 3, 5 ie 1 . A contact of the relay BZ, not shown and connected in parallel to the contact 27 bh, controls the triggering of the selection memory, memory seeker and selection evaluator also by means of the relays TR 1 and TR in FIG. 2.

If the call station 231 is blocked, the relay C 1 is switched on via the contacts 33dz3, 32dz2, G7, 34ze, G8, 6dh3, 5dhl by switching on the corresponding identification relays ZE, DH1, DH3, DZ 1, DZ and EE1 in the election evaluator WB . Contacts 35 ce 1 and 36 c 1 switch the winding of a relay, e.g. B. Bh a, which controls the triggering of the election memory, memory seeker and election evaluator.

d) Assignment of the central control device GSt when a complete code number is selected.It is again assumed that the subscriber of a call station is connected to the house transmission HU via the subscriber circuit T1 and the crosspoints of the switching stages EK1, ZK 1 and Mk and to the house transmission via the memory coupler SK the dial memory Wh is switched on. If the selection is again an internal choice for establishing a connection, the ZE relay with the other code number relays for the identification of the selected code via contacts 1 sa 1, 8 n and 9 k ( Fig. 2) switched on in the election evaluator WB (Fig. 3).

It should also be noted that the counting chain ZK (FIG. 2) temporarily stores all the codes of the selected code in the selection memory Wla and the codes present in the counting chain coupler are completely fed to the selection assessor each time the election evaluator is requested. If, for example, the code number 210 is selected, the relays WH1 and WH 3 as well as the relays WD 1 and WD 2 and the relay EEO are switched on from the counting chain ZK 1 in the selection memory Wh after the complete code number has been selected.

When it is the turn of the voting memory finder in question, the corresponding numbering relay (FIG. 3) in the voting evaluator is switched on via the election memory finder SU via the contact 1 sa 1 and via the contacts of the mentioned number plate relays of the dial memory Wh. In addition, the relay ZE is switched on again. Relays DH1 and DH3 are switched on via contacts 2wh1 and 3wh3. The relays DZ1 and DZ2 are switched on via the contacts 37wdl and 38wd2 and the relay EE 0 is switched on via the contact 39we. The relay TD is thus switched on in the election evaluator WB in order to indicate that the first two codes of the three-digit code have been selected. The relay TD is switched on, since it is an internal choice for establishing a connection, via the closed contact 42ze. The switch-on circuit for relay TD runs via contacts 40dz1, 41dz2, rectifier G9, contact 42 ze, relay TD, rectifier G 10 and contacts 6 ie 3 and 5 ie 1.

If only the first two code digits are recorded and transmitted to the election evaluator, the relay RS (FIG. 3) is switched on via the contacts 43 ge and 44 td and indicates the incomplete selection. The memory seeker SU and the election evaluator WB are released. If, on the other hand, the selection is complete (210), a circuit for the selection relay WE in the common control device GSt is closed by closing the contact 45 td. This circuit is established via rectifier G 11, contact 45 td, rectifier G 12 and contact 46 ee.

When relays DH1 and DH3 are switched on, relay GH is switched on, relay GZ is switched on before relays DZ1 and DZ2 are switched on, and relay GE is switched on before relay EEO is switched on. The relay GE in connection with the relay TD indicates that the evaluation in the election evaluator BW in the present case is the choice of a complete three-digit code number. If the relay GE were not switched on, the relay TD would indicate that the code at hand is an incomplete code.

The activation of the relay WE in the common control device only leads to a further control if a holding circuit for this relay WE is established via a chain formed by switching contacts of function relays, the common control device is free and at the same time no priority function determined by the chain is to be carried out. This means that the common control device is assigned a chain formed by contacts of the function relays, which chain only allows one switching operation by the central control device at the same time.

By switching on the relay WE in the common control device GSt, the central control device initiates the marking of the called connection point in the speech path network. The relay KT is switched on via the contacts 47 c, 48 we, G13, 49 td and 50 ge. This marking is not shown in detail. It can be seen, however, that in the common control device in a manner not shown, depending on the election relay WE by closing the contact 51 kt via the house transmission seeker HS, which identifies the occupied house transmission, and by closing the contact 52 kt in the subscriber line finder, via the election evaluator the contacts 53 ie 3/54 ie 1, 56 dz 2/55 dz 1, 57 ee 0 the relays H 2, Z 1, E 0 are switched on, which identify the selected connection point. The connection path to be switched through is marked by means of the in FIG. 2 path searcher shown WS.

The route search is necessary to find the free intermediate lines for the connection to be established. Depending on the finding the free connection path, d. H. the free intermediate lines become the paths who have access to the selected extension.

After the selected connection point has been marked, the relays TR 1 and TR in FIG. 2 switched on, so that the selection memory Wh, the memory seeker SU and the selection evaluator bYB are released.

The free-busy check of the called connection point is carried out using of the relay CP and other relays, not shown, from the common control device GSt off.

From the foregoing it can be seen that a digit multiple Z2 the dialing codes mentioned and the characteristics of an operating state of Connection path corresponding switching means of the central facility switched on , which via a central correction field a corresponding to the operating status Operate the function switch.

The dialing code and the operating status of the connection path corresponding function relays switch in the central facility during the connection with a common control device switching means of this device for identification a calling or to be called intercom station via the second multiple digits Z 1 for marking the connection path to be switched through and a transmission a.

The processes that are controlled via the digit multiple Z 2 and the digit multiple Z 1 are described above for the election evaluator WB. It can be seen that in the case of incomplete dialing, blocked codes and unconnected subscribers, the election evaluator only works on the digit multiple Z 2. It can also be seen that the election evaluator only works on the digit multiple Z 1 if there are indicators which allow the setting of a connection path to the desired connection point. On the basis of FIG. 4 further switching operations are described.

e) The identifier TS controls the subscriber identification for outgoing connections (connection to the transmission) All call incentives from intercom stations are given by subscriber relay contacts to the identifier TS, which at the same time only identifies one intercom station through a correspondingly known chain connection of the contacts of the identifier relays and thus via the contact 12S gse requests the central control device GSt for only one intercom by switching on the relay EB.

The contact 126 gv is in the rest position and the relay EB is switched on via the winding I only when the central control device is free. When there are multiple requirements for the central control device GSt by different devices for different functions, eg. B. End of dialing, transferring, further function relays WE and UM are switched on. In this case, the chain of changeover contacts 127 eb, 128 um, 129 we decides which function is preferred, ie which of the switched-on function relays EB, UM, WE is held. In the exemplary embodiment, this is relay EB. The relay GV is also switched on in the holding circuit. The contact 126gx marks the control device GSt as occupied. In the only indicated way, the contacts of the relays GV and EB control the transmission of the identification of the calling point from the identifier TS via the digit multiplex Z 1 to the subscriber connection switch TA, which marks the connection path to be established between the calling party and a free house transmission via the route network WN under i`r.tüfeuahme of the house transmission seeker through the contact 130 eb controls.

It can be seen from your foregoing that the identifier TS inxmer when the central control device GSt is ready to control operations via the Multiple digits Z 1 can make. This means that the election evaluator in such Tax operations can evaluate unhindered dial indicators that are not used for production of connections can serve.

It should also be mentioned that the above processes on the basis of F i G. 4 are explained, but also partially the F i g. 2 and 3 can be found.

f) The identifier ID controls the recoupling when transferring the identifier 1D's job is to get the incentives going backwards from transmissions if corresponding control states are present in the central control device GSt included. This inclusion consists in the identification of the coupling stages connection point associated with the relevant transmission.

If an indicator to initiate the transfer is received from the transferring, ie inquiring office or from the accepting, ie inquired office, a connection with the central control device is initiated via the transmission seeker AS when there is an inquiry connection in the exchange transmission AU. The relay UM is switched on via the winding I and held via the winding II if there is no preferred request. The switched-on relay GV identifies the central control device GSt as occupied with the contact 126 gv , the relay 1d is switched on via the contacts 131 gv and 132 um to control the identifier of the inquired office connected to the exchange. For this purpose, a marking circuit is closed by the contacts 133 id and 139 id, 136 id via the transmission seeker AS, the transmission AU, via the coupling stages and via the identification relay of the identifier 1d.

The actuated identification contacts of the identifier control the identification in the subscriber line switch via the digit multiple Z1 by closing the contact 136 id. The subscriber line switch TA connects the requested point to the transmission AU via the route network WN and the transmission seeker AS with the appropriate authorization identification of the queried part via the authorization wiring BV and switching on the relay BA when the contact 137ba is actuated.

It can be seen from the foregoing that the central control device also initiates the marking of the connection paths to be established via the digit multiple when corresponding switching operations are present, independently of the central election evaluator WB. In this case, too, the central election evaluator can work independently on the second digit multiple Z2.

The central control device also works for other functions, such as allocation of connections, call forwarding by day or night, for night service, inquiry initiation, allocation of dial memories via the memory finder etc., regardless of the candidate.

Claims (6)

Claims: 1. Circuit arrangement for a centrally controlled telephone private branch exchange in which a. Identifier identifies the calling stations and the dialing codes of calling stations are transmitted to a central election evaluator, and by means of this dialing evaluator the characters corresponding to the dialing codes switch on the devices for setting the connection path, characterized in that the identifier (TS, 1d) the code for a calling station transmits via a first digit multiple (Z 1) to facilities (TA) for setting the connection path and the election evaluator (WB), who receives the dialing code via a second digit multiple (Z2) and evaluates each of these codes, only after recording one for the next Connection establishment usable code combination by means of the common control device (GSt) via the said first digit multiple (Z1) transmits the characters corresponding to the dialing code to the devices (TA) for setting the connection path. 2. Circuit arrangement according to claim 1, characterized in that the identifier (TS) for the call incentives of calling stations and the identifier (1d) for stations connected with transmissions via the first digit code to devices (TA) of the connection path as a function of function relays (EB ; UM) transferred to the central control device (GSt). 3. A circuit arrangement according to claim 1, characterized in that a dial memory (Wh or Wa) transmits the characters corresponding to the dialing code together with the connection status (connection establishment) corresponding characters via said second digit multiple (Z2) to the central election evaluator (WB) , the evaluates the received identifiers via a central marshalling patch panel and, if there are identifiers that cannot be used for further connection establishment, transfers control characters to the dialing memory and, if there are identifiers that can be used for further connection establishment, by means of the common control device (GSt) via the first digit multiple (Z1) the dialing identifiers controls corresponding characters to the facilities (TA) for setting the connection route. 4. Circuit arrangement according to claim 1, characterized in that with simultaneous request of the central control device (GSt) by the identifier (TS or 1d) and the central election evaluator (WB) to initiate the connection via the first digit multiple (Z1) and the facilities (TA) for the setting of the path different function relays (EB, UM, WE) of the central control device (GSt) via a separation contact chain (with changeover contacts) the preference of a setting process is controlled. 5. Circuit arrangement according to claim 2, characterized in that the election evaluator (WB) when recording certain combinations of indicators via the central control device (GSt) and the route occupied for the connection establishment (z. B. Office transfer seeker AS, office transfer AU, coupling stages MA, ZK 1 , EK 1) an identifier for the special identifier (1D) is given, which identifies the calling station, and that the identifier (1d) transmits identifier to the devices (TA) for establishing the connection path via the first digit multiple (Z1). 6. Circuit arrangement according to claim 1 to 5, characterized in that the identifier (TS) for calling points in the case of call incentives, the identifier (1d) for the identification of calling points in particular by the election evaluator (WB) marked states in the occupied for the connection establishment Transmission and the election evaluator (WB) via the first number multiple (Z1) control the connection of calling or to be called locations with transmissions (HU or AU) that are to be assigned for the connection establishment.