CH631852A5 - Circuit arrangement for identifying connection elements in telephone switching systems - Google Patents

Description

The invention relates to a circuit arrangement according to decentrally controlled exchanges, such as. B. EMD preamble of claim 1. Represent in telephone exchanges, the identification of the respective systems are used to enable identification devices within calling subscribers. In addition to installation in a switching center, the identity of a switching center that has been reconfigured in a switching center can be equipped with a simple connection process, a way of retrofitting an already existing switching center, a line or, quite generally, a connection location. This is necessary, for example, to determine ganes and to determine the assigned identifying number for the fee entry instead of the one-person principle. It is known that such identification subject counting the multiple count is to be introduced. If the existing system does not provide a relevant counting current with the help of a transmitter sent by an identification device and less than 60 channels are provided via the connection section that has already been set up, the information signaling device required to register and interpose an identification network to identify the charges per subscriber must be retransmitted to the office to which the relevant central office is responsible. As a means of identification, the speech charge computer can be assigned locally, transmitted, veined or the control wires of this connection section used. The identity of the calling part is therefore used for this purpose. This depends on the ability of the identifier to be influenced, the connection destination and the duration of the call to be verified by processes on the lines and also by recording. Using the exemplary embodiment, the influence of the identification signal used on the switching means coupled to the functional sequence in the identification of a calling sub-line is described below. In the mentioned taker described by a central facility. The

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The calling subscriber in question is to be connected to the assigned line set for each connection. Each application production is checked for its authorization for the respective connection of these addressing lines in the relevant line binding. Set to that input of the gate circuit Gc and Ga, In that outgoing from the first group selection stage IGW which is not coupled to the control or speech wire. Wei trunk line bundle is line-by-line, each line is connected to a winding end of the relay ID, loop LS set. In a replica in existing This relay is one of several existing in the wiring harness, so these wiring harnesses on the intermediate distributor NEN bistable relay and is used when it is activated in the lines between the corresponding outputs of an identification circuit. This relay first group selection stage and the outgoing transmissions could also be inserted through an appropriate electronic shell. io tung to be replaced.

From the subscriber station Tin, the line set LS can be assigned to the subscriber circuit TS, the call finder stage AS and the and the associated potential shift on the line section LI if the line set LS is assumed to be occupied. The line set is during the c-wire now arises at the output of the gate circuit Gc of establishing a connection and during the period of time signal if the individual's existence is confirmed in the course of the cyclical activation. A greater number of such connection points is provided by the counting device ZR of the line sets, a group of line set connection points AZ receiving an addressing signal. The output zen, each with an incoming signal of the gate circuit common to this group, is connected by a corresponding circuit identifier processing and control commands to Lei receiving arrangement ER of the device RP device set transmitting device RP communicates. and a connecting line L2 is connected via a read-in unit, which is indicated by the arrow e on the output side of each line set and is also controlled by the counting device ZR. The one written into a storage device Sp. The instantaneous processor RP implemented with register function has the counting of the counter indicates from which u. a. the task of recognizing and storing certain switching states in the line sets of line sets which operate the device RP, this zen, this recognized switching signal originates. The storage device SP can be individually processed and logically linked in several identifiers for carrying out a dialogue with other users. External storage units divided. On the basis of the information it receives from the recognized signals of the respective control line e, the occupancy-led indicator received via the line set and from it from other devices, a line of information multiplication, is now assigned control commands, for example, to individual signals in the signal in question Assigned to the line set and in the line sets existing control or switching elements designated 30 with the position a to deliver elements. The gate circuit Gc is next for this Lei-

When assigning a line set due to a set of pending polling requests and binding request by a subscriber Tin is not delivered in, since a re-assignment is required, a more closely illustrated output signal, which also speaks from the device via a test and occupancy circuit the occupancy or tax wire c closed. In the Lei 35 RP is registered. From this device, however, line LS is still the lines a and b one then a corresponding signaling the occupancy

Speech wire pair indicated. The issued with the occupancy of the Lei request signal, if on the basis of the identification set to be performed, ie. H. the ascertained results of the two successive calls of the calling subscriber and the pertinent interrogation processes, a matching interrogator, if the evaluation of his assigned subscriber result was ascertained. For this purpose, the class is now carried out as follows: first query process stored in the storage unit a

The result of the reassignment of the wiring harness on the c-wire via the potential shift also occurring from the counting device is evaluated as a signal by the reading device L of a wired gate circuit Gc which is coupled to it via line 1. This is supplied to DC circuit Vg. At the same time, this always receives the register processor RP for further processing. The comparison circuit is supplied with the signal present at the time of the following device if the signal present at the other input of the gate circuit. That a corresponding addressing signal is applied in association with this. The result of the temporarily stored line set is the same. The same applies to the gate circuit Ga, via which the corresponding coupling with the line a is transferred to the comparison circuit through the instantaneous count setting.

Speech wire pair switching states registered on this wire 50 If a match determined by the comparison can be made. These switching indicators to be registered between the two query results and in the event of inequality can be, for example, dial pulse symbols, by means of which the number of the called party can then be determined in relation to the result of these two query processes. For the previous query process, the common

Transfer of the switching device to be queried via the gates, the same device RP, that there is actually an assignment to the register processor, as indicated in the figure, 55 and that there was not just interference, the information multiple IV leading to it. In the manner described, more is set as two query

In order to record and process the information processes in relation to one another, the security for the signals transmitted multiple times can be increased, which includes a group identifier. After the detection of a device RP shared by line sets with the assignment, as indicated in the figure, a signal which characterizes this state is applied to the line AF counting device ZR functionally coupled memory arrangement 60.

voltage SP. Through the device RP you can now in the same way

This counting device in the common register pro- as well as the described detection of an assignment also other processor now switches an addressing signal to the individual switching indicators processed or processed in it in a cyclic sequence and predetermined smooth time intervals arriving or passed on in the line set LS, the number of connected cable sets overnumbered 65. For example, the matching connection points on wire a could be. Each of these connection switching states by querying the gate circuit Ga points, of which only the connection point AZ shown is determined and stored in the device RP. Off is then the comparison of successive query results via a corresponding addressing line AD

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the start or the end of a switch label can be determined - the new assignment of a line set can be determined by querying the. corresponding occupancy vein was registered. As soon as

The frequency of the respective interrogation processes for one of the counters ZR and the count-determined line set corresponding to this line set is selected so that the switch position is reached. For reasons of simplification, the switch 5 z which is safely represented as a symbol with the shortest duration is closed in any case , can be recognized. The relay JD can, because of the addressing

If the calling subscriber is to be identified with every potential new line set, the calling subscriber should respond.

this assignment, as already explained by the determination of the relay JD should be addressed during the entire course of the resulting potential shift on the allocation "> requested identification process and or control wire c by the corresponding line set, for example with the transfer of the obtained identification correspondent The device RP has been recognized and if an occupancy result has been found at the processing unit processing this result, a corresponding identification requesting device RP will be switched back to the initial state, a signal will be generated and an input of the gate circuit Gi will be generated via the request line AF by the actuation of the relay contact id At the same time, an identifying circuit is now activated in a preparatory manner. The contact that is common in the several line sets LS - contact idz in this identifying circuit is a device RP by a corresponding A. Storage of permanently assigned central contact and it is controlled in such a way that which newly assigned line set requires the identification, that it is to be assigned to the RP signal during the active phase of the device and that it is closed only for this line. Before actuation of the relay ID can be given to the gate circuit Gl by sentence. The re-assignment of the identification identifier formed in each case when the reception circuit E of the central identifier is checked, whether the intended identification path is potential-free, is never shared by all devices RP, as is required with contact id still open. If centrally located identification device IDZ were registered and this was not the case, the subsequent functions associated with this could be triggered by this fact. A malfunction can be detected for this identifier. With the actuation purpose, the existing devices RP 25 of the relay ID in the relevant line set must first be assigned to the presence of specific line sets - by the receiving circuit of the identifier for one of the request signals. In order to make this task possible at a certain time via the now closed contact id, the central identifier must be registered with a counting occupancy potential. If this is direction ZI equipped. This counter does not indicate the case for each of them, so that a device RP to be checked can be identified as a fault and an assigned output 30 can be identified. Will the proper closing of the contact, of which only the exit AG is indicated. If id is determined, then via the receiving circuit E the sensor can send an addressing signal via the output assigned to a set-up device S which supplies the identification signal to be applied to device RP, so this address is sent to the contacts idz and id containing identifying circuit siersignal be individually effectively switched on via one of the devices concerned. By measuring the potential-assigned addressing line to the other input of the 35 tial status of the transmission line, gate circuit Gi can be determined. If it is up to the request line whether the input of this gate circuit connected to the sequence of an identification process AF has no identification to be carried out and the switching through of the path is related to the request signal, the central identifier commands are properly carried out.

when querying the relevant output of this gate. By dividing the identification path in the fault

circuit via the corresponding addressing signal, no identification trap, better fault localization and thereby a decorative request signal from the device RP in question. Possible in more targeted error handling. It is no longer possible in such a case that the entire identification device in the identification device is blocked directly by the counter ZI contained in its function IDZ to the next, the faulty contact.

Subsequent device RP assigned counter output Based on a corresponding program control continues. In the 45 initially addressed via the counter output AG, the transmitter S now initiates the central identifier, the addressing signal is thus switched off, an identification pulse of, for example, 1 ms duration is deducted and sent to the subsequent, another group of bodies.

Establishment rates common facility over a corresponding- For reasons to be explained later can also be created with appropriate management. a pause distance of 1 ms more, for example

If the counter ZI of the central identifier emits a 50th identification pulse in a periodic sequence, who reaches the counting position, in which a device RP with one. The signal emitted by the transmitter can represent a sinusoidal voltage signal that is outside the corresponding request signal at the request line of the listening area, AF is pending for interrogation, then it arrives at the output of this alternating voltage signal can be assigned via the contact id-related gate circuit Gl in association with a new potential-free Control wire c can be fed. This results in the line signal present via the central line, which is actually an identification signal with the sinusoidal voltage Li to the receiving circuit E of the central identification of e.g. B. 20 kHz modulated direct current signal. On decorating device IDZ. The line Li branches out on the basis of such a signal and there are optimum transmissions from this receiving circuit E to all of the central identification properties via the selected identification path. RP operated facilities. Immediately after the identification path runs from the transmitter S, the reception of the identification request signal by the central identification device IDZ, via the multiple circuit E, the counting device ZI is stopped by a shared register processor RP and corresponding control signal. The counting device by means of the actuated contact id in the relevant wiring harness remains in the position reached until the required identification has been completed via the control wire, for example the c-wire of the assembled gear. Connection path, the participating circuit TS of the

Already with the determination of the subscriber calling for identification 65, via a device CE and the signal with signals from the device RP, a way was prepared for the line provided with the reference symbol K to an identification signal to be sent. This was done by switching ES the central identification device. Since the addressing of the relay JD in that counter position is avoided when using the speech wires as an identification path,

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the identification process can thus be carried out by certain participants. Such impulses derived from interference voltages cannot be influenced. When a 20 kHz signal is selected, as will be described later, in a received AC voltage signal as a modulating signal, the tendency towards the central identification device JDZ is suppressed, for coupling to adjacent lines, however low, interference voltages, for example due to counting pulses, can still result in a permissible interference voltage tolerance not over 5 or by signal change on the wires, which is stepped through the selector run. In addition, there is no influence on the conditions that are triggered. The connection point which is directly duel specified via the subscriber individual by means of a corresponding counting device, for example a fourth billing performed at the subscriber. The current subscriber number appears for each of the correspondingly programmed controls in the Hun. The group of participants grouped together can be provided according to the introductory option for the keying of the transmitter S present in the identifying device of an identifying process at the output of the coding device shape. If W for each position of the subscriber number is in one, see the selected roof width for the transmitted interchangeable code. If this monitorable code represents a 2-out voltage signal, a frequent disturbance of the identification code, 5 gears must be set for each position, this could be excluded by selecting another subscriber number belonging to this group, i.e. roof width will. 15 of the ones, tens, hundreds and thousands digits five off. Separately there is now a connection for each participant. From these outputs assigned to the individual points of division between a subscriber-specific connection point, subscriber number, two outputs signal then each lead and the CE designated and still to be explained in the undisturbed operating case. The respective coding assembly. These subscriber connection points are a hundred subscriber numbers of a coding unit W where the subscribers are concentrated in terms of circuitry. 20 by individual coding, each having ten connections. This is, for example, to be regi-coded on the call finder selection stage AS or preferably in integrated circuit technology on the subscriber-specific counting devices Za. The coded output of the relevant part of the subscriber number to be taken into account for an existing connection is present in the coding module CE for 100 subscriber counting pulses. Is no continuous mer symbolically represented by the device W. The toe control wire is present, so the alternating current circuit 25 is the one and one digit is determined directly from the circuitry between the group selection stage, for example the IGW stage of the inputs of the device W. The hundreds and the call seeker selection stage AS of the capacitor C1 require the thousands digit due to the hardware circuitry. If one were to use a pure direct current signal as an identifier of the individual coating assemblies, for example by means of the decorative signal, additional problems with the group would be determined for a switching system to be specified for a similar corresponding wire bridge. The within the individual coding assembly circuit of the relevant identification circuit. In the exemplary embodiment serves as a subscriber-specific transmitter point is indicated by the arrows Hv and Tv. Each connection point for connecting a coding module CE output of the individual coding modules CE is a driver - in each case the input of the counter Zä. Downstream through the TR level. The individual assemblies are made at capacitor C1 via the aforementioned selection levels, the coupling of the choice of the respective meter input as participant identification of the c control wire with the connection point duel to the metering devices directly at the respective metering meter wire z. frames arranged. On the basis of this decentralized connection, the respective individual connection points are assigned coding, so that for each subscriber connection, the meter connections of a maximum of 100 subscribers are not routed to one wire between the relevant meter frames and the coding module. Required for an office of 40 identifiers, for example. The coded subscriber 10,000 connection units would therefore be 100 such numbers when using a 2-out-of-5 code through coding modules. For each group of hundreds of a 20-pair ring cable to the central identifier participants, the relevant device will be transmitted in the CE module. In the event of a subsequent retrofit, the subscriber number is generated in coded form. For everyone with an existing office, the assembly effort of the CE coding module individually coupled counter is very low. Thanks to the modular structure of the coding assembly, consisting of capacitors C2, C3, the mer group, resistors RI, R2 and the Schmitt trigger ST, there is an optimal adaptation to the existing switching input circuit . This input circuit has the possible size of the unit. The 20-pair ring cable K is a protective function for the subsequent electronic coding via a corresponding multiple with each of the coding modules W and at the same time serves as a filter for interference voltages. 50 pen I of which only the coding module CE is shown. The capacitor C2 suppresses high-frequency interference peaks. connected. For each place of the coded participants - At the same time, the earth capacity of the from the subscriber number will normally lead to a signal. This connecting circuit TS to the counting device Zä can enlarge a half-wave cable deformed into square-wave pulses, so that overlapping of the identification waves of the alternating voltage used for modulation to adjacent wires is greatly reduced. Over 55 set signal from z. B. 1 ms roof width. The capacitor C3 is the DC separation of all decentralized coding modules linked to the respective input from the counter wire z. Furthermore, ring cable K leads to the reception circuit ES of the central one by dimensioning the capacitor C2 and the identification device IDZ. In relation to each wire of the ring resistor R2, the input is designed as a high-pass cable, so that the pulsed identification signal can carry, in that AC signals with a frequency that is less than 60 receiving circuit as a receiving element and as a comparison element, the frequency of the formation of the exclusive OR gate V which serves to identify the identification signal, an alternating voltage which is turned from the resistors. Schaltim- R3, R4 and the capacitor C4 and the diode D existing pulse on the counter wire are formed by differentiation to defi-integration switching element J for delayed evaluation of the narrowed pulses. With each positive output signal of the comparison arrangement V, as well as a signal change at the input circuit of a coding 65 memory element ZS available. An impulse is generated for one core of the ring cable group. These are represented by the size of the capacitor K. This is possible for all coding sensors C2 and the resistor R2, and through the ring cable common for the modules, since the individual Schmitt trigger ST predefined threshold voltage does not determine the identification requirements at the same time but

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are processed one after the other, so that the information transmitted in coded form via the ring cable can be clearly assigned to a single subscriber line.

The respective reception signal for the reception circuit ES is compared in the comparison circuit V, which can be an exclusive OR gate, for example, with the transmission control pulse emitted by the unit ST. Apart from runtime differences, its identification pulse may only be registered in the receiving circuit ES as long as the transmitter S is keyed by a corresponding pulse. During the temporal correspondence of these pending signals, no signals are generated at the output of the exclusive OR gate, but signals of this type only occur during those times in which the corresponding difference signal comes into play due to the transit time differences. The subsequent delayed time evaluation is selected such that it is greater than the time duration of a difference signal in relation to an undisturbed sequence of such an active wire channel. There is thus no control signal for the memory device ZS connected downstream of each wire. This fact is then evaluated by the respective memory device, which can be a bistable flip-flop, for example, as a statement of an existing identification signal. If the wire does not carry an identification signal, then a difference signal is produced at the output of the comparison circuit V, which overcomes the response-delayed evaluation, so that due to this fact the lack of an identification signal is written into the respective memory device ZS. The delayed evaluation can be designed so that a delay occurs both on a rising and a falling edge. In addition to the described evaluation of a useful signal, the narrow pulses formed in the respective decentralized coding module from the switching pulses that occur are also suppressed. On the basis of an identification pulse emitted in the manner described, the subscriber number is also buffered separately according to the individual digits in the memory devices ZS assigned to each wire of the ring cable K, likewise in the monitorable 2-out-of-5 code. The result of the identification made on the basis of the transmitted identification pulse when the 2-out-of-5 code and a four-digit subscriber line number is required and stored in 20 bistable flip-flops can now be adapted by the storage and control unit MC, which is designed as a microcomputer, to the central identification device IDZ the possible input bit width is read out serially and transferred to the memory unit SE. For this purpose, the individual digits of the stored call numbers can be addressed separately by the unit Ad of the microcomputer MC. The coded address is received by the address decoder ADR via a corresponding addressing line. It then applies to the combination of five gates assigned to the address the total opening potential corresponding to the number of buffers of the existing gates G1 to G20. In this way, the digits of the identified subscriber line number that are partially stored in the individual buffers can then be transferred to the storage unit SE. A check is now carried out to determine whether an identification signal has occurred on the information stored, assuming a 2-out-of-5 code, on more than two wires for one digit. Such a disturbance can be triggered, for example, by an improperly running of a voter, for example by briefly bridging two steps, which enables an identification signal to be transmitted to other wires. A signal can therefore also appear on a channel that is passive per se, which initially as

Identification signal can be evaluated. Such errors can be identified by code monitoring. If such an error is signaled by this code monitoring, the identification process initiated on the basis of the identification signal must be repeated.

If the code monitoring is activated, the identification process must be repeated in every case. However, even in the case of a positive test, if no such disturbance can be identified in the result triggered by an identification pulse, the result of several identification processes is used to form a final statement. First, the identification result delivered by an identification pulse is transferred to the storage unit SE. This result stored in the 2-out-of-5 code used is then compared with the identification result obtained by the subsequent identification pulse. This can be done in a manner similar to that described in the comparison made in the device RP of the result obtained from two immediately successive scanning pulses. For example, a corresponding evaluation logic can stipulate that two successive evaluations must produce the same result. Another possibility is to stipulate that, for example in the manner of a majority decision, at least two results of the evaluations derived from three individual signals must match. When evaluating the result delivered by an individual impulse, the pause following the identifying impulse can also be included in the evaluation. The individual identification pulses on which the evaluation is based can be generated by, for example, pressing the transmitter S in a 1 ms cycle. As a result, 20 kHz pulses with a 1 ms duration are then applied to the prepared identification path, each separated by a corresponding pause of 1 ms. A pulse series of at least three pulses could also be emitted as an identification signal, which are then evaluated in total in the manner of a block formation.

If the result of the initiated identification has been recognized as correct by comparing individual identification processes and the code monitoring, the determined telephone number is written into the output buffer memory A of the central identification device, possibly with the addition of an outside line and area code. The class assigned to this subscriber can also be determined for the subscriber connection determined. This is done by querying the class memory KL which contains these features and which is stored in the microcomputer unit MC. This memory can be queried directly with the subscriber line number resulting from the identification as the memory location address. For this purpose, the subscriber number present in a 2-out-of-5 code is converted into a BCD code which enables control within the microcomputer unit. This conversion carried out per digit is to be carried out in unit U using a corresponding table inscribed therein. For example, a participant can be assigned the class "not authorized for remote access" or a class "not authorized for international access". Another possibility is, for example, to set a privilege, which states that in the event of a traffic restriction due to a catastrophe, the subscriber concerned will be able to establish a connection. These examples named as class characteristics are representative of a large number of possible participant classes.

The data stored in the output buffer A of the central identification device, that is to say the identifiable information supplemented by the outside line code, can now be transmitted via the data line DL.

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Ornate phone number and the associated class, to which A3 is indicated, are to be registered by means of a device RP scanning originally requesting this information in a staggered manner in time. The result of a scan will be transmitted. The recording and further processing operation is stored according to the last look principle and this information in the device RP takes place with the result of the subsequent scanning operation comparing the adaptation circuit A. This information. It can now be stipulated that the identifiers can now be transmitted by the device RP to a superordinate result if the results of two mutual office are matched. This may have to match, for example, in the subsequent scans or a total of three scans to be assigned to one another by a multi-frequency code by this device. Another possibility, which controls and transmits the transmission of this information, is to be carried out by means of a corresponding device (not shown). After processing, a positive statement about the identification of an identification process is to be made after the majority decision in an ornament (not shown). So voices are given a reset signal to the relay ID, whereby, for example, when the individual pulses are scanned, the contact id is opened. In order to process a further line b the results of the scanning of the first and the third identification request, the query of a pulse, i. H. So the results AI and A3 match and that

Group of line sets common device RP is the result of the sampling of the second pulse, that is, the set. Result A2 is different, so can be from identity

This transfer of the above-mentioned information to an overall result AI and A3 to a properly organized central office is closed, for example, during the identification process and the associated re-registration is output using the so-called toll-tocketing-procedure result. The sampling of each is required. In addition to the above-mentioned information, 20 wires of the lead to the central identification device are switched on by the device RP, the common ring cable and the respective evaluation can be binding data, eg B. Data on the time of arrival of the registration number by the microcomputer present in this facility, d. H. to be controlled over the beginning of.

Call connection and data in the same way. In the diagram after line c, an individual evaluation

End of this call, d. H. transmitted on arrival 25 ting according to the principle of potential comparison carried out a trigger or closing sign. Be in one. An identification pulse and the central data storage device transmitting pause, which is connected to the superordinate office, each form an identification signal. All of the individual conversations relating to the continuous transmission of these identification signals can then take place. Data are stored and at the given time the result of the pulse and pause output device is to be made available. 30 inclusive evaluation with the result of the evaluation

In FIG. 2, in lines a to c, three options for the subsequent pulse and pause are also compared, the coding of a transmitted identification signal and the closing signal. In the example of the relevant evaluation option for this signal according to the diagram in line c, the result A2v of is to be shown. deviate from the previous result Alv. This is in the

According to line a, a series, in the 35 diagrams by the crosswise deletion of the case shown in the case concerned, a series of three identification pulses should symbolically represent the result A2v as the identification signal. These identification pulses are simplified as rectangles. The results of the three following evaluation pulses are shown. The impulses of each impulse group are now compared, ie the result of the evaluations A3v to A5v overall with the corresponding control impulses, can be properly based on this identity. This potential comparison carried out for a 40 sequence of the requested identification closed and that

Group, d. H. The total evaluation for the result relating to the pulse series is written into an output memory and is indicated by the reference symbols Vgl and Vg2. Be true.

the result of the analysis carried out after the first pulse series. The examples shown in FIG. 2 can be used for evaluation with the result of the coding of the identification signal after the second pulse transmitter, with regard to the analysis carried out for the rie, ie the results Al g and 45 analysis At the time and with regard to A2g, this can be interpreted as the proper course of one of the evaluation of the result in another identification to be undertaken, and that the result as compared to the one shown can be combined with the result ascertained for later forwarding to a requestor . a. For example, it is possible to save the individual evaluation according to the device in question. to base line c on a majority decision and /

According to line b, individual pulses 50 or to provide a scan for the result determination should be evaluated as identification signals, which, as indicated by the reference symbols AI to

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2 sheets of drawings

Claims (5)

631852 2 PATENT CLAIMS known process that uses a control wire as an identification path 1. Circuit arrangement for identification of each used, serves as an identification network a connection elements involved in a switching process from toroidal cores, built-in evaluation field or z. For example, an identification network of the identification request signals used in telephone exchange 5, which is built up using magnets, in particular subscriber connections, on the basis of corresponding core transistor modules. A pure direct current system is used as the identification signal, with the identification signal transmission pulse being used for a circuit test, which pulse is fed with a high level in the predetermined switching means in connection-specific switching devices identification path. In this known identification are provided, the identification signal via an already fizierprinzip never run multiple identification processes at the same time-established connection path to a tig in question and it is whenever it is necessary, connecting device individually assigned device and io identification prompted. A new identification is only carried out after a request has been completed there via a delivery address for this connection element. If an electronic device with a high-signal device that uses the ID-ohmic input is now to be transmitted as the identification network to a device that transmits the identification-identification network, an identification signal offers a result of the evaluation and transmits it, which means that it does not provide sufficient detection security with high energy , characterizes that in order to deal with one and the same identification 15 It is the object of the invention, in such a case, to request an identification signal transmitter (S) perio- with an identification signal with a low feed-in level, the successively several identification signals providing complete identification security guarantee. det, each of which causes an identification process, this is achieved by the measures specified in the characterizing part of the patent that the duration of an identification signal is achieved at least from claim 1. Pulse time and the subsequent pause time 20 Depending on the absolutely necessary security of the evaluation of an identification pulse, there is a reception circuit, the identity of a predetermined number of results is provided which requires the periodic occurrence of an identification. The coding of the identification signal can determine the identification result and only if there is agreement in that a series of identification signals is sent out-evaluation of several successive identifiers, which are then evaluated in total and co-signals the result of the identification process to one after - 25 are related. Another possibility of the orderly facility for further processing. Coding consists of evaluating the individual impulses for yourself. 2. Circuit arrangement according to claim 1, characterized in that the respective individual evaluations are drawn together in that a comparison device (V) is used to establish the reference. Compared to the first-mentioned possibility of periodicity of reception lines corresponding in terms of time, this results in a shortening of the evaluation time. However, there are staggered samples. 30 several individual evaluations required, of which e.g. B. the 3. A circuit arrangement as claimed in claim 2, characterized in that at least two immediately match one another so that the comparison device (V) is required to determine the following evaluations. It is also possible to compare the periodicity with a static potential comparison of the B. three identification signals, the evaluations according to the captured identification signal are evaluated with a transmission of this majority decision. Signal controlling impulse. 35 The determination of the periodicity can be 4. Circuit arrangement according to claim 2, characterized in that the scanning is staggered in time and which identifies the identification signals, that the comparison device (V), as the identifier leading and connected to the receiving circuit, carries out a group of several immediately successive sequences. Another possibility consists in evaluating a series of identifying pulses, the comparison of the table potential comparison of the received pulses or the total evaluation of the group of pulses forming the received group of pulses with which the transmission is the giving. identification pulses associated with an identification signal 5. A circuit arrangement as claimed in claim 4, characterized in that the pulses are controlled. that the identification signal transmission device (S) in the following is based on a in the drawing an exemplary embodiment shown for the sum evaluation of a fault signaling described the difference the pulse group sends out again. 45 FIG. 1 shows, on the basis of a functional block image, the basic circuit structure when carrying out a necessary identification. 2 shows pulse diagrams of possible codings and the associated evaluations. 50 The embodiment of FIG. 1 serves u. a. to, for