CH631586A5 - Circuit arrangement for identifying connection elements in telephone switching systems - Google Patents

Description

The invention now also relates to a circuit arrangement 55 for identifying connection elements on the basis of corresponding identification request signals in telephone connections.

Identification devices in telephone switching systems, wherein an identification signal via the constrict serve to within a switching center the identifying switching element and the already established connection of a participant involved in a switching process to a mer connection, a transmission, one individually assigned to the connection element Management or whole 6o facility, e.g. B. subscriber line circuit and from there generally a connection element to determine and the associated via identification network for the transmission to determine the identifying number. In addition to the fulfillment of special signaling devices, this is transmitted, e.g. Identification of registers or other peripheral identification results of the fee allocation and / or facilities upon request by translators or or in connection with selection information of the authorization-like central units is an identification in particular evaluation based on stored participant class characteristics for classification and authorization determination and for male purposes.

the assignment of the call charges incurred to individual. It is the object of the invention to require an identifying device subscriber lines. to create, in which the to be provided for an institution

Requirements with regard to the possibility of expansion and the speed of work are optimally met and which, in particular with regard to the subsequent installation of such identification devices in existing switching centers, permit a favorable use of the available space with an overall very small space requirement.

This is achieved in that, as the identifying network which supplies the subscriber line number directly in coded form and is arranged in a decentralized manner and is coupled to a group of subscribers in a predetermined number and is integrated in integrated circuit technology, within the individual subscriber groups each subscriber-specific connection point, each with a permanently assigned input, is available Coding unit is coupled that the functional sequence assigned to the individual program steps is effected by a central evaluation and control device which is common to all coding units and which processes their output information in each case and contains a memory for instructions and data, a logic processing unit and input and output elements.

According to the invention accordingly by a certain number of connection units, for. B. 100 connection units, assigned coding modules a direct coding of the subscriber line number concerned instead. It is advantageous to use integrated modules for this. It is also expedient to spatially accommodate these units where there is direct access to the subscriber-specific connection points, for example at the location of the subscriber-specific counting devices. By arranging these coding units in groups, any adaptation to the respective number of participants is possible, so that expenditures for devices that are not initially required are eliminated. Due to the decentralized coding modules, all modules according to a further embodiment of the invention only require a ring cable, the number of cores of which is sufficient to transmit the coded number. Accordingly, a wire between the subscriber-specific connection point, for example the relevant meter frames and the identification device, is not required for each subscriber connection. There is the possibility that, in the event of an expansion, the additional coding modules are connected directly to the existing ring cable leading to the central control device. Since the individual inputs are each permanently connected to a line-specific connection point within the individual coding modules, this exclusively static conversion results in an interference-free arrangement compared to a conceivable scanning process.

Furthermore, there is the possibility that due to the identification signal arriving at the input of the coding device corresponding to the calling subscriber via the already established connection path, the numerical value corresponding to the individual digits of the subscriber connection number is converted into a monitorable code and is fed to the central control device for further processing. If, for example, a 2-out-of-5 code is used, all that is required for a four-digit number is a ring cable with 20 wires, which is routed to a group of ten thousand, assuming a group of hundreds, for each coding module over 100 of these modules.

This applies on the condition that the individual digits of the connection number to be identified are transmitted in parallel to the central control device. To determine certain authorizations of the participants, there is the possibility that a class memory, which is a memory area of the memory contained in the central control device

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forms and in which the subscriber classes relating to the subscribers are stored, with which the subscriber line number representing the identification result is queried as the memory location address.

According to a further embodiment of the invention, each coding unit is only released for the duration of the respective identification pulse. This results in a partial elimination of interference in the decentralized area.

If the central control device is implemented by a microcomputer, in addition to the price advantage there is also an optimal adaptability with regard to the change in data relating to the individual participants.

In the drawing, an embodiment of the invention is shown, which contains only the essential components that contribute to their understanding.

The embodiment of the figure serves u. a. in addition, for decentrally controlled exchanges, such as. B. represent EMD exchanges to enable the identification of the calling subscriber. In addition to installation in newly configured exchanges, an existing exchange can easily be retrofitted. This is necessary, for example, if multiple counting is to be introduced for fee entry instead of the principle of single counting. If there are no metering circuits in this regard in the existing system, the information required for registration and billing of the fees per subscriber must be transmitted to the office to which the relevant central fee calculator is locally assigned. For this purpose, it is the identity of the calling subscriber, the connection destination and the duration of the call. The functional sequence in the identification of a calling subscriber by a central device is described below using the exemplary embodiment. The subscriber in question should be checked for his authorization for the respective connection each time a connection is established.

A line set LS is looped into the line trunk group going out from the first group selection level IGW. In the case of a replica in existing offices, these line sets are inserted at the intermediate distributor in the lines between the corresponding outputs of the first group selection level and the outgoing transmissions.

The line set LS can be assigned by the subscriber station Tin via the subscriber circuit TS, the call finder stage AS and the line section LI. The line set is occupied during the establishment of a connection and during the period of its existence. A larger number of such line sets is provided, a group of line sets being connected to device RP which processes incoming control identifiers and which transmits control commands to the line set and which in each case is associated with this group. On the output side, an outgoing assignable connecting line L2 is connected to each line set. The RP implemented with a processor with register function has u. a. the task of recognizing and storing certain switching states in the line sets, of processing these recognized switching indicators in order to conduct a dialog with other devices and of logically linking them. In addition, it serves to issue control commands, for example, to individual controls or switching elements present in the line sets from the detected signals of the respective line set and from the identifiers supplied by other devices.

When a line set is seized due to a connection request by a subscriber Tin, a test and occupancy circuit is created in a manner not shown

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closed over the occupancy or tax wire c. Is registered in the Lei RP. From this device, however, line LS is still the lines a and b of a speech then a corresponding, the signaling signaling wire pair indicated. The given with the assignment of the cable set request signal if, on the basis of the identification to be carried out with each other, i. H. the result of the comparison of the results of the two subscriber numbers of the calling subscriber compared to one another and, if appropriate, the 5 subsequent query processes, a matching query evaluation of his assigned subscriber class is ascertained. For this purpose, this is now carried out as follows: the first interrogation process is stored in the storage unit a

The result of the reassignment of the wiring harness on the c-wire via the potential shift which also occurs from the counting device is evaluated as a signal by the reading device L of a wired gate circuit Gc which is controlled by 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 which is fed at the time of the following device when the signal present at the other input of the gate circuit interrogation process. That a corresponding addressing signal is applied in association with this. The result of the temporarily stored line set is the same for the gate circuit Ga, via which the corresponding coupling with the line a of the speech circuit 15 is transferred to the comparison circuit as a result of the current counter position.

pair of switching states are registered on this wire.

that can. These switching indicators to be registered can be the two query results and, in the event of inequality, can be, for example, dialing pulse characters, 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 polling process, the sharing of the switching states to be polled via the gates on the same device RP recognizes that there is actually an assignment, as indicated in the figure, is used by the register processor, which had been used for information and not just for interference IV. If you set more than 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 common to line sets, one with the assignment, as indicated in the figure, a functionally coupled memory arrangement is applied to the line AF counting device ZR, a signal characterizing this state is applied.

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

This counting device in the common register program and the described detection of an assignment also in the processor now switches an addressing signal to the individual with 30 or in it processed switching identifiers in a cyclical sequence and given the same time intervals LS that arrive or are passed on over the same time intervals , the number of coupled cable sets in number. For example, the matching connection points on wire a could be. Switching states by querying the gate circuit Ga

Each of these connection points, of which only that is determined and stored in the device RP. Out

Connection point AZ is shown, then the start or end of a circuit identifier fixed line set can be connected via an appropriate addressing line AD, which compares successive query results. Each of these addressing lines is routed.

in the relevant line set to that input The frequency of the respective polling processes for a

Gate circuit Gc and Ga, which is not selected with the control or specific line set, is selected so that the switching speech wire is coupled. Furthermore, it is securely connected to the end of the relay ID with a weight indicator with the shortest duration. This relay is one of 40 that can be detected.

several bistable relays in the wiring harness and to be used with each new wiring harness

serves to activate an identification circuit of the calling subscriber when it is activated. This relay could also be replaced by this assignment, as already explained, by the detection of the speaking electronic circuit. resulting shift in potential on the occupancy

If the line set LS 45 or control wire c is assumed to be occupied by the line set in question and the associated potential shift on the corresponding device RP. If a c-wire assignment has now occurred at the output of the gate circuit Gc, a corresponding identification request signal is generated if the individual signal is formed in the course of the cyclical activation and the one input point via the request line AF to the connection points AF by the counting device ZR supplied to the gate circuit Gi. At the same time

Connection point AZ receives an addressing signal. The output signal which is common to the plurality of line sets LS, the setup signal of the gate circuit, is received by a corresponding device RP by a corresponding storage of the receiving arrangement ER of the device RP, which newly assigned line set is used to identify and via a Reading unit, which is to be assigned as indicated by the arrow e and that it is only used for this line, is also controlled by the counting device ZR, was sent to the gate circuit Gl. The inscribed in a storage device Sp. The instantaneous 55 identification of the counting device of the counting device formed in each case indicates which signaling signals are used by all devices RP of the line sets which serve the device RP, this common, centrally arranged identification device IDZ

Signal originates. The storage device SP is registered in several and the subsequent functions associated therewith

individually assigned to a specific cable set. For this purpose, the existing one-nte storage units are first divided. On the basis of the information received via the 60 directions RP for the presence of certain line set control line e, the request signals to be assigned via zen are now queried. In order to enable a wire of the information multiplication received this query, the central identifier is equipped with a signal in the assigned to the line set in question and a counter ZI. This counter inscribes, for the memory unit designated with position a, that each device RP to be checked by it has an associated gate circuit Gc at the next output for this line and points is. If this counter now outputs an addressing signal which, since a re-assignment is required, again outputs an output assigned to a device RP, the corresponding output signal, which also comes from the device, sends this addressing signal via one of the devices concerned

individually assigned addressing line to the other input of the gate circuit Gi. If there is no identification request signal at the input of this gate circuit connected to the request line AF, the central identifier does not receive an identification request signal from the relevant device RP when the relevant output of this gate circuit is queried via the corresponding addressing signal. In such a case, the counter ZI contained in the identification device IDZ switches directly to the next counter output assigned to the subsequent device RP. In the device addressed first via the counter output AG, the addressing signal is thus switched off and applied to the subsequent device, which is common to another group of line sets, via a corresponding line.

If the counter ZI of the central identifier reaches a counting position in which a device RP with a corresponding request signal is pending on the request line AF for interrogation, then the signal present at the output of the relevant gate circuit Gl in association with a newly assigned line set arrives via the central one Line Li to the receiving circuit E of the central identification device IDZ. The line Li branches from this receiving circuit E to all the devices RP operated by the central identifier. Immediately after the receiving request E has received the identification request signal, the counter ZI is stopped by a corresponding control signal. The counting device remains in the position reached until the required identification process has ended.

Already with the establishment of the identification request signal by the device RP, a way for the identification signal to be sent was prepared. This was done by addressing the relay JD in the counter position in which the new assignment of a line set was registered by querying the corresponding assignment wire. As soon as the counter ZR reaches the counting position corresponding to this line set, the switch zr, shown as a mechanical contact for reasons of simplification, is closed. Relay] D can respond because the addressing of the relevant wiring harness should address the addressing.

The relay JD should be addressed during the entire course of the requested identification process and, for example, be switched back to the initial state with the transfer of the obtained identification result to the device RP which processes this result.

By actuating the relay's own contact id, an identifying circuit is activated. The contact idz in this identification circle is an upstream central contact and is controlled in such a way

that it is closed during the active phase of the device RP. Before activating the relay ID, the receiving circuit E of the central identifier can be used to check whether the intended identification path is potential-free, as is required when the contact id is still open. If this were not the case, the identifier could identify a fault from this fact. With the actuation of the relay ID in the relevant cable set, however, the occupancy potential which reaches through the now closed contact id must be registered by the receiving circuit of the identifier after a certain time. If this is not the case, a malfunction can be identified. If the correct closing of the contact id is determined, the transmitting device S, which supplies the identification signal to be applied, can be effectively connected to the identification circuit containing the contacts idz and id via the receiving circuit E. Through a measurement

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The potential state of the transmission line can thus be determined whether the commands to be carried out for the course of an identification process and the switching of the path are carried out properly.

The subdivision of the identification path in the event of a fault enables better fault isolation and thus more targeted fault handling. The entire identification device can no longer be blocked by a contact whose function is impaired.

On the basis of a corresponding program control, the central identifier now causes the transmitter S to emit an identification pulse of, for example, 1 ms duration. For reasons to be explained later, several identification pulses can also be transmitted in a periodic sequence with a pause interval of, for example, again 1 ms. The signal emitted by the transmitter can represent a sinusoidal voltage signal lying outside the hearing range. This AC voltage signal can be fed potential-free into the control wire c via the contact id. This results in fact as an identification signal with the sine voltage of e.g. 20 kHz modulated direct current signal. Such a signal results in optimal transmission properties over the selected identification path. This identification path runs from the transmitter S of the central identification device IDZ, via the register processor RP common to several line sets, and by means of the actuated contact id in the relevant line set via the control wire, for example into the c-wire of the established connection path, the subscriber circuit TS of the calling party Participant, via a device CE and the line provided with the reference symbol K to a receiving circuit ES of the central identification device. Since the use of the speech wires as an identification path is avoided, the identification process cannot be influenced by certain participant behavior. When a 20 kHz AC voltage signal is selected as the modulating signal, the tendency for overcoupling to adjacent lines is still so low that an admissible interference voltage tolerance is not yet exceeded. In addition, there is no influence on the metering carried out directly by the participant by means of a corresponding counting device. An appropriately programmed control can provide the possibility of making the keying of the transmitter S present in the identification device variable. If the selected roof width for the transmitted AC voltage signal frequently interferes with the identification process, this could be ruled out by choosing a different roof width.

There is now a separate connection for each subscriber between a subscriber-specific connection point and the coding module designated CE and yet to be explained in more detail. These subscriber connection points are located where the subscribers are concentrated in terms of circuitry. This is the case, for example, on the call seeker selection stage AS or on the subscriber-specific counting devices Zä, for registering the counting pulses to be counted for an existing connection. If there is no continuous control wire, the capacitor C1 is required for switching through the alternating current between the group selection stage, for example the IGW stage and the call seeker selection stage AS. If one were to use a pure direct current signal as an identification signal, additional problems would arise with the switching of the relevant identification circuit in a similar telephone exchange system. In the exemplary embodiment, the input of the counter Zä serves as the subscriber-specific connection point for connecting a coding module CE. Through the capacitor C1, the coupling takes place over the selection stages mentioned.

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ment of the c control wire with the respective meter input to the metering devices as the individual metering meter z. Connection point directly at the relevant meter rack

In each case, len are arranged as subscriber-specific connection points. On the basis of these decentralized meter connections of a maximum of 100 users, coding is therefore not carried out for each user connection. With an office of, for example, a wire between the relevant meter racks and the Iden-10,000 connection units, 100 such certification devices would be required. The coded subscriber number

Coding modules available. For each group of hundreds of mer when a 2-out-of-5 code is used by a subscriber, the relevant 20-pair ring cable to the central identification device subscriber number is generated in the assembly CE in coded form. To be transferred to everyone. In the event of a subsequent retrofitting of an office that is individually coupled to the coding assembly CE, the installation effort is therefore very conclusive. One of the capacitors C2, C3 is low. Due to the modular, on a hundred participants

Resistors RI, R2 and the existing Schmitt trigger ST group-related structure of the coding module, there is an input circuit. This input circuit has an optimal adaptation to the existing exchange, a protective function for the subsequent electronic coding point size is possible. The 20-pair ring cable K is via a unit W and at the same time serves as a filter for interference voltages, is a corresponding multiple with each of the coding modules I of the capacitor C2 suppresses high-frequency interference peaks. which only the coding module CE is shown is connected. At the same time, this increases the earth capacity of the part. For each digit of the coded subscriber number receiver circuit TS to the counting device Zä connecting two wires normally give a signal. This signal extension cable increases, so that an overlap of the identification can be greatly reduced from the half-wave decorative signal deformed into rectangular pulses to adjacent wires. About 20 of the alternating voltage used for modulation, the capacitor C3 is used for the DC separation of the signal, e.g. 1 ms roof width. That with all of the respective input from the counter wire z. Furthermore, decentrally arranged coding modules are linked by a ring. The dimensioning of the capacitor C2 and the cable K leads to the receiving circuit ES of the central identification

Resistor R2 of the input is designed as a high pass, so decorative device IDZ. In relation to each core of the ring cable,

The fact that AC signals with a frequency that is less than 25 that the pulsed identification signal can carry is blocked in the Emp — the frequency of the AC circuit which is the receiving circuit used to form the identification signal and is used as a comparison element as a comparison element. Switching exclusive OR gate V, a pulse consisting of the resistors on the counter wire, is formed by differentiation into defi ned narrow pulses consisting of R3, R4 and capacitor C4 and diode D. With each positive integration switching element J for delayed evaluation of the

Signal changes at the input circuit of a coding 30 output signal of the comparison arrangement V, as well as a group, creates a pulse that is present due to the size of the capacitor storage element ZS. For a wire of the ring cable sator C2 and the resistor R2, and by the for the K, these input elements are shown. That for all coding

Schmitt-Trigger ST predefined threshold voltage determines components common ring cable is possible, because the individual. Such impulses derived from interference voltages will not be processed at the same time as identification requests but, as will be described later, processed one after the other in a receiving device, so that the information transmitted in the coding direction of the central identification device IDZ is suppressed in the form of information transmitted via the ring cable interference voltages can, for example, be clearly assigned to a single subscriber line by means of counting pulses.

or by signal changes on the wires, which are caused by the selector run The respective receive signal for the receive circuit. The via the subscriber-individual ES is compared in the comparison circuit V, which for example can be a dual connection point, for example a four-digit exclusive OR gate, with the subscriber number appearing from the unit ST for each of the transmission control pulses given in the Hun . After the introduction of time-of-flight differences, separate participants grouped together may only then be registered in the receiving circuit ES by identifying an identification process at the output of the coding-adding pulse.

unit W for each digit of the subscriber number in a code that can be monitored for as long as the transmitter S by a corresponding pulse. Provides this monitorable code a 2-out 45. While these 5 codes represent the temporal correspondence, there are therefore for each position of the signals pending for a subscriber at the output of the subscriber number belonging exclusively to this group, that is to say that the link does not have any signals, but such signals only arise for the ones, Tens, hundreds and thousands place five off during those times when due to the walkways exist. From these individual positions of the partial time differences, the corresponding difference signal to the subscriber number assigned outputs then lead 50 times each. The subsequent delayed signal in the undisturbed operating mode becomes two outputs. The respective temporal evaluation is selected such that it can refer to one hundred subscriber numbers of a coding unit W undisturbed sequence of such an active wire channel, is larger than the duration of a difference signal due to individual coders each having ten connections. In this way, modules, preferably in integrated circuit technology, result for the memory components connected downstream of each wire.

be encoded. The coded output of the relevant sub-direction ZS no control signal. This fact is then the subscriber number in the coding module CE for 100 participants by the respective memory device, which is symbolically represented by the device W, for example. The toe can be a bistable flip-flop, as a statement of an existing * and ones digit is evaluated directly from the circuit NEN identification signal. If the wire does not determine the identification of the inputs of the device W. The hundreds and fizier signal leads, so arises at the output of the comparison scarf - the thousands digit is a difference signal due to the hardware circuitry 60 device V, which overcomes the response-delayed out of the individual coding modules, for example by overvaluation, so that due to this fact in the Corresponding wire bridges to be specified for each storage device ZS the absence of an identifi group. ornamental signal is written. The delayed evaluation

The groups within the individual coding modules can be designed such that a delay occurs both with an increasing place-specific hundreds and thousands place 65 and with a falling edge, is indicated by the arrows Hv and Tv. In addition to the described evaluation of a useful signal of individual coding assemblies CE, each output is followed by a driver stage TR in the respective decentralized coding construction. The individual assemblies are selected when selecting the group formed from the switching impulses that occur.

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len impulses suppressed. Due to a 20 Hz pulse with a in the described to the prepared identification path

The identifying pulse emitted in this way therefore creates the partial 1 ms duration, each separated by a corresponding subscriber number after the individual digits, each with a pause of 1 ms. A pulse series of at least three pulses could also be sent as the identification signal to the one assigned to each wire of the ring cable K

Storage devices ZS can also be monitored 5, which then in the manner of a block formation in each case

Cached 2-of-5 code. That will be assessed using the sum.

2-out-of-5 codes and on the assumption of a four-digit actual by comparing individual identification processes and

Subscriber line number in 20 bistable flip-flops - code monitoring the result of the initiated identification

If the result of the saving was recognized as being correct on the basis of the identification sent, the identification pulse determined can now be determined by the io phone number, possibly with the addition of a supplementary number.

of the storage and control-specific exchange code and local area code in the output buffer memory

unit MC of the central identification device IDZ is written under adapter A of the central identification device.

solution to the possible input bit width is read out serially and the storage unit SE can also be adopted for the subscriber connection determined. For this purpose, participants assigned to class can be determined. This can be done for the individual digits of the stored call number by querying the class memory stored in the microcomputer unit by the unit Ad of the microcomputer MC and storing these features. The encoded address is from the chers KL. This memory can be recorded directly with the address decoder ADR via a corresponding addressing line resulting from the identification of the subscriber line number. It will then be used to query the address mer as the memory location address. For this purpose, the assigned combination of five gates of the total of 20 subscriber numbers present in a 2-out-of-5 code is put into an opening potential corresponding to the number of buffers of the existing gates G1 to G20 which enable control within the microcomputer unit. Converted to this correct BCD code. This conversion, carried out for each digit, can then be carried out in the individual buffers in unit U on the basis of a digits of the identified subscriber correspondingly stored in part, the connection number being adopted in the storage unit SE. do not get away. It is now checked whether an identification signal is assigned to the authorized »or a class« information that is not stored in the international telecommunications system under the condition of a tigt ». Another possibility for 2-out-of-5 codes on more than two cores for a digit, for example, is to define a privilege that is external. Such a disturbance can, for example, be said by one that if a voter does not run properly due to a catastrophe, for example due to traffic restrictions, this subscriber is able to establish a short-term connection and the transmission of an identification signal. This bridging of two examples, mentioned as a class feature on other wires, is representative of a multi-step. It can also be mentioned on a number of possible participant classes.

Passive channel a signal occur, which is initially used as an identification.

decorative signal can be evaluated. Such errors can result in information stored in the central identification device.

can be recognized by code monitoring. Is determined by functions, that is, the identifica-

this code monitoring signals such an error, so the number and the associated class relate to which is the identifier initiated on the basis of the identification signal RP which originally requested this information

Repeat the decorating process. be transmitted. The recording and further processing

If the code monitoring is activated in 40 this information in the device RP, the identification process must be repeated in any case. It circuit of the adaptation circuit A. However, this information is also transmitted in the positive test case, ie if the latter can now be used by the device RP to transmit a higher-level result triggered by an identification pulse, no other long-distance office. This can be recognized, for example, in the manner of a fault, in order to form a final statement, which is to be assigned to a multi-frequency code by this device, to use the result of a number of identification processes 45 and control the transmission of this information. It will first be done by means of an identification device, not shown. After processing impulse delivered identification result in the memory unit SE of an identification process is adopted in a manner not shown. This is stored in the 2-of-5 code used, a reset signal is given to the relay ID, whereby the safe result is then opened with the one by the subsequent contact id. Comparison of the identification result obtained to process another ID identification pulse. The request for a group is then verified. This can be done in a similar way to that in the device RP shared by line sets, the device RP comparing the central unit which has been assigned by two to the transfer of the said information to a directly successive scanning pulse Office is, for example, described in the performance result. For example, a corresponding evaluation logic can be specified by re-registration according to the so-called toll ticketing method that two 55 are required.

successive evaluations have the same result In addition to this information, we will have to provide. Another possibility is to permanently establish the connection, with the device RP being switched on, for example in the manner of a majority decision-related data, e.g. Data on the time of arrival of the at least two results of three individual signals of the registration number, i.e. must agree on the start of the evaluations derived from the conversation. With the 6o connection and in the same way, data about the end of this evaluation of the result-call connection delivered by a single pulse, i.e. The arrival of a trigger can also transmit the closing sign or the closing sign following the identification pulse. Be included in the evaluation in a higher-level break. The individual central data memories arranged in the office can then be used to identify the identification pulses on which the evaluation is based. All the data relating to the individual calls can be stored by the 65, for example in a 1 ms cycle, and generated at the appropriate time when the transmitter S is keyed in will. This will then provide direction.

1 sheet of drawings

Claims (6)

631586 2 PATENT CLAIMS An identification principle is known in which the 1. Circuit arrangement for identifying connection-originating switching or connecting element back to the organ on the basis of a corresponding identification-requirement origin with the interposition of an identification signal in telephone exchange systems, a decorative network being formed in a test circuit in which the identifying signal is used by means of the initiating switching element and the s of an identification signal, for example the connection path already established to the origin to a subscriber number assigned to the connection is sought. As an identifying device individually assigned device and from there via the along the already established connection section an identifying network for transmitting the identifying signal, the speaking wires or the control wires can be used as the effecting device and this is transmitted. The selection of the identification path depends on its level identification result of the fee allocation and / or in io properties, on the ability of the identification pre-connection to be influenced by choice information of the authorization movements through processes on the lines and also on the arrangement based on stored subscriber class characteristics of the flow of the identification signal used which serves with the lines, characterized in that as the subscriber-coupled switching means. In the known method, which uses a control wire as an identifying network, which is arranged spatially decentrally, each with an identifying path, the identification network used is a decoupled magnetic core evaluation field coupled to a group of subscribers of a predetermined number. In this evaluated coding unit (W) in integrated circuit technology, a field leads during the participant identification with the fact that within the participant group each c-wire of each participant connection connected Lei participant-specific connection point, each with a fixed device. Each core field is constructed in such a way that, for example, the assigned input of the coding unit is coupled in such a way that the columns correspond to the four digits of a subscriber number and the function lines assigned to the individual program steps correspond to the values 0 to 9. With each sequence through a common identification process for all coding units, pulse receivers are then logically processed to the processing of their output information, a read / write winding of the cores, one core column each for instructions and data. The information determined in this way can then be passed on to central 25 switched registers containing the input unit and output elements. Evaluation and control device (JDZ) is effected. In telephone switching systems, 2. Circuit arrangement according to claim 1, characterized in that the principle of so-called single counting is characterized by the fact that the subscriber calls. This principle is based on the fact that, without taking into account the corresponding input of the coding unit, the duration of a call for the call identification signal that is given to the individual digits of the subscribers for each call connection, one fee code number, e.g. four-digit, corresponding numerical value unit is registered. In contrast to this, in the case of the conversion into a monitorable code and the central time counting, charge entry for the call device is supplied for processing. the participant in certain of the spatial distance 3. A circuit arrangement as claimed in claim 2, characterized in that the subscribers connected to one another in each case register a fee unit in a memory area of the central intervals. The memory of the device contains the class features of this registration. This registration can be done in counters that are stored in the subscriber subscriber lines and that these clasps connection circuits are assigned to the individual subscriber stations with the part that represents the identification result. This form of time pulse counting is then not applicable to the subscriber connection number queried as a memory location address if such counters and those will correspond. 4o the counting circuits are not available, e.g. B. only 4. Circuit arrangement according to claim 2, characterized kenn- a flat fee is charged. In this last drawing it should be noted that the coding module (CE) is only released for the period specified in the case of one of the respective identification pulses depending on the duration of the conversation. Billing will be introduced, so this would be through a 5. Circuit arrangement according to claim 2, characterized in subsequent installation of such call charge meters, that is possible jointly for all decentralized coding units 45 and their control circuits. For such a retrofit - only a ring cable (K) with a for the transmission of the loan installation then the protection against all possible coded numerical information must be carried out with sufficient number of cores of an incorrect count. It leads to the central facility. there is also the possibility of transferring such offices to an existing 6. Circuit arrangement according to Claim 2, characterized in that the remote dialing office with automatic fee recording indicates that the central facility (IDZ) closes under use. For this purpose it is necessary to implement a microcomputer (MC). required data to be transferred there. It is therefore necessary, among other things, to determine the identity of the calling subscriber.