DE1144782B - Circuit arrangement for controlling special services in telephone systems with separate setting and speech paths - Google Patents

Description

Circuit arrangement for controlling special services in telephone systems with separate setting and speech paths In telephone systems, it is known when Calling certain subscriber lines a switchover of the connection to special services to undertake. These special services take the one for the subscriber concerned specific call and handle it in a predetermined way. Is for example a subscriber line has not been occupied for a long time because the operator in question is away or absent for other reasons, such a subscriber line be switched to the so-called telephone order service, the one for the relevant subscriber line answered certain call to the effect that he notifies the caller that the subscriber in question is for a certain period of time is not to be spoken. He can also give him information about which replacement phone number to call can call, or he can send him some other message. To the Special services that become effective in this way also include catching annoying ones Calling party to determine where the harassing calls are originating.

The known arrangements for the control of special services at the Calling certain subscriber lines make certain interventions in the Teilrichmer line circuits and the use of additional participant-specific switching means is necessary. The connecting lines, that go to the special services are to the subscriber lines, and connected in the marshalling panel of the relevant telephone system and then over several concentration levels to the special duty stations. The leadership the lines from the subscriber connection points to the special service places at least three-core wiring.

The invention relates to telephone systems with separate adjustment and speech channels and with a between a Markierwahlstufe and the subscriber's line circuits arranged Rangiereinrichtung and proposes for such systems a control of special services the call before attempting certain subscriber lines over the known arrangements with fewer subscriber owned switching means and gets by without the additional effort of concentration levels.

The invention achieves this in that those marking outputs the marking selection level, the subscriber lines switched to a special service are assigned, via the switching device except with the subscriber line circuits also via an institution that identifies the type of special service in question are connected to the control devices of the adjustment path, which in their additional Control via such an access the incoming, up to a connection set the speech path through-connected connection except to the desired subscriber line in addition to the special service facility required in each case. In this case, it is advisable to use one set up for bidirectional traffic Subscriber selection level and a group selection level set up for one-way traffic the special service facilities to the outputs of the respective Group dial level connected.

The remote-controlled switching of a subscriber connection to a special service or the switching back of such a connection from the special service to the actual subscriber circuit, which is often required in telephone systems, is made possible by the invention in that in the connections leading from the shunting device to the control devices of the setting path a transmission of a code of the marking outputs of the marking selection stage is switched to the control devices of the adjustment path, depending on their switching state, remotely controllable switching device.

The schematic diagram of a connection system with separate setting and speech paths shown in the drawing contains a two-part subscriber selection stage TW and a likewise two-part group selection stage GW. The traffic within the subscriber selection level TW is directed twice, while the traffic in the group selection level GW is single direction. The subscriber circuits TS, connection sets VsA and VsB as well as connection sets YsC for calls arriving via connecting lines are also located in the speech path. The adjustment path contains registers RG and RS, tax records StT, StA, StC, StB and StRS as well as an evaluator AW that evaluates the electoral information and a subscriber allocator TZU for receiving the individual selection information. The connection of a place provided for the telephone order service takes place via the connection set VJD, while the connection set YsF is used to catch annoying calling subscribers. Furthermore, a connection set VsS, which is intended for the switching of special services and which is accessible to an officer, is provided, which arrives via an incoming test line. PL is achievable. The outputs of the subscriber assigner TZU are routed via a routing device VR, via which the individual outputs can be connected both to the respectively assigned subscriber connection circuit TS and to a marker device FAD-M intended for the telephone order service or directly to the evaluatorAW. The register RG or RS is coupled via register coupling stages RKI or RKII. The registers themselves are in turn subdivided into registers for incoming and outgoing traffic as well as for peak traffic. The register RGg is used for the outgoing traffic and the register RGan for the traffic arriving via connecting lines and the register RS, which can be reached via a second switching stage RK II, for the peak traffic. The tax rate for peak traffic (StRS) determines whether such a register, which is reserved for peak traffic only, should be switched on and how it is switched on.

The connection is established to establish an internal connection themselves in the following manner.

The off-hook subscriber Sp is identified by his subscriber network TS. The assigned the Teihiehmergruppe concerned rate StT assigns within its subscriber group, pending calls, and provides after labeling of a calling subscriber line, the j that port accessible and occupiable intermediate lines of the subscriber selection stage, which extend between the A- and B-part of the subscriber selection stage TW fixed. The tax rate StA, which is also occupied by the tax rate StT, finally determines one of these intermediate lines. Suddenly, controlled by the two tax rates StT and StA, the connection is switched through via the A and B parts of the subscriber selection stage to a connection set marked by the tax rate StA for the outgoing traffic VsA. A register RGg is connected to this connection set VsA via a first register group stage RKI. If all RGg registers are occupied, registers that are commonly assigned to several large groups of participants, so-called registers for peak traffic (RS), are used as an aid. Such a register for peak traffic is connected via two coupling stages, namely via the first register coupling stage RKI, which is set again for this purpose, and the second register coupling stage, RKII. The control record of the register group for peak traffic StRS then causes a register RS to be connected to the above-mentioned coupling element of the second register coupling stage RKII.

With the marking of a calling subscriber line by the Tax rate StT of the respective teacher group is also its class affiliation at the same time determined and communicated to the StA tax rate. From this tax rate comes the relevant class designation in the register RG or RS so that it can be used for further Connection establishment is taken into account accordingly.

If a register is connected to a connection set YsA, the dialing signal is transmitted and the subscriber concerned can start dialing. The calling subscriber receives his feed current from the connection set VsA. The dialing information recorded by the register RG is checked by the evaluator AW to determine whether it is a continuing connection or an internal connection. For this purpose, the evaluator A W switches on briefly to the register after the first digit has been recorded and immediately switches off again if it is not yet possible to determine the direction. The connection of the evaluator A W is repeated after selecting the second and, if necessary, the third digit. At the same time, it is also checked whether the calling subscriber has access to the desired traffic direction based on his class identification. If the evaluator A W recognizes that an internal subscriber is being dialed, it marks the connection to be set up as internal in the RG register and is initially enabled again. The register only reports again when the number of the connection to be controlled is fully selected. After the last digit of the relevant subscriber number has been recorded, the evaluator A W is connected to the register RG again. The AuswerterAW fetches the pulse series required to determine the selected subscriber from the RegisterRG and transfers them to the subscriber allocator TZU. This subscriber allocator is available once for each exchange and is used to identify the subscriber lines called. This identification takes place in that marking potential is applied to the output associated with the relevant subscriber line circuit. As a result, the relevant subscriber line circuit is marked as called and, as if it were an outgoing connection, the relevant subscriber circuit TS now influences the control rate StT of the relevant subscriber group, which also defines the large group of the called subscriber via the tax rate StA.

The tax rate StB, which is determined by both the AuswerterA W and the tax rate StT can be influenced, on the one hand switches to the connection sets VsB of the vom Tax rate StT marked target group and on the other hand to those designated by the register Intermediate lines of the group selection level of the output large group. The tax rate Tax rate and the tax rate assigned to the desired participant group StT now determine in cooperation a free intermediate line of the participant election level TW, a free connection set VsB and a free intermediate line of the group election level GW, taking into account that the marked line sections are a single Connection train must be interconnectable. The starting point of the connection is the connection set VsA marked by the register, while the target point is the one from Subscriber allocator TZU is marked subscriber circuit. The connection is via all coupling stages switched through abruptly. From the connection set VsB the called subscriber line is called and gets off after being hung up this connection set also has its supply current.

A connection set VsC is assigned to the incoming connection lines. If such a connection set is occupied, it requests the connection of a register. The connection of the registers to connection sets YsC is carried out by the tax rateStC ordered and controlled. The arrangement is made in such a way that that a group of connection sets VsC a limited number of registers RG is permanently assigned. If all of these registers are occupied, the tax rate takes care of it StRS the connection of a register RS intended for peak traffic a first and second register coupling stage RKI and RKII to the connection set VsC. As with internal connections, the identification of the desired takes place after recording Subscriber control of the subscriber line circuit through the register that is switched on the desired call station and the connection of this call station via the Subscriber selection level TW and the group selection level GW for the incoming connection set VsC, which now takes the place of the connection set VsA for internal connections.

If it is a matter of further connections, the evaluator identifies AW the outgoing trunk group to be controlled, while the register is for the connection setup determines the group of intermediate lines to be considered at group election level GW. The tax rate StB then switches to the from the evaluator AW and register RG or RS marked lines and looks for a free intermediate line, the access to a free outgoing connection line.

After marking the connection sections to be occupied by the Tax rateStB continues the connection based on the connection set VsA or VsC connected through.

The switching device FAD-M, which is arranged between the routing device VR and the evaluator A W and which can be controlled via the subscriber allocator TZU with appropriate routing, contains a bistable memory element for each subscriber connection to be switched to telephone order service, which emits a specific signal when the subscriber assigned to this memory element is selected with the corresponding routing of his connection. Accordingly, the outputs of the subscriber assignor TZU assigned to the call numbers from subscriber connections switched to the telephone order service are not only to be led to the subscriber connection circuits TS, but also to be connected to the inputs of the marker for the telephone order service FAD-M, which like the outputs of the subscriber assignor TZU and the individual marking points of the subscriber circuits TS are also located in the shunting device VR.

If a connection is to be switched to telephony service, a connection must first be established from the device FAD-M to the subscriber allocator TZU. Then the memory element belonging to the routed connection and located in the device FAD-M must be controlled so that a corresponding signal can be given to the evaluator A W when the connection concerned is selected.

The control of the various bistable elements in the facility FAD-M works in the following way.

The officer designated for the telephone order service occupies over a special connection set VsS a register RG. In the special connection set VsS stored that the calling party is a FAD officer. After choosing the The number of the subscriber to be switched to the telephone service takes effect Register through the evaluator A W to the subscriber allocator TZU, whereby the relevant Subscriber line is marked incoming in the manner described above. Is the relevant subscriber occupied, the officer receives from the special connection record VsS the busy signal and must repeat your call later. Is the subscriber line but free, based on the connection set VsS, the group selection and subscriber selection level, a normal connection to the selected subscriber is established. At the same time, however, the connection set VsS also switches to the marker for the telephone order service FAD-M, which is informed that the to identify the subscriber circuit marked by the subscriber allocator TZU accordingly is. After establishing the connection from the officer using the connection set YsB to the subscriber to be switched to the telephone service will be registers, evaluators and subscriber assignors free again, while the FAD marker from the special connection set VsS is still occupied. If the called subscriber hangs up, make sure the officer that she has dialed the correct participant, and then sends a control pulse for FAD identification of the relevant connection in the FAD marker. After successfully marking this participant by influencing them accordingly of a bistable element in the device FAD-M receives the bearer as an acknowledgment feature a command from the special connection set VsS. The existing Connection released again.

Withdrawal of a FAD mark works in a similar way. The officer calls the relevant participant and deletes it by pressing a button FAD indicator in the FAD marker. So if once a subscriber circuit in the Routing device VR is routed to the FAD marker, can be done without the intervention of the im Voting hall present person a FAD identifier as often as desired and entered can also be deleted again by the officer.

When a subscriber circuit marked FAD is selected, the subscriber allocator TZU simultaneously causes the associated and appropriately controlled bistable storage element in the FAD marker to emit a pulse. This impulse causes the evaluator A W that, in addition to the normal connection via the group selector and subscriber selection levels to the called subscriber, a second connection to the office of the telephone order service is established. This second connection is attached to the first connection in the B part of the group dialing level. The participant and the FAD Beaintin are called at the same time. If the subscriber is the first to hang up, the connection record for the telephone order service VsD picks up the hanging message from the connection record YsF on the line leading to the telephone order service and leaves the connection to the telephone order service off, but if the officer reports first, the connection train from the B part of the Group dial level triggered up to the called subscriber.

Connections to specific, specially marked subscriber lines can be caught depending on the caller. If such a connection is selected, the register not only marks the associated subscriber circuit TS arriving via evaluator A W and subscriber allocator TZU, but also at the same time returns a certain signal to evaluator A W via the corresponding marking point F in the marshalling device VR. In response to this signal, an interception connection set VsF is connected to the established connection in the B part of the group dialing stage, in a manner similar to that when switching to the telephone order service, a connection set VsD is connected to the B part of the group dialing stage. The connection set VsF monitors whether the called subscriber hangs up his handset when the calling party hangs up. If this is the case, the connection can be established and the interception connection set VsF can be activated again. If, however, the called party does not hang up his handset, the interception connection set VsF does not remove the interception potential applied to a wire as a precaution in a known manner, and the calling connection is intercepted. After a certain time, the connection set VsF gives an alarm by which the personnel present in the electoral hall or those responsible for the electoral hall are requested to determine the calling subscriber line.

Claims (2)

PATENT CLAIMS: 1. Circuit arrangement for controlling special services when calling certain subscriber lines in telephone systems with separate setting and speech paths and with a routing device arranged between a marking selection stage and the subscriber's own connection circuits, characterized in that those marking outputs of the marking selection stage (TZU) which point to a special service Switched subscriber connections are assigned, via the routing device (VR) in addition to the subscriber connection circuits via a device (FAD-M) characterizing the type of special service with the control devices (A W) of the adjustment path, which when they are additionally controlled via a such access the incoming, up to a connection set (VsA, Vfl # of the speech path through-connected connection except to the desired subscriber line, in addition to the special service facility required in each case (FAD, VsF) . 2. A circuit arrangement according to claim 1, characterized in that in the case of a connection setup taking place via a subscriber selection level set up for double-directional traffic and a group selection level set up for single-direction traffic, the special service facilities are connected to outputs of the group selection level. 3. A circuit arrangement according to claim 1, characterized in that in the routing device (VR) to the control devices (A W) of the adjustment path leading to the transmission of a label from the marking outputs of the marking selection stage (TZU) to the control devices (AW) of the Adjustment path depending on their switching state preventing or enabling remotely controllable switching device (FAD-M) is switched.