DE2439165A1 - Telephone PBX with direct call facility - wherein connection is made by operation of a direct call key through a direct path - Google Patents

Abstract

Operation of a key in the telephone PBX makes operative switching means which prevents the direct call program request, and thus the direct call switch operation, and prepares the marking of the direct call extension to be connected to the tested and engaged line. The direct line coupled is applied to the calling line to connect with the subscriber. The direct call key also brings in a number of connections to other lines for marker signals and release of stored information. The interconnection circuits include a number of rectifiers with the relay contacts and have comparison circuits for seach lines and mixer circuits.

Description

Circuit arrangement for a telephone system, in particular telephone branch exchange, with direct call option.

The invention relates to a circuit arrangement for a telephone system, in particular telephone branch exchange, with direct call option, in which a Transfer by pressing a direct call key via direct call transmission is linked to a specific call station via a direct connection path.

In known systems, it is for the connection of the attendant console a special one each for the query side and for connecting to the switching side Button provided.

The object of the present invention is the method and the arrangement for the switching of incoming exchange calls by the operator to simplify.

This is achieved in that after pressing an operator key the direct call program request and thus the control of the direct call coupler preventing, the preparation of the identification of the line occupied with the incoming, queried line to be connected direct call subscriber controlling switching means are effectively switched.

In this way, the direct call key is used as a name key in the course of the Call forwarding exploited. This makes operation at the attendant console easier Simplified without additional effort for Eurzwahl.

According to. a further embodiment of the invention are by pressing a direct call key after preparation of the labeling the with of the incoming busy, queried line to be connected direct call subscriber Switching means for marking the direct call subscriber and preparing the connection the connection between the direct call subscriber and the incoming line that is busy separated.

In the drawings, an embodiment of the invention with the details important for understanding are shown.

Fig. 1 shows a system overview of a private branch exchange Direct call option.

Fig. 2 shows circuit details to explain the embodiment.

From Fig. 1 it can be seen how a call station N1 or

the service telephone BF via the single coupler EK, ten coupler ZK and mixed coupler WEE with a free transmission after identifying through the identifier Id under the influence of the central control device ZE, the marker and Wegesuchers M / WSU is connected. The selection memory seeker is then involved in the transmission WSp-Su switched on a free election recorder WSp and with the help of the election evaluator WBw and the central control device ZE the way to the desired intercom N2 produced.

When dialing an exchange code, the transfer takes place in a known manner to a transfer of office. Incoming trunk connections are made via the trunk mixer META, the tens coupler ZK and single coupler EK are switched through to the desired extension. Calls arriving at the operator console are forwarded by the operator off for the purpose of connecting through the exchange and call station marking is initiated.

In the case of the system shown, a subscriber has a direct call connection wants to establish an exchange, after pressing the direct call key a corresponding Signal lamp switched on at the attendant console (see Fig. 2). By pressing the DT button The switching will be the calling direct call subscriber via activated DL / DE contacts coupled with direct call transmission and called. When lifting the handset he is connected to the exchange via the direct call coupler. There are a call station as many direct call keys assigned as there are connections to direct call subscribers can be produced.

In the systems of the type described above, the mediation incoming trunk calls can be simplified. So far the incoming public calls were produced by the fact that the operator is connected to the exchange line by pressing the inquiry button switches on to interrogate the exchange line subscriber through to the operator side Switching button press connects and with the latter a switching selection memory e i cher V-WSp for recording the dialing numbers for the purpose of establishing the internal connection proven.

With reference to Fig. 2 is a circuit arrangement for a system with Direct call option described, not when pressing the operator key only the switching memory V-WSp occupied, but also the relay VS in the Direct call transmission D-Ue is switched on. With the switching on of the relay VS activates relay DG and thus the program with contact 1vs "Direct call", which is normally initiated when a direct call key is pressed, prevented, the relay DV is prepared for this with the contact 1vs and with subsequent Direct call key press by closing a corresponding dl-Eontaktes, as below is still specified, switched on.

With the contact 2vs the switching on of the relay GT and thus the transfer of a release indicator to the public office or the formation of the community the final key is prevented.

At the same time, when this contact is closed, 2vs is switched on the relays DLI to DL5 (with 5 direct call options) as address relays for the Identification of the intercom station desired by the subscriber prepared.

Now becomes a determination after pressing the operator key the direct call button assigned to the desired intercom station actuated, the relay is actuated, for example when the direct call button D1 is actuated DL1 switched on: 1) +, DT1 line, G1, DL1, 2vs, 3dv, -.

Now the contact 4dl1, the rectifier G2 and G3 a circuit made for the relay DV :; sa, 2) +, TIM-Leltung, 4dl1, G2, G3, DV, 1vs, VB 'line, -.

The relay VB is switched on from the operator console via: 3) +, VE line, VB, 3dv, -.

By actuating the relay DV and switching the contact 3dv the response circuit for the relays DL1 to DL5 is interrupted for effects to prevent further D-key presses.

By closing the contact 5vb, the dial memory finder becomes Identification of an election ending program is required.

With the contact 6vb the transfer of possibly already saved Prevents information from the exchange voting memory to the election evaluator WBW.

When the contact 6vb is actuated, the relay SA is switched on.

4) +, SAT line, 6vb, SA, -.

By closing the contact 7sa is in the central control device ZE requested the "End of Election" program. Closing the & sa contact takes place via the already closed contact 9dl1 the submission of the subscriber address to the MarkiererMe The contact iOsa switches over the marker for direct call DUe an isolating relay for the switching selection memory V-WSp, not shown. At the end of the program, the VD relay (not shown) is in the common part of the operator stationGVPl switched off. This establishes the circuit for the relay VB via the VE line switched off by disconnecting the earth, thereby also by opening the contact 6vb the relay SA and as a result of the opening of the contact iivb also the holding circuit for the relay DL1 is interrupted.

With the transfer of the subscriber address of the direct call subscriber to the This becomes a marker via the single coupler EK, ten coupler ZK, mixed coupler tB connected to the incoming trunk transfer and via this to the exchange. By pressing the key, the exchange switches the connection in a known manner through to the waiting public subscriber.

In the switching state, all direct call keys are disabled, because the relay VS is still on hold, since neither the final key nor a new query key, another earth key was pressed. As can be seen from the above, by Brokering or closing the triggering of the direct call transmission brought about.

After pressing the operator key, two keys accidentally become operated at the same time, the DL relay preferred in the chain connection is switched on and the station corresponding to this relay is marked.

5 claims 2 figures

Claims (5)

Claims 1. Circuit arrangement for a telephone system, in particular telephone branch exchange, with direct call option, in which a Transfer by pressing a direct call key via direct call transmission is linked to a specific call station via a direct connection path, d a d u r c h e k e n n n z e i c h n e t that after pressing an operator key (V) the direct call program request (DG, CA) and thus the control of the direct call coupler (DE) preventing, the preparation of the marking of the documented with the arriving, interrogated line to be connected direct call subscriber controlling switching means (VS) can be activated. 2. Circuit arrangement according to claim 1, d a d u r c h g e -k e n n notices that by pressing a direct call key (e.g. DT1) after preparation the identification of the line to be connected to the incoming, seized, queried line Direct call subscriber's switching means (DV, DL1) for marking the direct call subscriber and preparation of the connection between the direct call subscriber and the incoming line that is seized. 3. Circuit arrangement according to claim 1, d a d u r c h g e -k e n n notices that by pressing the direct call key after pressing the operator key controlled switching means (DV) the activation of subsequent direct call key operations impede. 4. Circuit arrangement according to claim 1, d a d u r c h g ek e n n z E i c h n e t that a switching means activated by the switching constant pressure (VS) the release of the existing connection to be forwarded is prevented. 5. Schaltungsar.ordnung according to claim 1, d a d u r c h g e -k e n n z e i c h n e t that the switching means switched on by pressing the attendant key (VS) prevents the inclusion of subsequently incoming code information will.