DE1080152B - Circuit arrangement for connecting subscriber lines to the telephone order service - Google Patents

Description

The invention relates to the connection of subscriber lines to the telephone answering service.

It is already known to connect the subscriber connection via an isolating plug-in distributor with an interface transmission to be connected when the subscriber connects to the telephone order service for the first time requested. For the actual connection to the telephone order service, the officer chooses over a special service selection path to the connection transmission and sends a certain switching indicator, z. B. eleven pulses.

Another known method also provides a special choice of service in which the Line selector for the duration of the connection to the telephone order service on the relevant Subscriber connection remains set.

Both procedures have in common that one. incoming call from both the operator and can be queried by the subscriber connected to the telephone order service. It However, this does not prevent the subscriber from accepting the call Telephone order service is switched off. This can create complications in billing develop. In addition, the officer can overhear a conversation that is not intended for her.

These shortcomings are avoided according to the invention in that when answering a call by the subscriber connected to the telephone order service himself to the subscriber assigned changeover relay becomes effective, which switches off the telephone order service again.

A further development of the invention is that the changeover relay is only activated after the telephone order service has been switched on can be influenced.

The invention has the advantage that for the duration of the actual connection to the telephone order service only one occupancy relay remains energized, while the changeover relay is only activated when it is checked a line selector responds to the subscriber line and the telephone order service turns on.

A further development of the invention is that the connection to the telephone order service can also be done via call finder.

FIGS. 1 and 2 each show an exemplary embodiment according to the invention. Not all of them to understand The circuit details required for the invention are omitted for the sake of clarity.

Fig. 1 shows the application of the 'invention in a telephone system with preselectors (preselector system). If a subscriber TIn wants the telephone order service circuit arrangement for connection to answer calls

of subscriber lines
to the telephone answering service

Applicant:
Siemens & Halske-Aktiengesellschaft,

Berlin and Munich,
Munich 2, Wittelsbacherplatz 2

- Dipl.-Ing. Fritz Harder, Hamburg,
and Jonni Giese, Hamburg-Bergedorf,
have been named as inventors

to claim, so will be selection /. VW wired in the public office with a relay transmission Ue 1. In addition, the officer selects the transmission UeI by dialing a certain code and excites via the output of the line selector LWT, the occupancy relay C in the transmission UeI by applying voltage to a voice wire; in Fig. 1 it is the & veins. The contact Ic closes and connects. The occupancy relay C via the resistor 2 Wi with voltage, so that it holds itself. It closes the contact 3c and connects the switch relay UI with the c-wire of the subscriber circuit, with the contacts 4c, 5c, 6c and 7c the speech wires of the subscriber line are connected to a second line selector output as well as for the connection of the telephone order service PAD prepared. After selecting a second code number characterizing the second line selector output, the operator can speak to the subscriber via the line selector LW3 and check whether the connection of the telephone order service has been prepared.

If the subscriber TIn switched to the telephone service is called, the line selector checks LWl. Test relay P responds:

1. +, Pll, PI, c-arm LWl, c-arm, I. VW, T, -.

After the high-resistance winding I of the relay P has been short-circuited by the contact Sp , the changeover relay UI responds:

2. -f, PII, 8p, c-arm LWl, 3c, -Ul, 9k, -.

With the contacts 10 m and 11 m, the speech wires of both participants are used to

909 7S7 / 91

Carrying service FAD switched through. The calling subscriber receives a saved announcement that indicates the telephone order service connection of the called subscriber and him. it is up to you to find out more by dialing another number, e.g. B., »The subscriber is switched to the telephone order service. If you want to share something or find out more, please call 114 «. The contact 12 u closes, and the auxiliary relay KII responds. The contact 9 k opens and removes the short circuit of the winding I of the relay K. In addition, the contact 13 k opens and removes the short circuit of the winding II of the changeover relay U , which is connected as a counter winding to winding I in series with the subscriber station.

If the called subscriber answers the call himself by picking up the handset, the winding II of the changeover relay U is switched on via the feed bridge in the line selector LWl. As a result, the changeover relay drops out and its contacts return to the rest position. The telephone order service is switched off. The relay K remains switched on via its winding I as long as .ein line selector is set to the subscriber line.

If required in the transfer UEI a time-dependent relay such. B. a thermal relay can be provided, which carries out the connection of the telephone service FAD only after a certain time. Within the period in which the relay does not yet respond, the subscriber has the option of interrogating the call himself without the subscriber's speech wires being switched through to the telephone order service.

After hanging up the calling subscriber, the line selector LW 1 resumes its rest position, and the excitation circuit for the changeover relay U I and the relay K I is interrupted. Contacts 10 m and 11 ″ open, the FAD telephone service is switched off. The other contacts of the changeover relay U and the contacts of the relay K also return to their rest position. With the contacts 10 u and Uu , the speech wires can also be switched directly to an answering station.

The subscriber TIn can speak outgoing at any time without the preparatory connection to the telephone order service changing.

In order to prevent unauthorized selection of the connection transmissions (z. B. Ue 1), either one or more special selection levels can be used, the selector can only be set by the operator, through special switching criteria, z. B. more than ten pulses, voltage pulse, earth pulse, etc . ; or intermediate transmissions are looped in, which in turn are determined by special switching criteria, e.g. B. more than ten pulses, voltage pulse, earth pulse or frequency call, release the extension. If necessary, an already existing service selection network can also be used.

If the preparation of the connection to the telephone order service FAD is to be canceled again, the operator selects the switching transmission UeI and short-circuits the occupancy relay C by applying ground potential to the other voice wire; in Fig. 1 it is the α-wire. The contacts Ic, 3c, 4c and 5c, 6c and 7c go back to their rest position.

Fig. 2 shows the embodiment of the invention in a telephone system with call searchers (call searcher system). If the subscriber TIn wishes to be connected to the telephone order service, his subscriber line TS is wired in the office with a switchover transmission Ue2. In addition, as already described in FIG. 1, the operator excites the occupancy relay C via the & -wires of a line selector output LW5 . The occupancy relay C maintains its own contact 14c, via which it connects to the α-wire at the same time. It also switches the voice wire of the subscriber line with contacts 15 c and 16 c to the output of the line selector LW6 and prepares the connection to the telephone order service FAD with contacts 17 c and 18 c. The contact 19 c opens and cancels the short circuit of the winding I of the switch relay U on. If the subscriber TIn is called, the line selector LWA checks and energizes the switch relay Ul looped into the c-wire :

3. +, 20p, Pl, c-arm LWA, Ul, 21 k, R, T, -.

The contacts 22 u and 23 u switch through the voice wires to the telephone order service FAD. The contact 24 m closes and switches on the relay K via its winding II. The contact 25 k opens and prepares the connection of winding II, which is connected as the opposite winding to winding I of the changeover relay. The contact 21 k opens and switches the winding I of the relay K on , so that it remains energized even when contact 24 u opens when the switch relay drops out and the winding II of the relay K switches off. As already described in connection with FIG. 1, the subscriber is able to answer the call himself. The disconnection of the telephone order service and the cancellation of the preparatory connection take place in the same way as in the exemplary embodiment according to FIG. 1.

The through-connection to the answering service FAD, which is carried out with the contacts 10m and 11m bzw.22i <and 23 m can also be done via call seekers who are started after well Umschalterelais U and adjust to the direction indicated by the relay K relay transmission. In this case, another normally closed contact of the control relay K and a normally open contact of the changeover relay U would be necessary for switching the rotary magnet of the call seeker on and off. When using call seekers for switching through to the telephone order service, the time-dependent relay can be arranged so that it is switched on after checking the call seeker and its contacts switch through the voice wires of the call seeker.

The two-armed line selectors LW2 and LW5 shown in FIGS. 1 and 2 can also be replaced by four-armed line selectors. The line selectors LWZ and LW6 have been omitted. Your a ~ and & arms would then be the c arms and d arms of the line selectors LW2 and LW5. To prepare for the connection of the telephone service, the officer selects only one code and after checking the line selector can immediately speak to the subscriber who wishes to be connected for control purposes. If this has already hung up before the activation of the occupancy relay C , the officer dials the subscriber's number via a second dialing path.

Normally she then hears the telephony order service announcement.

It is at the discretion of the "public office" to leave the wiring of the subscriber transmission Ue 1 or U el with the subscriber circuit TS in place even after the preparation of the connection of the telephone service is canceled. A renewed application by the participant can be carried out practically immediately in the affirmative case, otherwise only after the wiring has been completed.

Claims (21)

PATENT CLAIMS: 1. Circuit arrangement for telephone systems for connecting subscriber lines to the telephone service that answers calls on behalf of the subscriber, with a parallel call to the subscriber, characterized in that when answering a call by the subscriber (Tin) connected to the telephone service (FAD) connected to the subscriber Subscriber assigned changeover relay (U) becomes effective, which switches off the telephone order service again. 2. Circuit arrangement according to claim 1, characterized in that the changeover relay (U) can only be influenced after the telephone order service has been switched on. 3. Circuit arrangement according to claims Γ and 2, characterized in that the connection to the telephone order service through the connection to the telephone order service the occupancy relay (C) assigned to the subscriber is prepared. 4. Circuit arrangement according to claim 3, characterized in that the occupancy relay (C) after choosing a code over the set voter path, z. B. via the & veins, from the officer controlled (e.g. by applying voltage). 5. Circuit arrangement according to claims 3 and 4, characterized in that the occupancy relay (C) by its own contact (Ic; 14 c) holds itself. 6. Circuit arrangement according to claims 3 to 5, characterized in that the occupancy relay (C) with the speech wires of the subscriber connects to a second line selector output, which the officer chooses by choosing a specific one Code reached in order to speak to the subscriber who connected the connection to check wants the telephone order service. 7. Circuit arrangement according to claims 3 to 5, characterized in that the occupancy relay (C) connects the speech wires of the participant with two other arms of the same selector (LW2, LWS) via which the officer can immediately speak to the participant who Connection to the telephone order service wishes. 8. Circuit arrangement according to claims 3 to 7, characterized in that the occupancy relay (C) influences the changeover relay (U) such that it is energized when a line selector is checked on the subscriber line that is to be connected to the telephone service. 9. Circuit arrangement according to claims 3 to 8, characterized in that the occupancy relay (C) switches on the changeover relay (U) to the c-wire of the preselector (/. VW) (Fig. 1). 10. Circuit arrangement according to claims 3 to 8, characterized in that the changeover relay (U) is looped into the test wire (c wire) and short-circuited via a normally closed contact of the occupancy relay (C) (Fig. 2). 11. Circuit arrangement according to claim 10, characterized in that the short circuit of the changeover relay (U) is canceled in preparation for the connection of the telephone order service. 12. Circuit arrangement according to claim 8, characterized in that the changeover relay (U) is excited by the earth potential via the c-wire of a line selector to be checked. 13. Circuit arrangement according to claim 12, characterized in that the changeover relay (U) switches on the telephone order service to the voice wires. 14. Circuit arrangement according to claims 1 to 13, characterized in that a second winding of the changeover relay (U) is connected as a counter-winding in series with the subscriber station. 15. Circuit arrangement according to claim 11, characterized in that the changeover relay (U) energizes a control relay (K) which cancels the short circuit of winding II (counter-winding) of the changeover relay (U). 16. Circuit arrangement according to claims 1 to 15, characterized in that is in response to a call even turned on by the turned-on to the answering service subscriber opposite winding of the Umschalterelais (U) and the excitation of the Umschalterelais (U) offset by its winding I. 17. Circuit arrangement according to claim 4, characterized in that the one Speech vein excited occupancy relay (C) to produce the idle state via its own Contact (Ic; 14c) also connects to the other speech wire (e.g. α wire). 18. Circuit arrangement according to claim 12, characterized in that the changeover relay (U) controls a time-dependent relay which causes the connection to the telephone order service only after a certain period of time. - 19. Circuit arrangement according to claims 12 and 18, characterized in that the changeover relay (U) or the time-dependent relay influences a caller who causes the connection to the telephone service. 20. Circuit arrangement according to claim 19, characterized in that the time-dependent Relay only turns on the call service after checking the caller. 21. Circuit arrangement according to claims 1 to 15, characterized in that the switching points (4 c to 7 c or 13 c to 16 c) between the subscriber circuit and both the telephone order service and the switch relay (U) are connected to the subscriber circuit test . Considered publications:
German patent specification No. 1 007 381. 1 sheet of drawings © 909 787/91 4. 60-