DE1111679B - Circuit arrangement for telephone systems for switching subscriber lines to the telephone order service - Google Patents

Description

Circuit arrangement for telephone systems for switching subscriber lines to the telephone order service The invention relates to a circuit arrangement for connecting subscriber lines to the telephone order service in telephone systems.

It is already known to switch over the connection line of a subscriber to the telephone order service by means of a differential relay which is built into the subscriber circuit. The differential relay is controlled by the subscriber giving an earth pulse, who is provided with a telephone with an earthing button (German patent specification 969 865).

Another known method for switching a telephone connection to the telephone order service is to produce the switching by inserting a cordless isolating plug into the jack of an isolating plug-in distributor assigned to the telephone connection to be switched. In this arrangement (German patent specification 969 865), switching back is done by pulling out the isolating plug.

Another known method provides special service group selector, via which the subscriber, by dialing a certain code number, occupies a service line selection device, which establishes a test circuit to the main distributor via further switching devices in order to determine the subscriber who initiated this switch. The disconnection of the telephone order service is effected by actuating an earth button attached to the subscriber's telephone station (German patent specification 969 865).

Another known method for connecting the telephone order service takes place in that the subscriber who wishes to be connected to the telephone order service, by selecting a code assigned only to him, controls a switch relay that switches the speech from the line selector to the telephone order service. The speech wires leading from the line selector to the subscriber have been prepared for switching by inserting a cordless isolating plug into the isolating connector. The disconnection from the telephone order service takes place (German patent specification 969 865) by dialing the same or a different code number.

According to another known method, a voter in one of the last dialing levels of the telephone network is connected to a switching transmission that sends one or more indicators backwards over the established connection path, which are sent to an evaluation device as an incentive to switch the subscriber's own switching paths. The telephone order service is switched off in the same way (German Auslegeschrift 1000 875).

The disadvantages of the known arrangements are that either a telephone with a grounding button and thereby an additional wire for the connection line are required or special personnel must be used for the switchover, so that the switchover, especially when the voter exchanges are unoccupied, does not occur at any time, i.e. H. at the point in time desired by the subscriber, or more or less complex facilities are necessary in order to determine the identity of the subscriber by checking processes and to avoid misuse of the switching devices.

The object of the invention is, on the one hand, to avoid the disadvantages of the known arrangements and, on the other hand, to trigger an automatic charge counting during the switchover, which would have to be initiated by the officer in the event of a non-automatic switchover. This object is achieved in that in a selection level of the telephone system, preferably in the line selector level, after dialing their own number relays are effective, which on the one hand hold the occupied voter of this selection level when the connection is triggered by the calling subscriber and this selector for the purpose of a Call again on the marked subscriber line. let and the other hand control more relays that a fee determination by multiple, z. B. cause twice, influencing the counting relay in the first group selector, and that further relays are provided, which after dialing a further code number (z. B. the number 0) by the participant who answered the call of the voter by picking up the handset of his telephone To influence an electromechanical switching device for switching the telephone order service on and off via an auxiliary arrest of the voter.

According to a further embodiment of the invention, the officer after dialing the subscriber line via the designated voter of the last Option level, in particular the line selector, the subscriber connection through control switch the electromechanical switching device to notification service.

Furthermore, the invention can be designed so that if there is no answer of a call of the voters freio ", is switched and that when the call is answered an automatic announcement for indications inductively on the subscriber's connection line is switched.

The invention will be explained in more detail with reference to the figure. All Circuit details that are not necessary for understanding are the better n overview has been omitted.

The wires 5 a, 6 b, 7 c 1 and 8 c2 of the line selector LW are connected to the outputs of a selector, not shown, of the upstream selection stage, eg. B. with the outputs of a group selector connected. Via the switching arms 105 to 108 , the line selector LW is set to the wires 110 a, 111 b, 112 c 1 and 113 d of the subscriber circuit TS. The voice wires 5a / 6b and 110a1111b are inductively switched through via the local line transformer OLü. The line selector LW can be reached via the existing dialing network of the telephone system if it is used in place of the line selector of the usual type, which are not set up according to the invention for automatic switching to telephone order service, or via a special telephone order service network. This telephone order service network can preferably only consist of a single connection path per dialing system, since it is only required for the duration of the switchover. There is no need for free selection in the group selection levels, so that 100 outputs are available for selection per group selector. The number of group diggers is reduced by more than 90% compared to electoral levels with free choice.

If a subscriber applies for the switchover of his telephone connection to telephone order service for the first time, his subscriber circuit TS is wired to an electromechanical switching device S. This switching device S consists z. B. from a remote-controlled switch of the smallest dimensions (cam switch, rotary switch, pressure switch), which is individually assigned to the subscriber line and can be controlled by pulses. The connection to the telephone order service is established via his contacts. As a result, the subscriber's subscriber circuit TS is prepared once and for all for switching to the telephone order service - the telephone order service circuit remains an integral part of the subscriber circuit - which the subscriber can do himself at any time. This is done in the following way: The subscriber selects his own connection number - in the case of a special telephone order service network.eine code, e.g. B. 119, and its port number.

In pre-select the key figure 119 per one overall effected fees fixed position in the switching on and off of the telephone order service. Every assignment of the line selector LW is counted as a local call. When dialing a code that begins with the number 0 , e.g. B. 05, however, there is the possibility of multiple counting by switching the relay Z in the L GW by means of the directional contact of the L GW to receive the counting pulses to the b-wire, as in the case of self-dialing remote service. In the present case, multiple counting, namely double counting, is to be described.

When the line selector LW is assigned, the assignment relay C. excited over the occupancy vein. With its contact 50c it prepares the response of relay B.

After the selection has been completed, a relay G , not shown, is energized, the contact 40g of which switches on relay B.

1. +, 50e, 41ph, ..., 40g 39el, B, After checking the line selector LW on its own subscriber line, the busy signal is switched on inductively via the local trunk line transmitter OLü to the speech academy 5 al 6 b in a manner not shown.

The contact 29b closes and prepares the catching process for the first group selector L GW to ensure the counting by switching the earth potential to the speech wire 5a. By closing the contact 66b , the relay X and the counter relay Z in the first group selector L GW is switched on. 2. +, Z, ..., 6h, OLÜ2,21Dr, 66b, 67, 68, 72y, X, -.

The contact 90 b had prepared the excitation of the selector relay WR, which occurs when the contact 91x closes. As a result, the switching arm 67 of the selector relay WR switches from position 68 to position 69. Relay X and relay Z in the first group selector L GW are de-energized. The call counter of the subscriber line advances by one charge unit in a manner not shown. When relay X drops out, contact 79 x closes and energizes relay Y. In addition, the counting relay Z in the first group selector L GW is switched on again.

3. +, Z,. . ., 6 b, OL Ü 2, 21 Dr, 66 b, 67, 69, 79 x, Y I, The relay Y holds itself through its own contact 88 y and its winding 11. When the - above-mentioned activation of the selector relay WR by Closing of contact 91 x was also the switch arm. 92 of the selector relay WR moved from position 93 to position 94. When relay Y responds, contact 96y switches selector relay WR on again.

4. +, 96 3 # 94, 92, 90 b, WR, The switch unit 67 of the selector relay WR comes to position 70 and the switch arm 92 to position 95. However, the relay X cannot be switched on again because the open contact 72 y interrupts the circuit. The counting relay Z in the first group selector drops out and causes a second counting pulse for the subscriber's charge counter.

The subscriber hangs up on the busy signal and releases the connection. Except for the line selectorLW, all switching devices are triggered. As soon as the upstream group selector releases the Prüfader7cl, the relay P 2 in the line selector LW responds while the occupancy relay C is held.

5. +, 20f, P211, P21, 13b, 16c1, 26c, CI, C 11, -.

The relay P 2 could not respond as long as there was a current branch to the upstream group selector on the wire 7 cl.

The contact 80 p 2 switches the test relay P to the wire 112 cl of the subscriber circuit TS for a new test process. Since the subscriber is free, the test relay P responds: +. . , 112 cl, 107, 83 GL., 82 Wi, P. 109 wi, -.

By means of a not shown test relay PH, whose contact closes 76ph, and a likewise not illustrated via the contact 77r relay R which is energized and is only switched off when the subscriber answers, ringing current RS is connected to the speech core 110 a. If the participant answers the call, e.g. As lifting his handset so is turned on, the relay A on the subscriber loop, which by opening the contact 65 a to short-circuit its winding I cancels and the opening wire IIIb on by closure of the contact 64a to the Wicklung4 of Ortsleitungsübertragers OL above. The subscriber hears an automatic announcement AS, which is inductively connected to the subscriber line via winding III of relay A. 6. +, 58v2, Alll, 59p, 60p2, AS.

This automatic announcement reads, for example, »Please dial the number 0«. The feed bridge relay A in the line selector LW picks up the pulses generated by the called subscriber by dialing the number 0 and controls the excitation of the relay 172 by opening the contact 49 a.

7. +, 54h, 53p2, 52p, V2, The electromechanical switching device S in the subscriber circuit TS is switched on by the contact 104v2.

8. +, S, 113 d, 108, 100 p 2, 104 v 2, H, 109 Wl, -.

The electromechanical switching device S switches one step further and causes the subscriber line to be switched. The relay H, which has also been switched on, holds itself via its own contact 99h and prevents the relay 172 from being switched on again by opening the contact 54h. This prevents the switch from being intentionally or unintentionally canceled without the line selector LW again to prove.

The disconnection of the telephone order service takes place in the same way, namely by dialing your own number or by dialing a code number and your own number, triggering the connection, answering the call of the line selector and dialing the code number (0).

In order to prevent blockage of the line digger LW by permanent occupancy, the relay F speaks after a certain time, z. B. after 5 or 10 minutes, and opens with its contact 20 f the input circuit of the line digger. The relay C is de-energized and initiates the release process of the line selector LW.

The line selector LW can also be used to switch the subscriber line to notification. This switchover is usually carried out by an officer who dials the subscriber line via a service network. In doing so, the line digger is assigned to test wire 8c2. The relay Cl is energized and prepares the circuit for the control of the electromechanical switching device S with its contact 102 cl . In addition, contact 39 cl opens to prevent relay B from being energized. As a result, the counting does not take place, because the switching off of the counting voltage to the wire 6 b via the contact 66 b does not occur. The Kontakt34cl closes the circuit for The relays, which thus also after Sichmelden of the selected participant in response not shown RelaisZL in line selector LW (opening the Kontaktes33zo remains closed. The officer influenced, eg by dialing code numbers, the relay E via the intercom wire 5a , which with its contact 98e controls the electromechanical switching device S. Depending on the number of pulses and switch positions of the electromechanical switching device S, the various automatic notification announcements can be switched on to the subscriber connection, e.g.

1. "The connection is no longer available," 2. "The connection is currently out of order," 3. "The connection has a different number, please call information free of charge." Subscriber line number and controls the switching device S in the starting position by means of impulses. With the release of the connection by the officer, the line selector triggers LW.

The subscriber himself, whose connection has been switched to "notification" is, cannot undo (cancel) the notification, as it is known Disconnect the subscriber wires at the same time as the notification announcement is switched on the preselection devices are disconnected.

Claims (4)

PATENT CLAIMS-1. Circuit arrangement for telephone systems for switching subscriber lines to the telephone order service and for canceling the switchover in each case by the subscriber himself, in which the subscriber connection is prepared for the switchover by inserting a cordless plug into the jack of the isolating plug-in distributor assigned to the subscriber line or by wiring the subscriber connection, characterized in that that in a selection level of the telephone system, preferably in the line selector level, after dialing their own number relays (C, B, Pl-) become effective, which on the one hand hold the occupied voter of this selection level when the connection is triggered by the calling subscriber and this voter to The purpose of a call can be re-checked on the designated subscriber line and the other hand, control other relays (X, Y, WR) that a charge determination by multiple, z. B. cause twice influencing the counting relay (Z) in the first group selector, and that further relays (V2) are provided, which after dialing a further code number (z. B. the number 0) by the participant who called the voter by picking up of the handset of his telephone answered, influence an electromechanical switching device (S) for switching on and off the telephone order service via an auxiliary arm of the selector. 2. Circuit arrangement according spoke 1, characterized in that if the call from the voter is not answered, time-dependent relays (F) enable the voter. 3. Circuit arrangement according spoke 1, characterized in that when answering the call of the voter by the called subscriber an automatic announcement, z. B. inductively, is switched to the subscriber's connection line, which enables him to dial a code number (e.g. Code number 0) . 4. Circuit arrangement according to claim 1, in particular for telephone systems in which the switch to the telephone order service and / or notification service is carried out by the civil servant, characterized in that switching means (C 1 and E) which can only be controlled by the civil servant are provided, which influence the electromechanical switching device (S) (by means of 98e and 102el). Documents considered: German Patent No. 969 865; German interpretative document No. 1000 875.