DE826013C - Circuit arrangement for telephone systems with dialer operation - Google Patents

Description

Circuit arrangement for telephone systems with dialer operation unnecessarily long occupancy of connection devices if one does not occur Conversation, be it due to the fact that individual connection sets are busy or as a result of the fact that they are already busy It is important to prevent occupied subscriber lines or hunt groups in the case of circuit arrangements known with voter operation, in this case through the already occupied connection set or subscriber line admit a criterion characterizing the busy state, that the re-triggering of the attempted connection establishment in the course of this was already occupied Releases connection devices. The back release is usually used as the criterion the application of earth to the b-wire.

In these known arrangements, the indicator can be used for back release the connection only until the end of the election or until the called subscriber is hung up are given. From this point onwards, they become the criterion for triggering back recording switching means for recording the counting current impulses arriving during the call provided: This can be done, for example, by initially on the one hand voltage-connected counting relay is now connected to earth, so that it no longer passes Earthing of the b-wire, but only by applying voltage to this wire for response can come.

For normal, fully automated local and long-distance traffic However, there is also no need after a successful connection has been established initiate another release. Will; but the connection via plug and jack set up by a remote officer or the subscriber reaches via a Remote login connection the civil servant to help them with the production of the To order a connection, it is advantageous if through the officer after the end of the conversation or after receiving the connection registration, the connection, regardless can be triggered again as quickly as possible by the incoming participant. Just at Systems in which, in addition to high-speed traffic, long-distance traffic with registration is also possible is, the inexperienced telephone subscriber will after registration of the desired connection often want to wait for the remote connection to be established exactly as it was from Is used to fast traffic.

A release initiated by the officer of the leading over her Remote connection or the remote registration connection leading to it now reaches the Invention using the existing to carry out the occupancy release Switching means in that when reporting a called express or long-distance traffic officer the abandonment of an end-of-election sign or a posting message is omitted and at Disconnecting an outgoing high-speed or long-distance connection via the officer, or a telecommunication connection leading to the civil servant by pulling the plug at the workplace Officer the switching criterion of the reverse release is given. According to one embodiment the invention remains the i. Group selector even when asked by the express or long-distance traffic officer in one the recording the switching state enabling the occupancy criterion. By pulling the stopper At the end of the connection earth, the officer is placed on the b-wire and thereby the Release initiated.

As in the hand-operated express or long-distance traffic, the call counting is carried out by the remote official, needs when made by cord Long-distance traffic, the counter relay was not reversed from voltage to earth to become. If the switched long distance traffic is a connection, with the officer briefly on the remote connection for the time the connection is being established is switched on, the line selector of the final office reached will do the usual End-of-election characters given to the i. The group dialer of the calling subscriber arrives and there carries out the necessary switchings in the counting relay, so that with such Remote connections the counting is secured during the call.

The invention will now be based on what is shown in the drawing Embodiment are described in detail.

Fig. I shows a set up for occupancy release i. Group selector and FIG. 2 shows the telecommunications official's workstation. The i shown in FIG. Group selector is occupied by a preselector, not shown, whose test relay checked with positive potential on the first group selector. Through this testing process Relays A and C are energized one after the other in the test wire. The relay A holds to find out about the i. Group selector switched through subscriber loop. The relay C and the test relay of the preselector bind via contact c4 in the c-core. With the contact c i, earth is simultaneously connected to the 3rd winding of the Relay J placed so that this come through the contacts k i and p 3 to respond can, and with his contact i 5 turns on the official signal. This official sign is taken up by the 3rd winding of the feed relay A and inductively to the calling one Participants transmitted. If the participant sends out current surges, the relay will A impulsively de-excited. This means that for the duration of the choice in the test circuit, the Relay V to respond, while relay C remains held. The single ones Pulses are transmitted through the contact a 6 to the lifting magnet of the i. Communicated to the group voter, which adjusts to the desired decade. When the dialing is finished, the relay will A constantly energized again, while the relay V drops. This creates an excitement of the rotary magnet D of the i. Group voter who takes the first step and while its anchor contact d closes. The relay J is through its 2nd winding started and now controls together with the rotary magnet D the i. Group selector in Self-interrupting circuit on a subsequent free connection set.

Special directional contacts rk are provided for certain decades. Three of them are shown in the circuit diagram. i. rko for local traffic, 2. rkf for long-distance traffic, 3. rks for high-speed and long-distance traffic.

The contact yko becomes effective in local traffic to offices of an older type that work without the end of the election and may need control voltage. Voltage is applied to the speech wires via rko i and rko 2 and the counting relay Z is disconnected during the call via rko i. Only when the call has ended is earth connected to relay Z through contact c 3 so that it can receive a counting pulse.

In long-distance traffic with systems without end of dialing and counting during the call, the required switchovers are carried out by the rk f contacts. The contact rk fi applies earth to the relay Z and thereby prepares it to receive the. current surges on the b-wire during the call. The contact ykf 2 makes contact a 3 of the surge receiving relay A effective, which passes the subsequent current surges on to the a-wire.

For the subject matter of the invention, the contact yks is primarily of importance. It is actuated when the i. Group dialer is set to lines that lead to an express or long-distance traffic officer. Does the i. Group dialer on such a line, the relay P is energized via the c-arm and the relay J is delayed drop-out by shorting its winding I. It remains in the circuit -I-, J 1I, i 2, v 4 or z 6, pi, ykf 2, yko 2, ci, earth, for the time being. As a result, the relay Z in the first group selector is also connected to voltage via the contacts rk fi, v 3, i 4, a 3 and c 5 and thus the i remains. Group dialer ready to accept a busy criterion. At the workplace of the officer shown in FIG. 2, the relay C was energized when the test wire was occupied, and with its contact c'4 it causes the call flap AL to light up brightly. If the officer enters the connection, the relay T 'is excited via the jack socket and its plug and the relay C is held via its 2nd winding. By moving the contact t'4, the lamp goes out and the call can now take place or be transferred. If the officer pulls the plug after the end of the conversation while the calling subscriber has not yet hung up, the rapidly falling relay C drops out, while the slowly falling relay T 'remains in the test circuit. Occupying earth is connected to the b line to the i via contacts C'2, t'2. Group selector placed in which the relay Z now responds.

Claims (4)

PATENT CLAIMS: i. Circuit arrangement for telephone systems with Dialer mode in which the busy indicator is recorded and the reverse release introductory: switching means by a given at the end of the election or the start of a call Criterion for receiving any counter current surges are provided; characterized, that when reporting a called express or long-distance traffic officer. the levy an end-of-election sign or an unhooking message is omitted and when separating a outgoing high-speed or long-distance connection running through the officer, or one Telecommunication connection leading to the civil servant by pulling the plug at the workplace the officer is given the switching criterion of the reverse release. 2. Circuit arrangement according to claim i, characterized in that the one for the connection to the civil servant used i. Group voters also when asked by the express or long-distance traffic officer remains in a circuit state that enables the occupancy criterion to be included and only when the stopper is pulled by the officer does the grounding cause the return release the b-core takes place: 3. Circuit arrangement according to claim i and 2, characterized in that that with immediate forwarding of a connection by the express or long-distance traffic officer an end-of-election signal from the distant office is given when counting by multiple counting takes place during the conversation. 4. Circuit arrangement according to claim i to 3, characterized ge'ke'nnmarks that the officer has the reverse release status of the call line through The call lamp is darkened.