DE1171024B - Circuit arrangement for collective and / or multiple connections in telecommunication systems, in particular telephone systems - Google Patents

Description

Circuit arrangement for collective and / or multiple connections in Fermnelde-, in particular telephone systems The invention relates to a circuit arrangement for collective and / or multiple connections in telecommunication systems, in particular telephone systems. The subscriber lines combined to form a hunt group become free Dial checked for its busy status. In addition, it is generally also required that one or more of these subscriber lines can be dialed directly and that no free handover takes place when this line is busy (Night service).

It is known to carry out these tasks with the help of other voter arms or to solve by so-called collective contacts or double collective contacts, through the additional control relays that are only required for hunt groups can be influenced.

Furthermore, there is a circuit arrangement for voters consisting of relays became known where outputs of different decades, the same last Have dialing digits (single relay) can be combined to form a hunt group can and where after controlling the first line of a hunt group the Free selection within this hunt group by reversing the potential using a Slow interrupter is initiated. This circuit also requires the effort additional auxiliary relay.

Finally, another circuit arrangement has become known, in the time between dialing the number and the actual test process through the single relays to which the subscriber lines of the hunt group are assigned are, a preliminary test of these subscriber lines made for their busy status will. For this purpose, special windings of these unity relays are connected via contacts an auxiliary relay to the c-wires of the subscriber lines combined to form the hunt group placed.

Another known arrangement has a so-called number memory, which is connected to a so-called position memory via a patch panel. With The inputs of the patch panel connected to the number memory identify the individual ones Call numbers, while the outputs connected to the location memory are the subscriber lines correspond. In this patch panel there are switchover contacts from relays of those subscriber circuits provided, which - are combined into a hunt group. These changeover contacts form a contact chain that begins with the call number of the hunt group corresponding input of the patch panel and their individual contacts with the relevant Inputs of the position memory are connected.

The invention has set itself the task of the known circuit arrangements for hunt group and / or multiple lines, in which the subscriber selection levels through z. B. the electoral level or a part of the electoral level assigned central members are marked and in which a patch panel is provided that has a. the number of this arrangement associated call numbers corresponding number of marker inputs and a number of test outputs corresponding to the number of subscriber lines and in which to form hunt groups contacts of the relevant subscriber circuits are inserted to further improve or reduce their effort. She is through it characterized that the test outputs belonging to a hunt group, among which a hierarchy is established through the chain connection of the test switch means, via contacts of the relevant subscriber circuits together with that of the call number the marking input corresponding to the hunt group are connected.

According to the invention, the object is to create hunt groups, so solved without additional expenditure on switching means. In addition, there is a choice of the subscriber lines belonging to a hunt group. Advantageous compared to the last-mentioned known arrangement is the reduction in the contact effort and the avoidance of long normally closed contact chains, since they all belong to a hunt group associated test outputs of the patch panel via simple contacts together with a Marker input are connected; the required ranking of the individual test outputs will thereby achieved by the chain connection of the centralized test switching means, the causes several test switching means that may become effective at the same time only one is held.

If all subscriber lines of a hunt group are busy, it is customary to indicate this by means of a corresponding criterion. this will according to a further embodiment of the invention that enables that test output of the collective connection, which in the chain connection of the test switching means established ranking takes the last position, without the interposition of a Contact of the subscriber circuit concerned with that of the call number of the hunt group corresponding marking input is connected. This is because that becomes this one The crosspoint belonging to the subscriber line is switched through in any case, and that The organ subordinate to the participant election level can carry out the busy test in the usual way make.

The figure shows a circuit arrangement according to the invention for a subscriber selection stage with ten subscriber lines. The test outputs PR 1 to PR 10 correspond to the latter. The ordinal numbers of the marker inputs ME 1 to ME 10 correspond to the last dial digits of the call numbers through which those subscriber lines can be reached. In the example shown, the marker inputs MEl, ME2 and ME7 are assigned to individual connections, while the subscriber lines corresponding to the test outputs PR 3, PR 4, PR 5, PR 6, PR 8 and PR 9 are combined to form a collective connection that is connected to the marker input ME4, ie through the last dial number 4 can be activated. The subscriber line assigned to the test output PR 5 is provided for receiving the night calls and for this purpose is reached via the marker input ME5.

Only those essential for understanding the invention are shown in the figure Parts of the participant selection level shown. The following is the mode of operation of the Circuit described in more detail.

After switching on the operating voltage, the relay U is excited in the circuit (1) earth, la, U, -. This switches a capacitor C, charged to the operating voltage via the resistor R, parallel to its own winding via its contact u and thus creates a circuit in which it drops out with a delay if its response circuit is interrupted and other switching means do not activate a holding circuit before the drop-out delay time has elapsed be let. A test limitation time is determined by the drop-out delay.

The circuit part marked KP represents a contact pyramid represents that by a marker, not shown, in accordance with the last dialing digit be set and after actuation of the contact 1 b negative potential to the marking input selected by the last digit of the call number. To A relay, not shown, speaks when the contact pyramid KP has been set to completion to which contacts 1b and 2b belong.

For a better understanding of the circuit, the choice of a single connection z. B. the subscriber line assigned to the test output PR 1 , which is controlled by the marker input ME 1. After selecting the last digit, a negative potential is applied to the marker input ME 1 via the contact pyramid KP and contact 1b. At the same time, the contact 2 b closes a response circuit for the auxiliary relay A, whose contact 1 a interrupts the response circuit (1) of the relay U. The test limitation time given by its drop-out delay begins. The contact 2 a applies ground potential to a contact chain consisting of the idle sides of the changeover contacts 2p1 to 2p10, via which the relay G responds, which with its contact 2g closes a response circuit for the test relay P 1 connected to the test output PR 1 via a connection set AnS: (2) Earth, 2 g, P 1 (1), AnS, PR 1, ME 1, KP, 1 b, -.

With its contact 2p 1, the relay P 1 creates a hold circuit and simultaneously separates the circuit, into which the relay G was excited. When it drops out, a response circuit for relay Q is closed: (3) Earth, lg, Q, 1 p 10 to 1 p 1, AnS ...

The relays Q and P 1 initiate the connection of the coupling point assigned to the test output PR 1. Furthermore, a circuit for the relay U becomes effective through the contact q, in which the relay U continues to be held even after the test limit time has expired.

If 4 is selected as the last digit, the marker applies negative potential via the contact pyramid KP to the marker input ME4, via which the hunt group is to be reached in the example shown. According to the invention, this marker input is connected via the contacts t3, t4, t5, t6 and t8 of the subscriber circuits belonging to the collective line to the test outputs PR 3, PR 4, PR 6 and PR 8 assigned to these subscriber circuits. As in the case already described for individual connections, contact 2g applies positive potential to test relays P 1 to P 10. This creates circuits in which all test relays initially respond that are connected to test outputs whose associated subscriber line is not occupied (contacts t of the subscriber circuits closed).

By connecting the contacts 2p1 to 2p10 in a chain, the test relays P 1 to P10 are ranked. As a result, only the one with the lowest ordinal number of the energized test relays can hold onto it. The circuit for relay G is interrupted again, and contact 1g closes a response circuit for relay Q. This, together with the energized test relay, initiates the connection of the relevant coupling point.

If all subscriber lines of the hunt group are busy, it is desirable to switch through that crosspoint within the hunt group that takes the last position in the ranking given by the chain connection of the contacts 2p l to 2p10, and in this case by that of the subscriber selection level to have the occupancy check carried out in the usual way. For this purpose, the relevant test output (PR 9 in the example shown) is permanently connected to the marker input of the collective line (ME4 in the example shown) without the interposition of a contact of the associated subscriber circuit.

It has already been mentioned that a certain subscriber line of the Hunt group should be accessible via the so-called night number. If this connection provided for recording the night number is busy, so should there is no free dialing of another subscriber line of the hunt group. in the In the example shown, the night number has a 5 as the last digit. The subscriber line PR 5 is assigned to the test output for recording the night calls. When dialing the night number the marker puts negative potential at the marker input via the contact pyramid KP ME5 and thus causes the relay P 5 in the circuit to pick up.

(4) Earth, 2 g, P 5 (I), AnS, PR 5, Gl2, ME 5, KP, 1 b, -.

The two directional guides Gll and G12 serve to decouple the marker inputs ME 4 and ME 5. The other processes correspond to those described for the control of individual connections.

There is no galvanic connection between the marking input ME 10 and the test output PR 10. This identifies a subscriber line that is not connected. Relay P10 cannot respond when the relevant number is dialed. The relay U drops out after the test limitation time has elapsed and transmits a corresponding criterion to the organ upstream of the subscriber selection stage, in a manner not shown. In this case, there is no blind occupancy of the subscriber switching stage.

Claims (3)

Claims: 1. Circuit arrangement for collective and / or multiple connections in telecommunications, in particular telephone systems, in which the subscriber selection levels by z. B. central members assigned to the electoral level or part of the electoral level be marked with a patch panel that has one of the number of this arrangement assigned call numbers corresponding number of marking inputs and one of the number the subscriber lines has a corresponding number of test outputs and in which for the formation of hunt groups contacts of the respective subscriber circuits are inserted, characterized in that the belonging to a hunt group Test outputs, among which a hierarchy is established through the chain connection of the test switching means is established, jointly via contacts of the relevant subscriber circuits connected to the marking input corresponding to the call number of the hunt group are. 2. Circuit arrangement according to claim 1, characterized in that the for Marking input belonging to the nighttime number within the hunt group via a Directional conductor is directly connected to the test output that leads to that subscriber line heard about which the night call is to be recorded, and that this test output also via a further directional conductor and a contact of the subscriber circuit connected to the marking input corresponding to the call number of the hunt group is. 3. A circuit arrangement according to claim 1, characterized in that that test output of the hunt group which, in the hierarchy established by the chain circuit of the test switching means , the last digit e innimm t, is permanently connected to the marking input corresponding to the call number of the hunt group without the interposition of a contact of the subscriber circuit . Documents considered: German Auslegeschrift No. 1036 935.