DE833371C - Circuit arrangement for telephone systems with dialer operation and connecting lines, over which connections of various types are made - Google Patents

Description

Circuit arrangement for telephone systems with dialer operation and connecting lines, which connections of various types are established in telephone systems with voter operation, especially large systems with a large number of exchanges, which are connected to each other by connecting lines and in which connections are set up automatically across several exchanges, is used with Establishing a connection in an exchange usually used by a voter Setting used in the desired direction. About this direction selector are Outgoing trunk group can be reached in different directions, and after setting of the direction selector to a certain direction, a free selection is made Management from the selected bundle by the same voter or a subordinate Free voters. Via these lines selected in this way, of course, very different types of Connections run; those that originate in the same exchange or in exchanges of the same district, and others from distant Switching centers come in and for the relevant switching center only represents a transit office. As a result, these compounds also have one very different values. The voters occupying such a bundle of lines but with the circuits known up to now have no way of distinguishing whether your occupancy is a local or one from your own Bezirksne.tzgruppe originating or a remote occupancy.

This is often the case in times of heavy traffic enter, that all lines of a bundle are busy and that an incoming high-quality one Connection that is to be further established in this direction is not passed on can be. But even with connections of equal value, the need may exist be anchored from certain directions (»existing connections as quickly and unhindered as possible build up.

The invention provides a solution to this problem which makes it possible to give priority to certain incoming connections. These Solution ordered according to the invention that the same with simultaneous occupancy Line bundle from several directions the selection of a free line by the Free voters assigned to this bundle in favor of one from a certain direction incoming connection with all other, set to the same trunk group Connection devices up to the checking of the incoming from this preferred direction Connection to a free line in the bundle is blocked.

This' measure alone to prevent free elections while hiring of the voter (read out desired trunk groups in all cases unhindered makes it possible to achieve the desired effect with very little effort and the simplest! means to achieve. For this, everyone has the choice of certain ones Line bundles (Richttingen) causing selector switching means assigned through a different occupancy of the selector for preferred incoming connections take effect and the different influencing further over a particular one Test arm of this selector connected to the stepping dry circuit of the free voter magnet result in controlling switching means. This test arm passes over a contact bank, whose connections each identify a line bundle or a direction and with all the connections of other such voters featuring the same bundle are switched multiple times. The switching means controlling the voter magnet are now so connected to this test arm that with simultaneous adjustment of two or several voters on the same trunk group initially only in the voter of the Free selection process can start through a preferred connection was occupied.

In long-distance switching systems with so-called waiting time traffic, in which a repetition for a limited time if all lines in a bundle are busy of the search process takes place, with an arrangement of the type described easy way also a constant turning of the voters in your mentioned busy trap_ be avoided. This advantage is achieved in that each line bundle a switch-off relay is assigned, the different with a L m switch contact Potential to the multiple line characterizing the bundle in question and so when all lines of the bundle are busy via those connected to the test arm Stetterschaltmittel a startup of all free voters prevents access to this Leituigsbündrl liabcii. The voters remain on the line bundle in question and wait to select the individual line until one becomes free. It goes without saying that the waiting time is tiled by the same switching means that otherwise limit the search time, limited to the permissible amount. Another advantage This arrangement consists in the fact that after a Leitgig becomes free, initially only the or the Wiihler anlaufcii, who are evidenced by the preferential aliznfc, local direction and only after these preferred connections have been passed on, do the remaining voters approach can.

Further advantages associated with the arrangement according to the invention emerge from the following description of an exemplary embodiment. This is a Finite Selector Operation of the type mentioned above is based on a Fertivermittlungssvstein laid, Iwi then in the individual, in the course of the Verhiiidtnigsarifhaus zti continuous \ 7erniittltingsteile (@n a Richtuiigswäliler in some way, e.g. by evaluation the IZufnuniner recorded from a memory and identifying a certain office, set to a bundle of loops extending into the desired drawing whereupon a free voter to select a free line from (lein relevant Bundle is initiated. The illustration shows a circuit of one of these Voter device, hereinafter referred to as \ 'network group selector (NGII'), shown, with only the circuit details necessary for an understanding of the invention are reproduced. Füt de ii directional voters and the nacligeor (liie do free voters are simple rotary selectors, but it can also be any other selector construction can be used in a 1? unit group selector and free selection is possible, as is the case with rotary dials, for example.

In detail, the arrangement is as follows: If the \ ctzgrnppcüw @ ililer is occupied by an incoming connection, tlic has its origin in the assigned local sanis or in a X'ei-niittltnigsstelle of the same @district network group, then ini upstream t- Transferring the occupancy potential to the (-wuller. In Netzgi-tippenwülller the relays C and .4 respond Direction selector RII 'can be used on an outgoing trunk group in the direction of the desired destination or can be stored in a memory that carries out a corresponding calculation in a direction digit. The way in which the direction selector is set is irrelevant for the purpose.: Compartment Setting ring (les direction selector responds to a relay PI, not shown, and puts its contact p, 1I 11111, wodurc h on the one hand the rotary magnet DRII 'of the direction forest is switched off and a circuit is prepared for the Dreliinagnet DFIF of a free voter. I) The closing of this circuit depends on various prerequisites.

Assuming that there are free lines available in the activated 1_citnngshündel, then a relay Sp connected to a special test arm of the direction selector according to the invention cannot respond because its winding is connected to voltage on both sides: -, Sp (6/5), fb 1I1, p1 I, d arm of the direction selector RYI "in the set direction, ar, Wi, -.

Since relay Fb is not energized in this case, the circuit for the rotary magnet DFW is closed via -1 -, c 11I, p2 I, p1 1I, sp, fb I1 i, b fw, DFW, -. The free voter starts up and checks for a free line in the bundle, with the test relay P2 responding and stopping the free voter by interrupting the circuit for DFIY. If, however, at the time at which the direction selector is set to the desired direction, all lines in this direction are already occupied, a switch-off relay Ar assigned to this direction is energized, which with its contact arl the negative potential of your corresponding bank contact in the auxiliary contact bank of the Direction selector switches off and creates earth in its place. Relay Sp responds before the circuit of the free voter magnet is closed by p1 1I, and opens this circuit at sp. As a result, the free voter cannot start. I? R remains in its rest position until a line in the bundle is released, relay Ar drops out and thus also causes Sp to drop out. This waiting time is practically limited by a time switching device, not shown, in order to avoid an inadmissibly long occupancy of high-quality connecting lines.

There was no considered the 'case that the network group selector \ on, one from the remote network level here inbound link is borne. In this case, the assignment takes place via a wire c '. In this, in addition to the occupancy relay C, there is also a relay Fb that responds and, by switching its contact / @ b fIl, places another low-ohmic and earth-lying N @% ickluiig of the relay Sp on the special test contact arm d of the direction selector RW. At the same time, the contact fb II i is switched over in the circuit of the free voter magnet. If there is a free line in the line bundle selected by the direction selector in this case, relay Sp to speaks via -f-, Sp (i / 2), fb III, p1 I, d-arm of the direction selector RW, ar, Wi, -. By moving sp, the following switching circuit for DFW is now closed: +, c III, p2 I, pI.II, sp, fb II i, b fw, DFW, -.

While both relays Fb and Sp are de-energized during district calls, in long-distance calls, the activation of the free voter is precisely due to the excitement of both relays. This switching method is for the following description of the processing the preferential switching of long-distance connections is important. First be however, briefly outlined the case that all lines are occupied with remote seizure being found. Since ar, is turned over and earth to the test contact of the selector RW puts, Sp is short-circuited and cannot respond. With the relay Fb and If the relay Sp is de-energized, the switching circuit of the free selector is interrupted, and the waiting time described above begins. If a line becomes free, speak Sp on and thus causes the free selector FW to start up.

If a district network call and a long-distance call come in at the same time and are both to be forwarded in the same direction, and if free lines are available in the relevant trunk group, then after setting the two direction dials to the desired direction for the direction dial occupied by the district call, this is the case Relay Sp with its winding at minus potential is placed on the d-arm of the direction selector, while the direction selector occupied with the long-distance call has the low-resistance winding at ground potential on the d-arm. Since the switch-off relay for this bundle of cables is not energized at the same time, the following circuit is formed - in the network group selector (long-distance call), Sp (i / 2), fb III, p1 I, d-Arm RW, d-Arnl RIt '(district call), pi I, fb III, Sp (5/6), -aY 'WZ' @ - . Since 11 "i has a higher resistance compared to Sp (5/6), both Sp relays respond in the above circuit. In the network group selector occupied by the district call, the activation of the selector magnet \ # is prevented, in the remotely occupied network group selector, however, the free selector FU runs 'because Fb is excited in addition to Sp. As soon as the free selector FYt' has checked for a free line, P2 responds, stops the selector and, with p2 fII 2, interrupts the holding circuit of the relay Fb, which as a result of a short circuit in its other winding p2 III i drops with a delay. When Fb drops, the winding of Sp, which is at negative potential, is connected to the d-arm of the Rill direction selector by turning fb III. Both SA relays drop out, so that the network group selector occupied with the district call can carry out his free election.

If, when testing two such connections of different values on the same bundle of lines, all lines of the same are occupied, i.e. relays Ar energized and ar, switched over, the test circuit is as follows pi I, fb III, Sp (5, '6), -.

Sp (1 / z) in the remote network group selector is short-circuited and does not respond, Sp (5/6) in the district-occupied network group selector is energized. Since the relay Fb is energized in the first network group selector, but not in the latter, neither of the two free selectors can start. Both are waiting for a line to become free. As soon as one becomes free, the earth potential is replaced by negative potential at the multiple, whereby Sp (r / 2) of the remote network group selector responds and starts its free selector. Sp (5/6) in the district-occupied network group selector remains energized and blocks its free selector, as in the case of free lines described above, until the long-distance call is passed.

This preferential dispatch from a certain direction incoming Connections is not limited to any particular incoming direction. Also can Cases arise in which a preferred connection establishment also for certain District talks, i.e. equivalent connections in and of themselves, is desirable. This is feasible at any time, depending on the needs at hand, by referring to the different assignment of the network group selector for such incoming connections Makes use of which the different ways of working of the free voters inevitably arise results. It is also possible to send individual outgoing trunk groups from a different one Optionally connect treatment by taking this from the special test multiple turns off. The network group selector can easily track the location and time can be adapted to different requirements.

The invention does not apply to the toll switching systems described above respectively. . Telephone systems with connection traffic are limited, but can e.g. Belly Use in private branch exchanges for the preferential handling of certain subscribers Find.

Claims (7)

PATENT, CLAIM: i. Circuit arrangement for telephone systems with Voter operation and several exchanges where the same trunk group Connections of various types run, characterized in that at the same time Allocation of the same trunk group from several directions the selection of a free one Management by the free voters (FW) assigned to this bundle in favor of one Incoming connection in a certain direction for all others, to the same Line bundle discontinued connection devices up to the checking of the this preferred direction incoming connection to a free line of the bundle Is blocked. 2. Circuit arrangement according to claim i, characterized in that the connections to be preferred by different occupancy of the selection of the relevant outgoing trunk group responsible voter (RW) are. 3. Circuit arrangement according to claim i and 2, characterized in that each voter serving to select different trunk groups (directions) Switching means (relay Sp) are assigned, which via a special test arm (d) this selector depending on other, on the different occupancy the selector-dependent switching means (relay Fb) influenced in various ways are, and that both switching means (Sp and Fb) together on the control circuit of the Act free voter (FW). 4. Circuit arrangement according to claim 3, characterized in that the switching means (relay Sp) assigned to the selector (AW) has two windings, one of which is at the negative potential, the other at the positive potential, and that via contacts of the occupancy of the selector dependent switching means (Fb) one or the other winding is placed on the test arm (d) of the selector (RW), whose contact bank has a common multiple with all other selectors who have access to the same line bundle. 5. Circuit arrangement according to claim 3 and 4, characterized in that the switching circuit of the free voter magnet (DFW) can only be closed if both switching means (Sp and Fb) either energized or de-energized. 6. Circuit arrangement according to claim i to 5, characterized by such an arrangement of the switching means controlling the switching circuit, that when all lines in a bundle are busy, regardless of the type of assignment of the voter (RW) the free election is prevented in any case. 7. Circuit arrangement according to claim 6, characterized in that the blocking of the free choice when all lines of a bundle are busy by applying a blocking potential, for. B. earth, to the multiple line characteristic of the bundle in question with the help of an energized cut-off relay (Ar) is effected in this case. B. Circuit arrangement according to claim 6 and 7, characterized in that the switching state prevailing when all lines are busy of the switching means (Sp) controlling the switching circuit of the free selector when a line of the bundle becomes free due to the associated drop in the switch-off relay and the disconnection of the blocking potential only in the voter assigned a preferred connection to be processed experiences a change in the sense of a release of the free election. G. Circuit arrangement according to Claims i to 5, characterized in that the blocking of the free selection for the selectors occupied by connections not to be preferentially processed after checking the selector occupied with the preferential connection to a free line by switching over the circuit running over the special test arm (d) is canceled from one to the other winding of one switching means (Sp). ok Circuit arrangement according to Claim 4, characterized in that the winding of the one switching means (Sp) which is at ground potential is low-resistance and, if the selector is occupied, by a connection that is preferably to be cleared and, if there are free lines in the bundle being controlled, through to the relevant multiple line in this case a higher resistance (Wi) applied negative potential is excited. ii. Circuit arrangement according to Claims i to io, characterized in that, optionally, individual outgoing trunk groups (directions) can be excluded from the preferred dispatch. 12. Circuit arrangement according to claim i to io, characterized in that in addition to higher-quality connections arriving from the long-distance network level, other connections, e.g. B. from the district network level through incoming connections, assignment of the corresponding occupancy type, the same priority can be granted.