DE1156119C2 - Circuit arrangement for telecommunications, in particular telephone systems, in which the connection paths are checked for their occupancy status - Google Patents

Description

3 4

the test relay is effective during the test process; is the one change in the marking of the intermediate

If the test wire is interrupted, the test relay is prevented from being in the line condition during the setting time.

not effective. In the event of a contact disorder or the.

a wire break in the test and occupancy current - Simultaneously with the link test or circuit, no double connection can be established 5 also after this the test for free relay coming, sets RA or free inputs EGW for group

In the figures, an embodiment of the option GW is carried out. To this

Invention shown. The purpose of this is the test relay Fl ,. .., PlO

Fig. 1 shows an overview circuit diagram of a provided, of which the test relay Pl on the other

Part of a centrally controlled system, and io interpreted input EGW of group selection level GW

Fig. 2 shows the checks for understanding the invention. The test relays P1, ..., PlO are now like at

essential switching elements of couplers of two known test circuits switched so that they

Change option levels and a central setting set for their status, if they click on a free input

these couplers. Check gear EGW . However, you can also use

The participant TN of FIG. 1 is not responding through its partial 15 free entrance EEC when to

subscriber circuit TS with a coupler of the partial intermediate lines that have access to this input

subscriber choice level TW connected, which are occupied like a double ZL and if accordingly the

operating selector works and a set of intermediate line test relays, e.g. B. ZPl, address

ES-TWITGW is set, which is also used for setting and their response circuits with contact 2zpl

opening of the incoming upstream coupler of the 20.

Subscriber group selection level TGW is used. The part- The test relay, eg Pl, of the first free taker TN is reached arriving via a routing EGW in the group selection level speaks via device KL, which has access to a relay set RB , its winding I, closes with its contact that of the Participant group selection stage TGW pre-IpI is a holding circuit via its winding II net and serves, among other things, as a feed additive for the arriving participant TN and at the same time prevents the coming into effect. The divider holding circuits.

After these test processes, where there is still a flowing traffic as a two-stage coupling field with the verification of the voter input EGW an coupling stages KS1 and KS 2 is designed for the receiving group selection stage TWG . In the can close, the marker relay M is the first coupling stage KS 2 but are also coupling 30 free intermediate line, which have access to a free point via which it has via selector input EGW , via contact chains of the intermediate lines ZL connected couplers Partial relays ZP and P energized. In the case under consideration - subscriber selection level TW receives access to an outgoing free intermediate line, ZL, free voter input placed relay set RA . The relay set RA is EEC - the marker relay Ml is excited via the one input EGW to the next selection level GW after 35 contacts 2p 1, 3zpl. It continues to be organized via its own contact ImI controlled by an adjustment set ZsSGPF and marked with its Konwird. Via the selection level GW , 3ml, 2ml, for example, the coupling relay to be switched on will clock an outgoing line GL or the line KL er KU of the subscriber selection level TW and the switching relay K 11/2 of the second coupling

In FIG. 2 are the pilot wires c, d of the sub-level KS 2 of the subscriber selection level TGW. The latter participant selection level TW with the participant group speaks first via the contact 3ml and an intermediate line ZL connecting the selection level TGW to common marking contact g and connects shown. It is assumed that from the partial by closing its coupling contacts under andenehmerstelle 7W (Fig. 1) an outgoing connection rem its coupling contact 1 k 11/2 the wire c is to be established. By lifting the receiver on the 45 intermediate line ZL with the relay set RA. The subscriber station is an incentive to the subscriber link test relay ZP1 thereupon speaks to circuit TS and via this to the setting record and gives an acknowledgment for the previous free ES-TW / TGW . The intermediate line test be the intermediate line ZL. A common acknowledgment relay PQ ge intermediate lines, z. B. ZL, switched on. Since there is no potential at the contacts 2ml of the setting of the wire c of the assumed free intermediate line set ES-TW / TGW and 1 ts of the subscriber switch ZL, the subscriber status is not due to the coupling relay KH marked with its connection TS Changing intermediate line test relay ZP 1 selection level TW switches on with its contact Ipq, the status "free" of this intermediate line ZL mar- With response of the coupling relay KIl is indicated under. Responding link test relays 55 with the coupling contact IML closed. After holding against each other until the setting set is triggered, the setting set is triggered by the coupling ES-TW / TGW via its own contact, the dar- relay via its relay ZPl located in the c-core via its contact lzpl to lungs II .

1 sheet of drawings

Claims (2)

1 2 Claims: Achieving a free output via an internal, i.e. not via the selector arm to the tested switching 1. Circuit arrangement for telecommunication, ins- member running circuit. However, this has special telephone systems in which the test has the disadvantage that in the event of a fault, which results in a circuit breaker via test circuits on occupancy 5, circuits of connection paths are switched on and all of the lines rotating over this disturbed line are switched on and only with their Occupied state on- Check the dialer there and stay there, and that speak, however, both in their free state with the help of test relays between free state and in the event of a circuit break in the event of a fault in a line, test and occupancy circuit for the respective io can, since the test relay The connection path already tested during the test process remain ineffective and either a change in the status of the test relay required to switch through the connection or the evaluation of a status retention via this connection path for the purpose of acknowledgment not without switching action bring about, thereby additional switching means would be possible,
indicates ": that the test switch means 15 is also from the German Auslegeschrift (ZPl) after connecting to the test wires (c) 1 093 421 a circuit arrangement for telephone connections (ZL) and after a through private branch exchange with separation of the setting and the PrüfschaltmitM Established through-switching speech paths are known, in which in the switching fields of a connection path (ZL) via the test, one relay for each intermediate line is provided in wire (c) of this connection path from one of the above-described ways Intermediate line relay is in the free state of the device (RA), a switching indicator has dropped out over the intermediate line and marks the connection of the connection path (ZL) through the intermediate line as free signal for the com If a connection is switched through, then switching is released at the same time. one of the relevant switch coordinate 2. Circuit arrangement according to claim 1, that and associated with the respective switching rod characterized in that the test switching means actuated test rod contact, the switching state of which is taken over by the intermediate line relay from (ZP 1) a common acknowledgment switching means. After (PQ) is assigned that the effective further connection through-connection is thus the intermediate through-connection of the connection. line relay of the newly assigned intermediate line addressed and marks it as occupied. the ■ _: .. A free intermediate line is selected through a provision kit. In known telecommunications or telephone systems 35 The invention is based on the object with test switching means for free-busy test. Expenditure on link, occupancy or the test switching means are located in front of their connection, similar relays, which are used to connect the free to the connection path to be checked in a state of connection paths correct switching status. Is it z. B. serve at potentials on their occupancy circuits, these test switching means around test relays, they are to be saved in 4 ° and at the same time to avoid that faults this switching state has dropped out; they speak against it, statements on the test and occupancy circuits apply if they can come about in the occupancy circuits of free double connections. Connection paths are switched on. This task is achieved in that the test Such a change in the state of test relays with their connecting means after connecting to the test leads circuit to the occupancy circuit of a free 45 of the connection paths and after one through the To be able to bring about the connection path, test switching means must switch through a the free connecting paths carry a potential. The connection path via the test wire of this connection particularly in the case of relay made up of relays, requires one of the communication paths via this connection path Intermediate line systems for each intermediate line, switching equipment achieved a switching indicator a link relay. 5 ° about the successful connection of the connection The invention relates to a circuit arrangement received away and therefore respond and a for telecommunication systems, in particular telephone systems, in an acknowledgment signal for the which test switchgear deliver to the circuit via test circuits. laying circuits of connection paths. In an arrangement according to the invention are switched and only when they are busy 55 a free connection path, z. B. an intercom, on the other hand, both in their free state and line, not with a mark of this state as well to be occupied in the event of an interruption in the circuit of the tester. The test switch and occupancy circuit for the respectively checked gives by its change of state after through-switching connection path remain ineffective and thus the establishment of the connection an acknowledgment that the to switch through the connection via this connection path was actually free and no disconnection path The necessary switching measures had been broken in the test and occupancy circuit, bring in. The particular advantage of this is that 'pei It is true that circuits for rotary selectors of a test (whether free or occupied) have already been established, in which, when searching the exits, it is possible to determine whether the test wire is free, occupied or not - as usual - on voltage, but 65 is broken: If it is free, the test relay remains open Check that the outputs are de-energized. rend of the test process is ineffective, but becomes after In this case, however, speaks during the test before the test, namely when the set outputs short-circuited test relay effective on connection path; if it is occupied, it will