SU71184A1 - Device for communication urban PBX machine system with long distance PBX - Google Patents

Description

The currently existing M5i telephone networks of the Krasna Zararya automatic telephone station make it possible for them to automatically communicate with the automatic telephone station of the stepping system, the instruments of which operate under the direct influence of the subscriber disk pulses.

The proposed communication methods, involving or not involving alterations in the register, resolve the issue of joint operation of these exchanges within the same city, but do not allow automatic long-distance communication, since inter-subscriber subscribers are not included in the numbering system of this city, and the automatic telephone exchange of the machine system do not bark the opportunity to transmit pulses through the cord.

The present invention provides a device for eliminating this drawback. Its principle is based on the fact that after dialing the code that determines the machine user’s PBX subscriber’s desire to go to the long-distance direction, the PBX equipment of the touch-line long-distance communication system is connected to the subscriber circuit, from which the subscriber receives a second station response buzzer; at the same time, the subscriber becomes the subscriber of the PBX system of the step-by-step system, while the devices of the PBX can be switched off.

The proposed device is characterized in that switching is carried out automatically by a free reverse search of the calling party’s lines by supplying tonal frequency currents to which relays in the lamp circuit are responding.

The drawing shows (with conventional designations) a schematic diagram of the proposed device, built on the assumption that no more than 10 exits to a long-distance network are required for 100 subscribers of the automatic telephone exchange of the machine system. The field of call finders IV of every 100 subscribers of the automatic telephone exchange of the field system is in parallel connected with the field of 100 contact rotators of the fiBix stepper call finders of MVS, the number of which is determined by traffic. Each IVH is rigidly connected to the group step finder} GI.

A small capacitor of the order of 10,000 µmkf is connected to the wires from each subscriber line. The second output conductor from the plates of the subscriber capacitors of the given hundreds are connected together and connected to the corresponding contact of the vertical field of the elevator / rotation finder, which is the distributor of the call center calls and installed in the quantity of one for each thousand subscribers.

In the RV circuit, there is a tone frequency generator of 10,000 Hz, two test relays B and G operating in tube schemes, a usual test relay E, and a call distributor finder I with brushes I1 and I2, with which the RV is connected to the wire from the subscriber. If you want to get a long-distance connection.

In all current distributors of call seekers - TIV and current distributors of group-TIG ATC searchers, between the windings of the РИ1-РИЗ relay and РГ1-РГЗ relays, capacitors of about 10,000 microns are installed to create the end-to-end path of the HF tone frequency. If the main frequency of the sample current, growing in the relay circuit, is considered to be about 50 Hz, then the capacitor resistance will be about 300000 ohms, which will not affect the operation of the test relays, the size of these emergency cables is extremely small and their placement is not presents no difficulty.

The operation of the circuit is as follows.

The subscriber of the automatic telephone exchange of the machine system wishing to receive a long-distance connection, after connecting the IW and the register, dials the number of the special frame allocated for this on the network by the outgoing group CID seekers. On several lines, depending on the traffic, in the frame of the IG VC. There is a set of waiting relay PB. When the IGR rake occupies this set, the relay P is triggered and the contact P switches on the finder I. When the finder brushes are installed on the contacts of this kit, the test relay / triggers and the contact останавлив stops the finder. By contacting the GZ through the impulse, the lifting magnet is activated. Well, the call distributor.

By brushing the vertical gender of the call distributor, there is a hundredth group in which the subscriber is included.

When the brushes stop at the contacts of a hundred, on the grid 182

the lamp is supplied with a voltage from the tone generator through a wire with a voltage; as a result, the first winding of the brobnical relay B operates in the anode circuit of the lamp and contact 61 terminates the circuit. The contact 62 closes the circuit of the second winding of the relay B. The latter is blocked and by the contact 64 it grounds the common point of the capacitors to eliminate the parasitic circuits during the search process at the next stage. Contact 63 turns on the rotational magnet Doo of the call distributor, which, when moving along brush C, searches for a free set of IVH-} HN. The sample circuit passes through the contact of the holding relay L5 and the contact K.1 of the 1G lifting.

With a free output, a test relay is triggered, which, by contact el, breaks the rotation circuit, contacts e2 and switches on the second test relay G and its lamp to the circuit with wires, and contacts eZ to turn on the rotation magnet IVS. When the IWS brushes are located on the caller, relay G activates and contact G interrupts the rotation circuit, and contact G2 switches on relay L, which operates and closes its contacts. Contacts L and L2 connect two windings of relay L to subscriber's loop, and contact LZ turns off the third winding of relay L. Under the influence of these three windings, relay A triggers and removes the shunt from relay C, which will work and contact the secondary school locks relay L.

From the plus provided by the contact L4, the relay RI1 is bypassed and all the instruments of the automatic telephone exchange of the machine system come to the initial position. The subscriber receives the second buzzer from the 1GI circuit, which in this case is the usual step finder.

In the call distributor, the PB, after releasing the relay P, releases the relay G and the contact tip Go closes the return status of Du.

When the searcher returns to its original position and closes the lift contact / C, the call dispenser can serve the following connection.

Subject invention

A device for connecting urban PBXs of a machine system with a long-distance PBX, providing for the connection to the caller’s line after dialing them: the PBX code of a long-distance telecommunication system of instruments that allow one-to-one transmission of pulses, instead of the main instruments that do not allow this end-to-end transmission, which means that the switching is carried out automatically by a free reverse search of the caller’s line, marked for this by tonal frequency currents, to which the response t test relay finds schies circuit lamp circuit.

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