SU149129A1 - The method of switching on the telephone in the PBX through a substation - Google Patents

Description

The known methods of switching a telephone device into a PBX through a substation with fixing the state of the subscriber line and speeding up at the PBX and blocking the bend-free line to the subscriber set at the substation require significant power consumption and do not have a high reliability of transmitting control signals to the station (station call, dialing, answering and dialing with reduced line isolation.

To eliminate these drawbacks, a tonal frequency generator is installed in the telephone set, as well as a microphone with a semiconductor amplifier with a low power supply current. The generator, powered from the station, is turned on when the microphone is removed. With this generator, all signals are transmitted to the station.

FIG. 1 shows a diagram of the subscriber’s telephone; in fig. 2 - subscriber kit scheme; in fig. 3 - linear part of EATP (electronic automatic telephone substation); in fig. 4 - EATP station part.

Control of PBX devices is carried out with the help of an alternating current frequency higher than 3400 Hz. The source of this current is a generator of an over-frequency LFO set in the subscriber’s telephone set, which made it possible to reduce the current value of the power supply by an order of magnitude. microphone M and simplify the circuit.

When the subscriber removes the handset's handset from the lever of the telephone set TA, the overtonal frequency generator sends an alternating current to the line that passes through the filter φ in the subscriber set AK of the linear part of the ETF, 1 enters the amplifier U, then to the Viv rectifier as a constant signal current is fed to the input / identification circuit I, subscriber set. In the initial state of the linear part of the EATP, a pulse with a duration of 50 microseconds circulates along the outputs of the ONBA (caller number identifier).

No. 149129-2. The outputs of ONVA are connected to the inputs of 2 identification circuits I of the subscriber set L / S.

If the pulses from HOBA coincide with the signal from the subscriber, the corresponding subscriber set issues a blocking signal to control input 3 BHBA. As a result of the effect of this signal on the HVAC, the circulation of the pulse stops, and the information on the number of the caller appears at the information outputs of the ANS. At the moment of blocking VONVA, at the command output of the latter, a start signal of the PFZC (transponder transmitter of the first control circuit) appears. The latter reads information from the HBA outputs and transmits it to the station part of the MF EATP. In the station part of the EATP, information is received at PP1UC, and through -C / C (free kit finder) is output to a free KCJI (connecting line set). In this case, the CCL is occupied, and the caller's number is memorized by the CSL lock. After the caller's number is fixed in the CSL, the latter issues a trigger signal to PP1UC, which transmits the occupied LSB number to the linear part 4 of the EATP (in Fig. 4, the CSL number is not specified). In the linear part of the CSL, the connectors form a MEX (multiple electronic coordinate connector), to the control inputs of the contour lines of which information is transmitted from ONBA (with outgoing connection). When information is received from the FP1UC number of the CSL to the control inputs of the verticals, the electronic contact of the intersection point of the MEX switching the subscriber line 5 to the connecting link 6 occupied by this connection is turned on. MEXS, as a result of which unlock is initiated.

After connecting the subscriber line 5 to the connecting line 6, a supra-tone frequency appears at the input of the CSL, which is filtered out from the conversational pair of filters and, after straightening and amplifying, is fed as a DC signal to the receiving relay. As a result of the operation of this relay, the subscriber is given a buzzer response signal from the station. Upon receipt of this signal, the subscriber proceeds to dialing the number of the 1 subscriber to be called. The impulse contact of the dialer interrupts the over-tonal frequency in accordance with the dialed number. At the same time, the receiving relay to the CSL pulses and transmits the number of the called subscriber to the instruments of the reference PBX 8. A further connection establishment process (performed by the instruments of the reference PBX.

If the subscriber is the ALEP subscriber, the free PSL is occupied by the devices of the reference exchange. The number of the called subscriber is remembered by the lock KSL. The appearance of the called subscriber number in the CSL is a command to start the RSI (information readout distributor), which connects the information outputs to the PP2UC Inputs, the latter sends the called subscriber number, the trunk number and the incoming communication signal to the linear part of the ASTP.

The received information is given to the control inputs of the verticals and horizontal lines of the MEX, as a result of which the electronic contact of the intersection point is turned on and the subscriber line is connected to the connecting line to which the phonetic call is sent. When the subscriber answers, the above-tone frequency is received at the CSL, as a result of which the electronic contact of the intersection point is turned on and the subscriber line is connected to the trunk line to which a phonic call is sent to the CSL.

When the subscriber answers, the over-tone frequency is received at the CSF, then the call is discontinued, and the subscribers can start a conversation.

End on EATP one-sided. The signal of departure from the side of the EATP (long loss of over-tonal frequency) is recorded in the corresponding XLS. On this signal, the CSL provides information about the number of the subscriber line and the number of the connecting line in PP2UC for transmission to the linear part. Received in the linear part of the PP2UC, information about the number of the subscriber line is issued as a command to block the subscriber line to the input 9 of the H2 circuit into the corresponding subscriber set. However, if the subscriber EATP hangs off, then at the input 10 of the HZ circuit there is no signal, and the blocking circuit remains in its original position. The information about the connecting line number comes in the form of a bounce signal to the corresponding connector 11 or 12 and the station circuit returns to its original state.

In case the EATP subscriber does not hang up, at the input 10 of the circuit I there is a signal from the subscriber. Upon receipt of the blocking signal from PP2UC to the input 9 of the circuit, And switching of the keys / SL and CL2 of the blocking circuit occurs. The switching removes the signal from the input 13 of the MI identification circuit and thereby excludes the possibility of identifying a trouble-free subscriber as a caller. Switching CL2 turns on the electronic contact of the busy signal and in addition transfers control to the blocking circuit 14 to the subscriber, since the keys are kept in working condition through circuit I. When the subscriber puts down the handset, the blocking circuit comes back to its original state the busy signal is turned off.

If there is no free trunk (connecting line), the subscriber line number is transmitted from the station part of the ASTP, which acts as a blocking signal L / S.

The proposed method of switching a telephone device into a PBX through a substation can be used for installation of telephones in areas with low telephone density.

Subject invention

The method of switching the telephone into the PBX through the substation with fixing the state of the subscriber line and breaking into the PBX and blocking the uninterrupted line to the subscriber set to the substation, characterized in that, in order to reduce power consumption, to increase the reliability of transmission of control signals to the station (station call, dialing, answer and reject) under the reduced isolation of the line, in the telephone set a generator is produced which produces a current of the above-tone frequency, powered by station 2e, switched on when removed A microtelephone, through which all signals are transmitted to the station, as well as a microphone from a semi-aerial amplifier with a low power current.

- 3 149129

-LPHH--

fuz

:. Gorazoitali MZKS 3

0t PKII

With MB A

TTwws-v // ll / s / mg

Rig 2

.

Owj

Rig. 2

6 I

Vus.

vgi