SU70777A1 - Telephone set - Google Patents

Description

The subject of the invention iiacTovniero is the automatic apparatus of automatic telephone exchanges. Aiparat makes it possible to receive call sishals from staiiia with currents of tone frequency, for which it is normally connected to the line through a capacitor. When the microfi phone is picked up, the telephone is turned on at a local rate, the inductor is 1o associated with the microphone. D; 1I call station without removing the tube; the device is equipped with a button that closes the calling circuit.

The telephone circuit (see drawing) provides for receiving control and call signals directly to the telephone. The signals from the station are supplied by the tonal frequency currents and. I act on the phone, provide the norm; | nal audibility.

T telephone; A receiver with a receiver .1 (in a tone frequency, is connected to the line in series with a capacitor / / and a transformer winding TP.

D.1I connecting to the station, the subscriber briefly presses the W / v button in his / her device or rotates the O; UIH step to the disk number dialer NN. The connection of the staging devices is signaled from the station by a tone frequency signal in the tele1 {t of the apparatus. When a signal is received from the station, a number is dialed, in accordance with which the station devices are installed on a treyuyem (IF; 1 lines.

At the end of dialing, a Center receives a call termination signal from the station if the called subscriber’s line is free, or a busy signal, send a handset to the called subscriber.

When receiving a termination signal from the station, the caller must pick up the micro-phone {) handset from the PD switchboard of the device, since, when off-hook, a call is sent to the called subscriber. When the caller picks up the handset of his device, the call is terminated and the spoken position of the station is set. To the atom s, the microphone with one contact on,; to. Uchsn Through the contacts of nimeron H) Ir, 1 ht to Hpoui.U a, and the second through the winding of trins1 {TR TR,

contact b of the switch of the RP switch (contact in this case) is opened), to the wire l. The body {t) is included in the local circuit, inductively connected to the micnp {}. The local circuit consists of a contact and a lever switch P / 7, a transformer TP winding, a telephone, and a second contact switch and a lever switch.

This is done when the subscriber hangs up the handset. In this case, the subscriber can reconnect to the station without waiting for the other subscriber to hang up the handset. The caller can hang up at any stage of the connection by briefly pressing the CC button. or by turning the HH dial one step.

Subject invention

Claims (2)

1.Tele ({uniNi | apiarat for automatic telephone stations.1), tel and hp and with the fact that with the possibility of receiving a call signal from the current frequency signal to the telephone, the next one is normally connected to the line through a capacitor and when the MUKpfiTe.tephone is disconnected from the contactom lever lever; | (; (()) mon is inserted into the local circuit induced by microphmg. 2. A telephone set according to claim. 1, characterized in that. that in order to be able to make a call to the station without removing the earphone, a button is provided, by pressing which the calling circuit is closed. V