SU1179553A1 - Subscriber's line equipment - Google Patents

Description

The invention relates to automatic telecommunications and can be used on the coordinates of the PBX to connect subscriber lines to switching systems. five

The purpose of the invention is to reduce the number of repeated calls.

The drawing shows the electrical structural diagram of the subscriber set. ten

The subscriber set contains the first winding of the 1 linear relay, the second winding of the 2 linear relay, the opening contact group 3 the linear relay, the contact group 15 for switching 4 the linear relay, separation relay 5, the contact group for opening 6 separation relay 5, the first contact group for switching 7 breaker 20 relay 5, second contact group for switching 8 breaker relay 5, signal generator "Busy" 9, call signal generator 10, call relay 11, contact group for closing 25 call 12 relay 11, contact Rupp opening 13 to the call relay 11, the contact group 14 for switching the call relay 11, the resistor 15 zo

Subscriber kit works as follows.

When conducting a conversation in the subscriber set, the first and second windings of the linear relay 1 and 2, separation relay 5 work, receiving the second wire plus the power source from the cord set. In this case, the call relay 11 does not work, since the resistor 15 is variable _<0 and with its help the current of the call relay 11 is set to such a current that the ampere turns are not sufficient to operate. When a call arrives at a subscriber occupied by a conversation, the marker, trying its state, delivers briefly to the second wire plus a power source, which increases the amount of current in the first and second linear relay 1 and 2 in the winding of the separation relay 5 and call relay 11.

This increase in current will not affect the operation of the first and second windings of the linear relay 1 and 2 and the winding of the separation relay 5, but triggers the call relay 11. The latter, having triggered, closes its contact group contacts for the closure 12 after the call, ensuring that it was previously installed connection, switches the contacts of the contact group to switch 14 call relay 11, disconnecting the first wire from the station switching equipment and connecting it to the call signal generator 10. This will ensure that signal used to say to the subscriber on receipt of another call thereto. After the contact of the contact group closes 12 call relay 11 and the contact group contacts switch to switch 14 of the call relay 11, the contact group opens to open the 13 call relay 11, which leads to a slow release of the call relay 11.

The latter, releasing, stops sending the signal of another call to the talking subscriber by switching contacts of the contact group to switch 14 of the call relay 11 to the initial state and provides a normal conversational state of the previously established connection to continue the conversation interrupted for several microseconds. call is determined by the time of deceleration of the relay call 11 to release and it can be selected. After releasing the relay, call 11 returns to its initial state its contact groups, which ensures that the subscriber set is ready to receive a short-term plus from the marker, which triggers call relay 11, which ensures the next sprinkling of the signal of another call to the talking subscriber. Other elements of the subscriber set are used for outgoing and incoming communications.

1179553

Claims (1)

SUBSCRIBER KIT, containing a linear relay with the first and second windings and contact groups for opening and switching, as well as an isolation relay with a contact group for opening, the first and second contact groups for switching, the first output of the first winding of the linear relay connected to the positive of the power source, the first output of the winding of the separation relay is connected to the contact group on the opening of the separation relay, the second output of the first winding of the linear relay through the opening contacts of the first contact group n and the switching of the isolation relay is connected to the first wire, the first output of the second winding of the linear relay is connected to the second wire, and the second output of the second winding of the linear relay is connected to the closing contact of the contact group to switch the linear relay and contact group to open the isolating relay, which is connected to the switching contact of the second contact group to the switching contact of the isolating relay, which is connected to the third wire and the power supply minus, the contacts of the first contact group the switching of the isolation relay is connected through the contacts of the contact group to the opening of the linear relay with the output of the signal generator "Busy", which distinguishes In order to reduce the number of repeated calls, a call signal generator was introduced, a call relay with contact groups for short, open and switch, and a resistor, one output of which is connected to the second wire, and the other to the first output of the call relay, the second output of which through the contacts of the contact group, the opening of the call relay is connected to the second output winding of the separation relay and the power supply minus, and the disconnecting contact of the contact group is switched • the call relay is connected to the first wire and the contact m contact group on the circuit of the call relay, which is connected between the third and second wires, the first output of the call signal generator is connected to the third wire, and the second output of the call signal generator is connected with the contact group to switch the call relay. 5 ϋ „,, 1179553 > ί 1179553 2