Digital telecommunications system

Details Digital telecommunications system Digital telecommunications system

H - Electricity

04

M

H04M 3/42 (2006.01) H04M 3/424 (2006.01) H04M 3/48 (2006.01) H04Q 3/72 (2006.01)

Patent

CA 2052858

Abstract A digital telecommunications system with a central ex- change (10) and a plurality of subscriber stations (20a-20d) is disclosed in which the calling subscriber station (20a) sends to the exchange (10) a calling signal con- taining the code of the called subscriber station (20b), and in which the exchange (10) records the code of the calling first subscriber station (20a). According to the invention, the exchange (10) includes a callback memory having a plurality of locations (11a-11d) each associated with one of the subscriber stations (20a-20d) and capable of storing the code of this subscriber station, and the called, second subscriber station (20b) has a callback function button (21) whose operation after release of the connection between the first (20a) and the second subscriber station (20b) generates a callback signal which causes the code of the calling first subscriber station (20a) to be read from the call- back-memory location (11b) associated with the second subscriber station (20b). This code is used as a desti- nation code for calling back the first subscriber station (20a). Figure 1

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