Method of controlling call of analog subscriber using telephone user part in distributed control switching system

摘要

The present invention relates to a call control method for controlling a call of an analog subscriber using a telephone user unit, which is a common line signaling method (No. 7), as a signaling method between stations in a distributed control switching system. Line Signaling (no. 7) The matching of the blocks for telephone user units is performed by the analog subscribers accommodated in the distributed control switching system through the common line signaling (No. 7) telephone user unit (TUP). In order to provide a call control method for enabling a call with a subscriber, a first step (41, 42) of determining a relay call type upon receiving a TUP relay call processing request; A second step (43, 44, 47, 49) of generating and performing an outgoing call processing process if the relay call type is outgoing call and then recovering it; And if the relay call type is an attestation code, a telephone call between analog subscribers is possible through a TUP, including a third step (45 to 48) of generating and performing an incoming call processing process and then performing a recovery process. This has the effect of minimizing the impact on the TUP and enabling independent implementation of the TUP's functions.