METHODS, TELECOMMUNICATION SWITCHES AND COMPUTER PROGRAMS FOR PROCESSING CALL SETUP SIGNALLING

摘要

A method of processing call setup signalling at a telecommunications switch. The telecommunications switch receives call setup signalling, comprising at least a caller ID. The telecommunications switch is connected via a plurality of trunks which connect the telecommunications switch to two or more other telecommunications switches capable of transmitting call setup signalling to the telecommunications switch. The telecommunications switch detects at least one of the plurality of trunks via which the call setup signalling has arrived at said telecommunications switch. The telecommunications switch determines a call handling option to be applied to the incoming call setup signalling based at least in part on the detecting and the caller ID.