EMULATED IP-CALL & SERVICES SYSTEM METHOD & APPARATUS

摘要

An IP-subscriber connection is introduced in correspondence to an existing TDM connection between a subscriber A on an A­ side of the TDM connection and a subscriber B on a B-side of the TDM connection. A set up signal including IP connection information and a caller ID of the subscriber A is sent to the B-side over the existing TDM connection. The A-side is invited to set up an IP connection from the B-side including IP connection information and a caller ID of the subscriber B. Next, the IP-subscriber connection is established based on the IP connection information and caller ID from the subscriber A and the subscriber B. There is further provided TDM call services and features for this IP-subscriber connection. The IP-concentrator sets a trigger that causes a TDM switch on the A-side to pass control of an incoming call to the IP concentrator on the A-side. The TDM switch is instructed to resume call processing of the incoming call when the trigger is triggered.