TISPAN; PSTN/ISDN simulation services: Explicit Communication Transfer (ECT); Protocol specification
The present document specifies the stage three (protocol description) of the Explicit Communication Transfer (ECT) simulation service, based on stage one and two of the ISDN ECT supplementary service. Within the Next Generation Network (NGN) the stage 3 description is specified using the IP Multimedia Call Control Protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP).