A CDE Definition
(SIGnaling TRANsport) An IP telephony protocol from the IETF that is used to transfer SS7 signals over IP networks. The telco switch sends SS7 signals to a signaling gateway (SG) that converts them into SIGTRAN packets, which travel over IP to the next signaling gateway or to a softswitch if the destination is not another PSTN. SIGTRAN uses the Stream Control Transmission Protocol (SCTP) for reliable transport. See IP telephony and SCTP.
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