CAS : Chanel Associated Signaling
In band signaling used in VoIP/PSTN. Also known as PTS (Per-Trunk Signaling). The most common implementation is RBS (Robbed Bit Signaling). The variants are Loopstart, Groundstart and E&M signaling.
More details at: http://www.cisco.com/en/US/tech/tk652/tk653/technologies_tech_note09186a00800e2560.shtml
CCS: Common Channel Signaling
This is the practice of using the common dedicated signaling channel for all the data channels. ISDN & SS7 are the two common implementations.
More details at: http://en.wikipedia.org/wiki/Common_Channel_Signaling
No comments:
Post a Comment