Hello, What is the difference between CAS and CCS signalling for E1. Control signals are both carried in 16th timeslot, so what's the main difference ?
- posted
15 years ago
About CAS and CCS [Telecom]
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- posted
15 years ago
CAS does not carry signalling info on the 16th timeslot (for E1). It carries information in the robbed bits out of each voice channel.
A PRI E1 is using CCS. (although SS7 signalling in the 16th timeslot is also an option for CCS).
OOTH, CAS retains all channels of the span for voice, and much simpler signalling is carried in-band of each channel.
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- posted
15 years ago
I have never seen robbed bit signaling in E1. Can you give examples of where this is used ?
/ Lars Poulsen