Cas ,ccs

hi all
this to protocols are to carry voice traffic between PSTN switches , or generate signals for on-hook off-hook , ringing , and others like dial-tone ??

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snickered

CCS = Common Channel Signaling
CAS = Channel Associated Signaling

They are forms of signaling. The b-channels in each implementation are responsible for carrying the voice.

xzyan

PRI=CCS
T1/E1=CAS=RBS

Hope this helps

EdTheLad

xzyan wrote: »

PRI=CCS
T1/E1=CAS=RBS

Hope this helps

Not exactly correct,PRI is a term associated with ISDN, ISDN uses CCS signalling.
CAS and CCS are two types of signalling that can be used within a T1/E1.

CAS signalling uses RBS (robbed bit signalling), at specific frame intervals it robs bits from the
data/voice channel and uses them for signalling.

CCS reserves a 64bit channel for signalling, timeslot 16. There are different types of CCS i.e. ISDN, QSIG etc, CCS is much preffered over CAS, CAS is being phased out.

xzyan

Thanks, I learned something