alaerte Vidali wrote: > > The URL following states: Alas, the URL didn't get posted. If it's CVOICE materials, be wary. They munged this topic.
> > "Channel-associated signaling, which uses E1 time slot 16 (the > D channel) for signaling, fits into the out-of-band signaling > category." Cisco and other documents consider the use of E1 time slot 16 to be out-of-band signaling because it's an entire channel used for signaling instead of using bits that are in-band with the data bits. It could be CAS or it could be CCS. Channel-Associated Signaling (CAS) means that the channel is structured in such a way that each data channel can use some bits for its signaling. Common Channel Signaling means that the signaling channel is unstructured and could be used by any data channel that currently needs it. That may be a gross over-simplification. Someone can correct me if I'm confused. It's weird that they threw ISDN into the statement (by saying the D channel in parentheses.) ISDN PRI uses CCS, doesn't it? I guess I'm not sure about that. I've seen that it does, but that might have been the CVOICE class, which really did munge this topic. > > "Robbed-bit signaling, which uses bits from specified frames in > the user data channel for signaling, fits into the in-band > signaling category." > > Robbed-bit is used in T1-CAS. That sounds right. The robbed-bit signaling used on T1s is considered both in-band and CAS, according to most documents... > > So I can say E1-CAS is classified in out-of-band signaling and > T1-CAS is classified in in-band signaling. > > Is that right? Sounds right to me. Priscilla > I have seen questions stating that CAS is just > one thing, in-band signaling. > > Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=66623&t=66607 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
