It's a matter of where signaling is used, as I understand it. If signaling/control for the routing of a "call" happens through the B channels, then it's "in-band" b/c part of the bandwidth of the bearer channels is taken up by signaling/call control. D channel is considered out-of-band b/c it's not a bearer channel. The voice call/data transfer is not going over this channel. It's just there to handle signaling for the B channels, therefore leaving all the B-channel bandwidth available. SS7 is an "out-of-band" protocol/network that handles all signaling b/w Telcos to connect and route calls end to end. No voice channels actually go over the SS7 network. It just handles all the overhead in the management of a call. Hope this makes sense.
""Kris Keen"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Can someone clarify the terms above? > > D Channel uses Out of Band Signaling, the B Channel uses In Band signaling? Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=46585&t=46530 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
