On Fri, 2008-04-11 at 01:18 -0700, mark morreny wrote: > The T1 is 32 x 64Kbps channels ; Codec is GSM.
That's incorrect... a T1 is 24 channels, and each channel is 64kbps. There are also a few extra bits for framing, which adds up to 1.544 megabits per second in each direction. The audio comes across a T1 as G.711 (not GSM as stated above), and on a T1 it's usually using ulaw companding. An E1 is 32 channels, and each channel is the same 64kbps. This adds up to 2.048 megabits per second. Again, the audio is in G.711 format, but alaw companding is typically used on an E1. -- Jared Smith Community Relations Manager Digium, Inc. _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
