| Fretz, EA Eric @ IS 2005-10-24, 9:12 am |
| It depends on what you call "4-wire". In the traditional sense, when
someone says "2-Wire E&M" they are only talking about the audio path.
"4-wire E&M" uses 2-pair to transport duplex audio, Tip,Ring, tip1,ring1.
Type 1 E&M assumes you are using 2-wires for signaling.
Cheers,
Eric
-----Original Message-----
From: cisco-voip-bounces@puck.nether.net
[mailto:cisco-voip-bounces@puck.nether.net] On Behalf Of Bob A. Bowie
Sent: Friday, October 14, 2005 12:42 AM
To: cisco-voip@puck.nether.net
Subject: [cisco-voip] E&M Type I question
Can someone tell me on a T1 trunk, with E&M Type 1 with 4 wire, does
the signalling for all 24 ds0's happen on two of the wires and the audio is
on the
other two wires?
Thanks
|