www.itexpo.com October 10-13, 2006 San Diego Convention Center, San Diego California T1 Primarily Used In US T1 – PSTN Digital Interface –CAS – Channel Associated Signaling (Wink, Immediate, etc) 24 Voice Channels MF/DTMF In-band Signaling –PRI – Primary Rate Interface (D Channel) 23 Voice Channels 1 Data Channel Q.931 Messages
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