> On my SBC phone, I used to hear a high-pitched chirp before the Call > Waiting beep (much like the first chrip of a V.90 modem negotiation tone) > when someone called in and I was on the line. Does this mean SBC was using > FSK to transmit caller ID on my line?
Yup. That's CallerID over Call Waiting via FSK _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
