> I've read and experienced the echo problems with the X100P. Is Digium > going to fix the problem or refund our money? I want to see this work > because myself and other small companies out there use analog lines. I > would trade up to T1 but that requires me to have at least 9 lines. If > I did trade up, do the T1 cards work perfectly with no echo at all? I > get echo with my directly connected computer using Xten SIP. No matter > with all the suggestions to change the parameters, it still has echo.
Can you explain what you have tried? If it's _you_ who is getting the echo (not the party calling you) and you just can't kill it, the culprit often enough seems to be your PSTN interface; near-end echo is largely caused by impedance mismatches in the hybrid circuit (the circuit which converts the 4-line interface to the 2-line one) -- the software echo cancellers just try and get rid of the echo in software but the problem is often a hardware issue. Just to reiterate the possible solutions that I am aware of: - try different echo cancel algorithms (mark2 with agressive mode is what I use) - reduce or increase the number of taps (echocancel=yes is equivalent to echocancel=128) -- the fewer taps the better, but more taps may be necessary to eliminate echo. - try reversing the ring and tip on the FXO interface - try attaching the FXO card right at the demarcation point and remove ANY other equipment connected at the point of demarcation. Stubs can play havoc with echo cancellation > Does anyone have the T1 and have no problems at all? I would surely > appreciate you experiences. What's my option to get this too work > flawlessly? I am currently experimenting with the T1 card and a channel bank to see if "telco-grade" equipment will do a better job of removing echo. I'm waiting on a cable before I can start testing though. :-( I have a Carrier Access Channel Bank I with 12 FXO ports on it, and an Adit 600 with 12 FXS ports coming soon. the CBI is pretty old and I've heard that it cannot do far-end disconnect detection but the FXO cards claim that they dynamically adjust to compensate for impedance changes to minimize echo, so I'm keen on seeing what they can do. I just got pricing from our telco (Bell Canada) and to purchase an entire ISDN PRI (23B+D) with 30DID and 911 service, the per-line cost is almost identical to regular analogue PSTN ports. There'd be no echo on those babies, I imagine, since there's no hybrid circuit until you hit the other end of the call. Regards, Andrew _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users