I've no experience with the A200, so I can't really pass judgement on it. We have 2 sites with TDM400P cards currently deployed (one with 3 FXO, the other with 1 FXO and 3 FXS). The site in Northampton with 3 FXO has been an absolute nightmare over the last 9 months the system's been in place. Initially we had big problems with echo that no amount of tweaking of the echo parameters would fix.
Once asterisk 1.2 was deployed, things improved remarkably. I took the time on-site to properly configure the txgain and rxgain using a milliwatt tone coming from one of our other servers in a datacentre (rather than relying on using ztmonitor -v whilst the client was making/receiving calls - you can't guarantee whether the party they're talking to has *their* gains properly configured, which means you end up with completely different results on every call). Once I'd got the gains properly configured, fairly standard echo cancellation settings of "on" and "echotraining=800" seem to work relatively well. One thing worth checking with BT - if you can find someone who can give you an accurate answer - is whether the Featureline will give you disconnect supervision. If it will, so much the better, as * 1.2 seems to have usable support for it. If it works reliably, you can increase the number of busy tones to detect before a channel is killed (this will massively reduce incidences of false hangups). It's still not as good as the building next door where they have 2 ISDN BRIs, but it works, and I've not had any complaints for the last month since their box was upgraded to 1.2. Hope that helps. (shameless plug - I have a spare TDM400 card here if you're looking to acquire one at a reduced price - discuss off-list if interested) Regards, Chris -- C.M. Bagnall, Director, Minotaur I.T. Limited This email is made from 100% recycled electrons _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users