> Nothing like being on the cutting edge. :-) Always
> What sort of change was required to make this work? Some changes to chan_zap in how call features are handled. The zaptel changes were already there for a while. > In theory, the modems send the "don't echo cancel" tone to turn > off echo cancellation in the connection, but I think you are > suggesting that echo cancellation be manually hard coded off for > that extension, right? In that case, is the incoming T1 digital > stream identical to that handed to the outgoing T1? Should just > be a copy inside *, right? Inside the kernel, actually. We do look for the echo cancel disable tone, but to be pedantic might be a good idea, and echo cancellatoin just costs CPU anyway. > If that is true, then the bits are not mangled by * at all, > answering the previous question. But ISDN is actually *easier* > in some ways, no DSP on the samples to recover the modulation. The trouble with ISDN is specifically that there is no "echo cancel disable" tone preceeding the call. Mark _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
