> Message: 2 > Date: Mon, 15 Dec 2003 23:13:46 +0100 > From: Florian Overkamp <[EMAIL PROTECTED]> > To: [EMAIL PROTECTED] > Subject: [Asterisk-Users] Slightly OT and mildly insane: Modems through VoIP :-)) > Reply-To: [EMAIL PROTECTED] > > Hi, > > First off, let me state that _YES, I am fully aware that what I am doing is > insane, prone to major havoc and bad for general health_ :-)) > > Scenario: My GF needs an analog modem to use with her banking software > (sodding backs don't supply a decent web-application for company use). I am > experimenting to see if we can get it to work (albeit slow) trough our ATA186 > talking g711 to Asterisk with chan_capi to the outside world. Should we fail, > there are more sane alternatives, but humour me :-)) > > Now, with some modems on the other end I have received nice 26400bps > handshakes, but it takes a long time and the successrate is about 25% :-) My > feeling is this should be better if we choose to slow it down more. > > But who can tell me what the best modem settings would be to try ? My HAYES > dialect is rather old :-)) > > Any experiences or hints are appreciated. > > -- > Best regards, > Florian Overkamp > I've made data calls over g.711 voip from australia to the uk and they trained up to 31k2 fine. What will throw them is packet loss. Just one lost 20ms frame was normally enough to force a retrain. Lose a packet during retraining and the call would probably drop. Might pay to check the duplex settings on your ata and whatever its connected to. echo cancellers could possibly interfere with things but they should be disabled by the 2100hz tone at the front of the call.
cheers, darren _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
