> Was wondering if anyone out there has had the experience I have been > having. In reading recent posts on echo cancellation, I think there > is.... > > We recently cut over the Asterisk and are configured with 5 FXS and 2 > FXO ports to the PSTN via 2 TDM400P's and 5 SIP phones on our local > network. I have set up echo cancellation with 800ms echo training. I do > not have echocancelwhenbridged on, since since this is for complete TDM > circuit per the comments in zapata.conf. When calls come in, there is > echo, but it quickly trains and goes away. This is not the problem > though. The asterisk server has 1GB RAM and 1GHz clock. We are currently > using u-law codecs only. Digium support said that I might want to play > around with using other codecs and the RX/TX gain to see if that makes a > difference. These gain settings are not set and therefore taking the > default. Before I start shooting in the dark, I thought I'd go to this > group to see if the following problem has been solved before I start > shooting in the dark. > > The problem we are having is that every now and then, say 4 times over > a 20 minute call, interference occurs in the ear of the SIP phone user. > The other side (PSTN caller) of the conversation may hear a few short > (half second) breaks in the conversation. The characteristics of the > interference in the SIP phone user is some in-band MF tones which may > start out faint and get louder which are broken up them selves to make a > cracking noise. There may be some momentary echo of my voice when this > happens also. This may last for about 3 seconds and then the > conversation is clear. > > We don't get this when using Analog phones on an FXS port nor for SIP > to SIP conversations. > > Has anyone else experienced this and resolved it?
Sounds sort of like a possible issue with the ethernet. Are you sure you're running full-duplex on * and the switch its attached to, etc? _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
