Greetings list, We have an issue with call quality at 2 sites where the users (4 Elmeg IP290s at one site, 2 SPA942s at the other) do not have an asterisk box on-site. Each site has an 8mb down/448k up ADSL connection and the phones connect via SIP to an asterisk box in a datacentre using g729.
The asterisk box in the datacentre connects to our other asterisk boxes providing pstn connectivity via IAX2. Latency between these boxes is between 1 and 2ms. The ADSL connections to the client sites are all consistently delivering latencies of sub-25ms to the datacentre and there is traffic shaping on that connection to give priority to any traffic from the phones' IPs. Comments from the users at these sites are as follows: "call sounded like a dalek and I couldn't make out anything the caller was saying" "the phone on my desk is breaking up so badly it's virtually unusable" "calls sound like they're breaking up with metallic background noises" We have quite a few customers with asterisk boxes on-site (with phones connected to them via the LAN) using ADSL connections from the same supplier, and are not having these issues with them. canreinvite=no and nat=yes are set on all these devices, since they are behind NAT. Each device re-registers with asterisk every 5 minutes to prevent any possible NAT state timeouts. Any pointers/places to look for potential problems would be much appreciated. 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
