> > Here is another test of the link the jitter has dropped down quite a > bit still not good enough for VoIP, but better. > > > Speed test statistics > --------------------- > Download speed: 3864 kbps > Upload speed: 894 kbps > Download consistency of service: 55 % > Upload consistency of service: -- % > Download test type: socket > Upload test type: POST > Maximum TCP delay: 933 ms > Average download pause: 7 ms > Minimum round trip time to server: 1 ms > Average round trip time to server: 1 ms > Estimated download bandwidth: 13010 kbps > Route concurrency: 3.3666103 > Download TCP forced idle: 0 % > Maximum route speed: 524280 kbps > > VoIP test statistics > -------------------- > Jitter: you --> server: 166.8 ms > Jitter: server --> you: 3.1 ms > Packet loss: you --> server: 0.0 % > Packet loss: server --> you: 0.0 % > Packet discards: 73.0 % > Packets out of order: 0.0 % > Estimated MOS score: 1.1 > > > General information > ------------------- > IP address: 72.168.141.72 > Local time: Dec 30, 2014 11:19:37 AM > Test server: http://voiptest.8x8.com:82/ > > Here it is with a 729 codec simulation: > > > Speed test statistics > --------------------- > Download speed: 3557 kbps > Upload speed: 896 kbps > Download consistency of service: 21 % > Upload consistency of service: -- % > Download test type: socket > Upload test type: POST > Maximum TCP delay: 1242 ms > Average download pause: 8 ms > Minimum round trip time to server: 1 ms > Average round trip time to server: 1 ms > Estimated download bandwidth: 4777 kbps > Route concurrency: 1.3429916 > Download TCP forced idle: 0 % > Maximum route speed: 524280 kbps > > VoIP test statistics > -------------------- > Jitter: you --> server: 106.9 ms > Jitter: server --> you: 2.9 ms > Packet loss: you --> server: 0.0 % > Packet loss: server --> you: 0.0 % > Packet discards: 65.8 % > Packets out of order: 0.0 % > Estimated MOS score: 1.4 > > > General information > ------------------- > > Note that the Jitter has dropped, not sure if that is going from 711 to 729 > but I will do more testing.
This is good information and a good start. Yes, the jitter did drop and I'd expect it to for g.729 since it requires less bandwidth. Even though at 90 Kbps, it's using approx. 10% of the available bandwidth. The bigger concern for me though is "packet discards = 65.8%" The VOIP server will discard packets it receives too late and that it can't use. This indicates the delay is too high between you and the VOIP server. It's too bad that only max and not avg tcp delay is provided. As it is, max tcp delay of 1242 ms is way out of tolerance for VOIP. You could provide this data to HughesNet and see what they can do. Maybe there is some way they can clean up the sat-link? I'd be curious to see test results from say midnight or after. If there's congestion on the Sat uplink side, that could delay the packets enough for the VOIP server to discard them. _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
