VOIP Issues

Posts: 1 · New Forum Member Joined: Apr 06, 2006 Posts: 1

Hello,

We have had Vonage for several months now using the Linksys phone adapter and a comcast internet modem.

The funny part is calls are fine if they call us but if we call them often the sound disappears.

I just started using Vonage softphone over the last two days and the quality is okay and then disappers for 5 seconds every few minute and comes back and works for a minute or two.

I used testyour Voip to place a call to boston and saw similar results. The call from us was bad but the call back is perfect:

MOS 3.5 / 5.0
(Best with G.711 is 4.4)

Degradation Sources
Codec 0.58 37.6%
Latency 0.00 0.0%
Packet Discards 0.83 54.2%
Packet Loss 0.12 8.1%

Codec G.711 (PCM at 64kbps,
20ms RTP payload,
80kbps IP BW)
Round-Trip
Latency 144 ms
Packet Discards 2.7%
Packet Loss 0.4%
Loss Periods Min: 20 ms
Avg: 20 ms
Max: 100 ms
Burst Loss

Jitter Min: 0 ms
Avg: 11 ms
Max: 118 ms

Signaling Quality Post-Dial Delay 120 ms
Call Setup Time 140 ms
Media Delay 270 ms
MOS Analysis FROM Boston To You

Media Quality MOS 4.4 / 5.0
(Best with G.711 is 4.4)

Degradation Sources
Codec 0.57 89.7%
Latency 0.00 0.0%
Packet Discards 0.07 10.3%
Packet Loss 0.00 0.0%

Codec G.711 (PCM at 64kbps,
20ms RTP payload,
80kbps IP BW)
Round-Trip
Latency 144 ms
Packet Discards 0.4%
Packet Loss 0.0%
Loss Periods Min: 20 ms
Avg: 20 ms
Max: 20 ms
Random Loss

Jitter Min: 0 ms
Avg: 1 ms
Max: 20 ms

Signaling Quality Post-Pickup Delay 124 ms
Call Setup Time 135 ms
Media Delay 161 ms

Posts: 4777 · Vonage Forum **MVM** Joined: Aug 30, 2005 Posts: 4777

I think you've fingered the problem yourself. You have poor Voip results on the uplink. I'd try plugging a computer directly into the modem and running that test again. If the results don't improve, then you'll probably have to talk to your ISP about uplink quality. What speed are you measuring on the uplink? Is it what your ISP says you should get?