Voice of person we called cuts out & back in intermitten

Posts: 20

We've noticed recently that the voice of certain people we have called will intermittently cut out and then come back on after a few to several seconds. They can still hear our voice, but we cannot hear them. The call doesn't always terminate, or drop. It doesn't happend with all phone calls, either; but perhaps the time of day has something to do with it? We were having trouble Saturday night around 7:00pm.

We're using the VTech 8100 IP router/phone and Comcast High Speed Internet coming through a Motorola SB5100 Surfboard cable modem.

Posts: 4751 · Vonage Forum **MVM** Joined: Aug 30, 2005 Posts: 4751

Please post the rest of the technical details listed in the sticky message at the top of the forum.

Posts: 20 · Posted: Sun Aug 27, 2006 3:03 pm Post subject:

1. Saint Paul, MN (55118)
2. Comcast High Speed Internet
3. Upload: 384Kbps Download: 6Mbps
4. Motorola SB5100 Surfboard cable modem
5. VTech 8100 IP
6. Modem---->Vonage Adapter-->PC
7. Choppy audio -- the person I am talking to cuts in and out, so I cannot hear them at times, though they can still hear me the entire time. Happens often when I call voice mail, too. Occasional dropped calls as well.
8. We don't have Java installed for the VoIP test.

Posts: 4751 · Vonage Forum **MVM** Joined: Aug 30, 2005 Posts: 4751

OK, you can run an alternate test at www.testyour voip.com . Run a test call to Boston and post the detailed results.

Posts: 20 · Posted: Sun Aug 27, 2006 10:12 pm Post subject:

That site also requires Java.

Posts: 4751 · Vonage Forum **MVM** Joined: Aug 30, 2005 Posts: 4751

Sorry, I should have realized that.

Do you have a cooperative friend with a broadband connection? If so, it would be informative if you can take your Vonage gear and see how it performs on another system.

Posts: 20 · Posted: Mon Aug 28, 2006 10:36 am Post subject: VoIP Speed Test results

Speed test statistics
---------------------
Download speed: 3295880 bps
Upload speed: 737856 bps
Quality of service: 34 %
Download test type: socket
Upload test type: socket
Maximum download pause: 86 ms
Average download pause: 8 ms
Minimum round trip time to server: 40 ms
Average round trip time to server: 41 ms

VoIP test statistics
--------------------
Jitter: you --> server: 6.3 ms
Jitter: server --> you: 7.9 ms
Packet loss: you --> server: 0.0 %
Packet loss: server --> you: 0.0 %
Packet discards: 0.0 %
Packets out of order: 0.0 %
Number of supported VoIP lines: 12
Estimated MOS score: 3.9

Posts: 4751 · Vonage Forum **MVM** Joined: Aug 30, 2005 Posts: 4751

Well, after all that I'm afraid I don't have much to suggest. The test results look very good, though I'm puzzled as to why the QoS is so low when the other numbers all look good.

I gather you installed Java (?). If so, you might want to run a comparison test at the other site.

Posts: 20 · Posted: Mon Aug 28, 2006 10:08 pm Post subject:

Just ran the test again on a Monday night. Everything seems good but the Quality of Service.

Speed test statistics
---------------------
Download speed: 9358840 bps
Upload speed: 738288 bps
Quality of service: 47 %
Download test type: socket
Upload test type: socket
Maximum download pause: 50 ms
Average download pause: 2 ms
Minimum round trip time to server: 39 ms
Average round trip time to server: 40 ms

VoIP test statistics
--------------------
Jitter: you --> server: 6.7 ms
Jitter: server --> you: 8.1 ms
Packet loss: you --> server: 0.0 %
Packet loss: server --> you: 0.0 %
Packet discards: 0.0 %
Packets out of order: 0.0 %
Number of supported VoIP lines: 12
Estimated MOS score: 3.9

Posts: 20 · Posted: Tue Aug 29, 2006 10:24 am Post subject: TestYourVoIP.com Results

MOS Analysis From You TO Boston

Media Quality MOS 3.7 / 5.0
(Best with G.711 is 4.4)

Degradation Sources
Codec 0.58 43.0%
Latency 0.00 0.0%
Packet Discards 0.76 57.0%
Packet Loss 0.00 0.0%

Codec G.711 (PCM at 64kbps,
20ms RTP payload,
80kbps IP BW)
Round-Trip
Latency 127 ms
Packet Discards 2.9%
Packet Loss 0.0%
Loss Periods Min: 20 ms
Avg: 20 ms
Max: 60 ms
Random Loss

Jitter Min: 0 ms
Avg: 3 ms
Max: 54 ms

Signaling Quality Post-Dial Delay 70 ms
Call Setup Time 100 ms
Media Delay 270 ms
MOS Analysis FROM Boston To You

Media Quality MOS 4.2 / 5.0
(Best with G.711 is 4.4)

Degradation Sources
Codec 0.58 73.9%
Latency 0.00 0.0%
Packet Discards 0.20 26.1%
Packet Loss 0.00 0.0%

Codec G.711 (PCM at 64kbps,
20ms RTP payload,
80kbps IP BW)
Round-Trip
Latency 127 ms
Packet Discards 0.9%
Packet Loss 0.0%
Loss Periods Min: 20 ms
Avg: 20 ms
Max: 40 ms
Random Loss

Jitter Min: 0 ms
Avg: 3 ms
Max: 20 ms

Signaling Quality Post-Pickup Delay 170 ms
Call Setup Time 148 ms
Media Delay 204 ms