We have been having consistent problems with our Vonage phone. The occasional call will go well, but in almost all cases (at different times of day, to different destination numbers, etc.) we can hear the other person perfectly, but our audio is so choppy and cut-off to the person on the other end that they can't make out what we're saying. I'd think choppy audio would be a simple connection problem, but the speed test is fine and the problems are only one-way (we can always hear them perfectly).
Following the advice of the sticky, the following is our situation: 1. Your location Nicaragua 2. Your ISP name and type (cable, DSL, wireless etc) Cable from the primary provider here 3. Upload and download speeds See speed test results below 4. Modem make and model Scientific Atlantis (a Cisco company) 2100 5. Type of Vonage adapter used ie RT31P2 or PAP2 Model # IP 8100-2 6. Setup of Network ie Modem---->Vonage Adapter-->PC As far as I can tell, Modem --> Switch --> Vonage Adapter, Switch --> PC 7. Issue you are experiencing ie dropped calls, choppy audio etc Described above 8. Run this Voip Test: After the test has fully completed, in the Advanced Tab, click on "View Text" in the lower right hand corner. Copy-N-Paste that data into your post.
Speed test statistics --------------------- Download speed: 737304 bps Upload speed: 491240 bps Quality of service: 99 % Download test type: socket Upload test type: socket Maximum download pause: 35 ms Average download pause: 16 ms Minimum round trip time to server: 99 ms Average round trip time to server: 102 ms
Voip test statistics -------------------- Jitter: you --> server: 4.0 ms Jitter: server --> you: 25.0 ms Packet loss: you --> server: 0.0 % Packet loss: server --> you: 0.1 % Packet discards: 0.0 % Packets out of order: 0.0 % Number of supported Voip lines: 8 Estimated MOS score: 3.6
For some reason, Boston (and Montreal) didn't work (error about blocked ports) for a while. I ran the test repeatedly for different destinations, though, with the following results:
Total Test Runs 15 Median MOS to All Test Points 3.3 Median MOS from All Test Points 3.2 Target Codec MOS To MOS From Boston G.711 3.8 3.1 Helsinki G.711 2.9 2.9 Helsinki G.711 3.0 2.9 Sydney G.711 3.1 3.1 Sydney G.711 1.9 2.5 Sydney G.711 3.4 2.9 Sydney G.711 3.2 3.1 San Jose G.711 3.1 3.5 San Jose G.711 3.3 3.4 San Jose G.711 3.4 3.3 San Jose G.711 3.2 3.4 London G.711 3.0 3.7 London G.711 3.5 3.9 London G.711 3.7 3.3 London G.711 3.8 3.5
Just to compare, I ran the speed test again and got Quality of Service results of 71%, 53%, 70%, 58%, 45%. All other sections were good (green).
It looks like I'm not getting a good connection now, so I'll try again later and post more results. I'm still curious, though, what could cause incoming audio to be perfect and outgoing audio to be horrible. All the connection problems I can think of would affect transmission both ways, I'd think.
tglea Vonage Forum Evangelist
Joined: Nov 22, 2006 Posts: 433
Location: Nebraska
Maybe steve overlooked the jitter at 25ms. That is not good at all and would cause the problems you are describing. For comparison, run the test again with all your routers and switches out of the line. Hook your computer directly to the modem and see if the jitter improves.
Well, here's another run with everything as before (not unplugging/changing the network):
TestYourVoIP MOS to San Jose: 3.7 TestYourVoIP MOS from San Jose: 4.0
and
Speed test statistics --------------------- Download speed: 722728 bps Upload speed: 465184 bps Quality of service: 98 % Download test type: socket Upload test type: socket Maximum download pause: 34 ms Average download pause: 16 ms Minimum round trip time to server: 92 ms Average round trip time to server: 101 ms
Voip test statistics -------------------- Jitter: you --> server: 5.0 ms Jitter: server --> you: 5.4 ms Packet loss: you --> server: 0.4 % Packet loss: server --> you: 0.0 % Packet discards: 0.0 % Packets out of order: 0.0 % Number of supported Voip lines: 7 Estimated MOS score: 3.8
Ok, direct connection to modem. I'm getting some really bad results this time. I ran both tests a few times in a row:
TestYourVoIP #1: MOS to San Jose: 3.5 MOS from San Jose: 1.7 Packet Loss to San Jose: 0.3% Packet Loss from San Jose: 8.3%
TestYourVoIP #2: MOS to San Jose: 2.8 MOS from San Jose: 1.2 Packet Loss to San Jose: 1.3% Packet Loss from San Jose: 10.5%
TestYourVoIP #3: MOS to San Jose: 3.2 MOS from San Jose: 1.4 Packet Loss to San Jose: 0.7% Packet Loss from San Jose: 9.6%
Speed test statistics #1 --------------------- Download speed: 165848 bps Upload speed: 493464 bps Quality of service: 34 % Download test type: socket Upload test type: socket Maximum download pause: 544 ms Average download pause: 108 ms Minimum round trip time to server: 251 ms Average round trip time to server: 252 ms
Voip test statistics -------------------- Jitter: you --> server: 4.2 ms Jitter: server --> you: 0.0 ms Packet loss: you --> server: 0.6 % Packet loss: server --> you: 100.0 % Packet discards: 0.0 % Packets out of order: 0.0 % Number of supported Voip lines: 2 Estimated MOS score: 3.5
Speed test statistics #2 --------------------- Download speed: 106744 bps Upload speed: 463224 bps Quality of service: 38 % Download test type: socket Upload test type: socket Maximum download pause: 896 ms Average download pause: 255 ms Minimum round trip time to server: 251 ms Average round trip time to server: 252 ms
Voip test statistics -------------------- Jitter: you --> server: 2.8 ms Jitter: server --> you: 4.0 ms Packet loss: you --> server: 0.5 % Packet loss: server --> you: 9.7 % Packet discards: 0.0 % Packets out of order: 0.0 % Number of supported Voip lines: 1 Estimated MOS score: 3.5
Speed test statistics #3 --------------------- Download speed: 228784 bps Upload speed: 353544 bps Quality of service: 30 % Download test type: socket Upload test type: socket Maximum download pause: 717 ms Average download pause: 78 ms Minimum round trip time to server: 249 ms Average round trip time to server: 1213 ms
Voip test statistics -------------------- Jitter: you --> server: 4.0 ms Jitter: server --> you: 0.0 ms Packet loss: you --> server: 0.2 % Packet loss: server --> you: 100.0 % Packet discards: 0.0 % Packets out of order: 0.0 % Number of supported Voip lines: 3 Estimated MOS score: 3.5
tglea Vonage Forum Evangelist
Joined: Nov 22, 2006 Posts: 433
Location: Nebraska
Your last set of tests are horrible. How old is your modem? It is either your modem going bad or you have some line problems, most likely between the pole and your modem. Bad cable line or splitter or fitting somewhere in your house. Your test results explain why sometimes your calls go ok and others don't. Your results that you posted here have ranged from decent to horrible. That would explain the varying quality of your calls. This is a problem with your ISP and not Vonage. Again it is your modem or a fault in the line somewhere.
From a command prompt, type ping -t www.yahoo.com Press control C to stop it. Let it run for a few minutes and see what the results are. Any packet loss is not good and is a reason you can give to your ISP to fix something. Also, if the RTT is over 100ms, that is not very good even from where you are at.
Ping statistics for 87.248.113.14: Packets: Sent = 167, Received = 163, Lost = 4 (2% loss), Approximate round trip times in milli-seconds: Minimum = 228ms, Maximum = 451ms, Average = 328ms
[hr]
Speed test statistics --------------------- Download speed: 129344 bps Upload speed: 429216 bps Quality of service: 3 % Download test type: socket Upload test type: socket Maximum download pause: 3777 ms Average download pause: 124 ms Minimum round trip time to server: 94 ms Average round trip time to server: 101 ms
Voip test statistics -------------------- Jitter: you --> server: 4.8 ms Jitter: server --> you: 5.7 ms Packet loss: you --> server: 0.4 % Packet loss: server --> you: 37.7 % Packet discards: 0.0 % Packets out of order: 0.0 % Number of supported Voip lines: 2 Estimated MOS score: 3.3
[hr]
TestYourVoIP: MOS to San Jose: 3.5 MOS from San Jose: 1.0 Packet Loss to San Jose: 0.4% Packet Loss from San Jose: 26.0%
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