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Post new topic   Reply to topic  Vonage® VoIP Forum - Vonage News, Reviews And Discussion » Vonage Forum Archive
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jritzi
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Joined: Jun 12, 2008
Posts: 6

PostPosted: Wed Jun 11, 2008 7:39 pm    Post subject: Audio received ok, sent poorly Reply with quote Back to top

Hello,

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
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Steve48
Vonage Forum MVM
Vonage Forum <b>MVM</b>


Joined: Aug 30, 2005
Posts: 4777

PostPosted: Wed Jun 11, 2008 9:21 pm    Post subject: Reply with quote Back to top

Your test results actually look quite good. What kind of results do you get at www.testyourvoip.com, test call to Boston?

_________________
Steve Gray
Orlando, FL
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jritzi
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Joined: Jun 12, 2008
Posts: 6

PostPosted: Thu Jun 12, 2008 5:08 pm    Post subject: Reply with quote Back to top

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.
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tglea
Vonage Forum Evangelist
Vonage Forum Evangelist


Joined: Nov 22, 2006
Posts: 433
Location: Nebraska

PostPosted: Thu Jun 12, 2008 6:33 pm    Post subject: Reply with quote Back to top

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.

_________________
Cox: 9Mbps/800kbps
Router: D-Link DI-624
Vonage: V-Portal
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Steve48
Vonage Forum MVM
Vonage Forum <b>MVM</b>


Joined: Aug 30, 2005
Posts: 4777

PostPosted: Thu Jun 12, 2008 7:54 pm    Post subject: Reply with quote Back to top

25 ms isn't stellar, but it's not horrible. You may be right, but I wouldn't expect that much trouble. "Quite good" was overstating though...

This does look like an intermittent ISP issue. Jritzi, when you post more results, give us the details as you did in your first post.

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Steve Gray
Orlando, FL
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jritzi
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Joined: Jun 12, 2008
Posts: 6

PostPosted: Thu Jun 12, 2008 8:09 pm    Post subject: Reply with quote Back to top

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
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Steve48
Vonage Forum MVM
Vonage Forum <b>MVM</b>


Joined: Aug 30, 2005
Posts: 4777

PostPosted: Fri Jun 13, 2008 2:31 pm    Post subject: Reply with quote Back to top

Hmm. Packet losses to server up. Jitter down a bit. Round trip time about the same. Now try what Tglea said- direct connection to modem.

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Steve Gray
Orlando, FL
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jritzi
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Joined: Jun 12, 2008
Posts: 6

PostPosted: Fri Jun 13, 2008 3:11 pm    Post subject: Reply with quote Back to top

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
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tglea
Vonage Forum Evangelist
Vonage Forum Evangelist


Joined: Nov 22, 2006
Posts: 433
Location: Nebraska

PostPosted: Fri Jun 13, 2008 3:40 pm    Post subject: Reply with quote Back to top

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.

_________________
Cox: 9Mbps/800kbps
Router: D-Link DI-624
Vonage: V-Portal
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jritzi
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Joined: Jun 12, 2008
Posts: 6

PostPosted: Fri Jun 13, 2008 8:57 pm    Post subject: Reply with quote Back to top

More fun results. Looks like we'll have to try calling the ISP and see if they can do anything.

>ping -t www.yahoo.com

Pinging www.yahoo-ht3.akadns.net [87.248.113.14] with 32 bytes of data:

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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