This forum includes tips for maintaining the best audio quality possible with the Ooma System. If your Ooma system is having issues with dropped calls, static audio or echo, look here for assistance.
#20419 by jdprice3
Wed Sep 16, 2009 2:36 am
niknak wrote:
...We have fast up/download cable internet (last speedtest.net result was 10MB down and 4MB up -- or whatever their speed metric is)...


VOIP call quality is dependent on many other factors besides speed. Neighborhood loading, latency, jitter, etc. can also degrade call quality. Run the speed test here
http://www.whichvoip.com/voip/speed_test/ppspeed.html

and post all of your results and someone will help interpret them

...Can I "reserve" more bandwidth for ooma?..


There are ways to set QOS to give priority to calls depending how yours is set up. Modem - Ooma - PC? or Modem -Router-PC + Ooma
Once again post your configuration and someone will help



Setup is in my OP. Thx.
#20501 by jdprice3
Wed Sep 16, 2009 2:39 pm
Setup: Cable Modem --> ooma --> Apple Airport Extreme

Here are the results of the test from the link you provided:

VoIP test statistics
--------------------
Jitter: you --> server: 1.2 ms
Jitter: server --> you: 1.2 ms
Packet loss: you --> server: 0.0 %
Packet loss: server --> you: 0.0 %
Packet discards: 0.0 %
Packets out of order: 0.0 %
Estimated MOS score: 4.1

Speed test statistics
---------------------
Download speed: 5596992 bps
Upload speed: 2797064 bps
Download quality of service: 56 %
Upload quality of service: 67 %
Download test type: socket
Upload test type: socket
Maximum TCP delay: 108 ms
Average download pause: 4 ms
Minimum round trip time to server: 99 ms
Average round trip time to server: 100 ms
Estimated download bandwidth: 33600000bps
Route concurrency: 6.0032244
Download TCP forced idle: 85 %
Maximum route speed: --


Thanks for your help.
#20504 by jdprice3
Wed Sep 16, 2009 2:52 pm
I did one more test to see. Here are the results of test 2:

VoIP test statistics
--------------------
Jitter: you --> server: 0.6 ms
Jitter: server --> you: 1.5 ms
Packet loss: you --> server: 0.0 %
Packet loss: server --> you: 0.0 %
Packet discards: 0.0 %
Packets out of order: 0.0 %
Estimated MOS score: 4.1

Speed test statistics
---------------------
Download speed: 5667160 bps
Upload speed: 3454928 bps
Download quality of service: 87 %
Upload quality of service: 63 %
Download test type: socket
Upload test type: socket
Maximum TCP delay: 104 ms
Average download pause: 3 ms
Minimum round trip time to server: 98 ms
Average round trip time to server: 99 ms
Estimated download bandwidth: 27200000bps
Route concurrency: 4.799582
Download TCP forced idle: 80 %
Maximum route speed: --
#20518 by niknak
Wed Sep 16, 2009 3:37 pm
...When I call in to my wife, there seems to be a short delay between what I say and when she hears it...


Your upload QOS is not good
Download QOS is not much better
Also Maximum TCP delay is right about where voice quality starts to degrade.

Good numbers would be above 95% for upload/download QOS
TCP delay should be somewhere under 100ms

You have network issues not related to speed. You may need to check QOS settings on the OOMA hub or place the hub behind your router and adjust QOS from there.

There also may be issues with your modem, or ISP provider which are causing your problem
#20526 by niknak
Wed Sep 16, 2009 4:51 pm
power off all devices
try rebooting the cable modem first, let it come on fully
then the ooma, then the router
then rerun the tests

don't worry - others here have made it work by using QOS
(I have FIOS and never had any network issues and did not need to setup QOS)

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