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.
#97105 by thunderbird
Thu Jun 21, 2012 8:25 pm
rocksockdoc:
From your Phonepower Speed Test Advanced readings, your jitter server you of 21.9 ms should be under 5 ms, and packet loss and discards should be Zero. These out of limt values are usually and indiacation of a defective or malfunctioning Modem, or poor Internet provider signal.

Try removing power from your Modem then repowering your Modem. Better yet if your Modem can be reset do that. Reference your Modem owner's Manual for procedure.
Note: If your modem contains a battery, it must be temporarily removed for a successful Modem Reboot or Reset. Reference your Modem owner's manual.
If that doesn't help, replace your Modem. If that doen't help contact your Internet provider to correct their Internet signal coming into your home.
#97108 by rocksockdoc
Thu Jun 21, 2012 8:57 pm
thunderbird wrote:your jitter ... of 21.9 ms should be under 5 ms

Yuck. Thanks for the metric to aim for.

thunderbird wrote:packet loss and discards should be Zero

Double yuck.

thunderbird wrote:indication of a defective or malfunctioning Modem, or a poor Internet provider signal


There is no modem ... so that pretty much leaves the wireless ISP as my next step.

thunderbird wrote:Try removing power from your Modem


There is no modem; but I have repowered and reset the router to defaults and then reset all the settings to little avail. I've also disconnected & reconnected the POE which powers the rooftop antenna & radio aimed at the line-of-sight WISP access point.

What worked best (somewhat) were the aforementioned QoS settings in the Linksys WRT54G v5 router - but there's still more to do - if I only knew how to debug the exact cause of the lousy VOIP quality.

thunderbird wrote:contact your Internet provider to correct their Internet signal coming into your home.


I sent my WISP provider a link to this thread! :)
#97109 by lbmofo
Thu Jun 21, 2012 9:02 pm
Yes, I think manually specifying upstream is better... example, I found my router measuring my upstream to be 500Kbps when it should be 2000Kbps. For you I think 400Kbps would be a good round number to use.

WMM, I find conflicting stories out there. http://www.smallnetbuilder.com/wireless ... s-with-wmm

If it was off before, leave it off (unless enabling is required for QoS to work). But you can probably do some testing with it on and with it off.

Those port priority settings you've added...I'd recommend removing those. I think QoS by MAC is good enough. Dups and redundant entries to achieve the same thing may create more problems than benefits is what I hear.
#97112 by rocksockdoc
Fri Jun 22, 2012 4:43 am
lbmofo wrote:Yes, I think manually specifying upstream is better...

Thanks for the helpful advice. I have it set to manual, and 400 Kbps.

lbmofo wrote:WMM, I find conflicting stories out there. http://www.smallnetbuilder.com/wireless ... s-with-wmm


I read and re-read that article but I didn't quite get it. Apparently WMM blocks acknowledgements (ACKs) to enable 802.11n high throughput rates. I'm not sure how that applies to Ooma. Is the Ooma WiFi adapter "n" ?

lbmofo wrote:But you can probably do some testing with it on and with it off.

I can easily turn WMM on and off to test - but the voice quality is a subjective test - so I'm not sure if there is an objective test that will work for us.

lbmofo wrote: redundant entries to achieve the same thing may create more problems than benefits is what I hear.


Good point. I'll remove the port speedup settings.

What's the best 'objective' test of VOIP quality to test the value of any particular QoS change in the router?

Is it the test sequence that I already ran at the beginning of this thread?
#97116 by lbmofo
Fri Jun 22, 2012 5:59 am
Yes, best test I know is the speedtest.phonepower.com that you are doing.

Location based speedtest or line quality test (to see how Ooma would do, pick a location near the Bay area); pick VoIP testing. (example: Current Test: VoIP Test Location: USA: San Jose, California)

http://myspeed.visualware.com/indexvoip.php

Yes, Ooma wifi adapter is N up to 150Mbps.
#97850 by rocksockdoc
Mon Jul 16, 2012 2:25 pm
lbmofo wrote:Current Test: VoIP Test Location: USA: San Jose, California)


By way of update ... I called my ISP who switched me to the next tier of service (for extra money!) on the 15th of this month.

So now my new http://www.phonepower.com/speedtest is as follows:
1. download = 8.96 Mbps
2. upload = 3.77 Mbps
3. jitter = 7.1 ms
4. packet loss = 0.0%
5. MOS = 4.1

Advanced:
a. download = 8961 kbps
b. upload = 3771 kbps
c. download consistency = 69%
d. upload consistency = 8%
e. download test type = socket
f. upload test type = socket
g. maximum T delay = 76 ms
h. average download pulse = 2 ms
i. minimum round trip = 36 ms
j. average round trip = 87 ms
k. estimated download bandwidth = 20800 kbps
l. route concurrency = 2.321122
m. download TCP forced idle = 71%
n. maximum route speed = 14563 kbps
o. jitter you--> server = 7.1ms
p. jitter server->you = 2.1ms
q. packet loss you-->server = 0.0%
r. packet loss server->you = 0.0%
s. packet discards = 0.0%
t. packets out of order = 0.0%
u. estimated MOS score = 4.1
final.jpg
Results from http://www.phonepower.com/speedtest
final.jpg (105.26 KiB) Viewed 4283 times


I'm not sure what now to set my QoS to on my Ooma and router because I don't know the algorithm for doing so.

Any ideas what the 'new' settings should be for the QoS of the Ooma and of the Linksys Router and of the Ubiquiti antenna/radio on the roof?
Last edited by rocksockdoc on Mon Jul 16, 2012 5:32 pm, edited 1 time in total.
#97851 by rocksockdoc
Mon Jul 16, 2012 2:31 pm
lbmofo wrote:http://myspeed.visualware.com/indexvoip.php


I picked San Jose and this is what I got for jitter:
1.png
1.png (44.56 KiB) Viewed 4283 times

Here are the upload speeds:
2.png
2.png (33.75 KiB) Viewed 4283 times

Here are the download speeds:
3.png
3.png (30.47 KiB) Viewed 4283 times


Q: What would be the algorithm for setting the QoS in my Ooma, my home broadband router, and in my rooftop antenna/router?
Last edited by rocksockdoc on Mon Jul 16, 2012 5:35 pm, edited 1 time in total.
#97852 by rocksockdoc
Mon Jul 16, 2012 2:33 pm
lbmofo wrote:http://myspeed.visualware.com/indexvoip.php


Here are the rest of the graphs (you can only attach 3 at a time).
4.png
4.png (36.58 KiB) Viewed 4283 times

5.png
5.png (25.09 KiB) Viewed 4283 times


Q: What do I use of the above to run the algorithm that tells me what QoS to set my oooma, my home broadband router, and the router/radio transceiver on my roof?
#97853 by thunderbird
Mon Jul 16, 2012 2:59 pm
rocksockdoc:
You need to use http://www.phonepower.com/speedtest for the Upload and download speeds.

If you are connected Modem-Ooma-Router set the Upstream and Downstream Quality of Service settings in Ooma Setup, Advance page to 80 % of the Phonepower Speedtest results.

If you are connected Modem-Router-Ooma, set the Upstream and Downstream Quality of Service settings in Ooma Setup, Advance page to ZERO.
#97855 by lbmofo
Mon Jul 16, 2012 3:10 pm
I personally use http://speedtest.net/ to measure speeds to put in QoS. I don't put in precisely 80%; I go with a number between 90% and 80% but good, clean looking rounded number.

thunderbird is right in that if your Ooma is between modem and router, set the QoS in Ooma.

If Ooma is behind the router, set Ooma QoS to all 0. Do QoS in your router instead based on Ooma IP address/MAC address.

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