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.
#61912 by secondclaw
Wed Aug 11, 2010 5:01 pm
Hi, I have recently purchased Ooma Core, in my first experiment with VoIP system ... and I am not entirely happy with the result. The people on the other line all hear a fairly obvious background noise/hum while I am talking, though the voice itself is pretty clear. So I tried to use the Echo number to call myself, and sure enough I hear a fairly annoying background noise.

While I was using that echo number, for the first two minutes, the voice was at least clear, then after 2 minutes it starts breaking up - badly ... to the point when I produce a long continuous tone I hear it playing back broken up. When I hang up and redial the number it starts ok, then a few minutes later again starts breaking up ... is that just problem with that number or has that been observed with Ooma before? My WAN connection is 3.0down/1.5up - usually pretty consistent ... and ooma sits between the cable modem and the router.

Is there anything I can do about background noise? It seems to be there all the time, no matter how much or little of traffic there is ...

Thanks.

My VOIP QoS test:
VoIP test statistics
--------------------
Jitter: you --> server: 0.2 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: 2334336 bps
Upload speed: 1394312 bps
Download quality of service: 15 %
Upload quality of service: 99 %
Download test type: socket
Upload test type: socket
Maximum TCP delay: 580 ms
Average download pause: 11 ms
Minimum round trip time to server: 79 ms
Average round trip time to server: 82 ms
Estimated download bandwidth: 58400000bps
Route concurrency: 25.01782
Download TCP forced idle: 90 %
Maximum route speed: 6636448bps
#61918 by murphy
Wed Aug 11, 2010 5:20 pm
Your download QOS is horrible and the maximum TCP delay should be less than 100 ms.
Connect your computer directly to the cable modem and rerun the test.
(You must power cycle the cable modem every time you change what is connected to it.)
#61922 by secondclaw
Wed Aug 11, 2010 6:36 pm
Yea it does look pretty bad.
I plugged in the Cable modem directly:
VoIP test statistics
--------------------
Jitter: you --> server: 0.2 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: 3122624 bps
Upload speed: 1394072 bps
Download quality of service: 48 %
Upload quality of service: 99 %
Download test type: socket
Upload test type: socket
Maximum TCP delay: 396 ms
Average download pause: 8 ms
Minimum round trip time to server: 77 ms
Average round trip time to server: 79 ms
Estimated download bandwidth: 68800000bps
Route concurrency: 22.032751
Download TCP forced idle: 91 %
Maximum route speed: 6808824bps

for a slight improvement ...

I think I will need to call my ISP :(

Would this cause constant background noise also?

Thanks.

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