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.
#49913 by cjones78
Mon Mar 08, 2010 2:35 pm
Hi all!
It's been awhile since I posted to this forum because my Ooma has been working swimmingly since October when my number port was completed. However...in the past 3-4 weeks, my Telo has been misbehaving.

The problem I've been having is with dropped calls, both inbound and outbound. It's just very sporadic, but what will happen is that I'll pick up the phone, hear the Ooma dialtone, and dial a number. Then I'll hear the line ring once or twice and then there is a 5-second period of silence, and then I'll hear the Ooma dial tone again. Other times, I can pick up the phone, hear the Ooma dialtone, dial a number and I don't even hear it ring - I'll just hear a 5-second period of silence and then I'll hear the Ooma dial tone again. On outbound calls, I can be in mid-conversation and the line just becomes silent and again, after about 5 seconds or so, I get the Ooma dial tone. There really is no pattern to these dropped calls. I thought it might be the relatively new AT&T DECT 6.0 cordless phones we purchased, but would that even have anything to do with it?

We have Comcast 50Mbps Internet service and the network set up is as follows:

Motorola SB6120 SURFboard DOCSIS 3.0 Cable Modem --> D-Link DIR-655 Extreme N Wireless Router --> Ooma Telo hangs off the router.

I have rebooted the cable modem and the router multiple times, and unplugged the Telo for a good 10-15 minutes multiple times and it still hasn't helped with the dropped calls. I also enabled fax mode for both phone numbers in the My Ooma account but that didn't seem to help, either.

I ran the following speed test at this website: http://whichvoip.com/voip/speed_test/ppspeed.html

The results are below:

VoIP test statistics
--------------------
Jitter: you --> server: 0.3 ms
Jitter: server --> you: 1.1 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: 4325688 bps
Upload speed: 9215080 bps
Download quality of service: 80 %
Upload quality of service: 62 %
Download test type: socket
Upload test type: socket
Maximum TCP delay: 84 ms
Average download pause: 5 ms
Minimum round trip time to server: 89 ms
Average round trip time to server: 91 ms
Estimated download bandwidth: 34400000bps
Route concurrency: 7.952492
Download TCP forced idle: 83 %
Maximum route speed: 5890784bps
#49923 by murphy
Mon Mar 08, 2010 4:51 pm
Something is wrong.
On the 50 mbit service you are getting 4.3 down and 9.2 up.
Connect to http://192.168.100.1 which is a web page inside your SB6120.
Click on the Signal tab and report the Signal to Noise Ratio, the downstream power level and the upstream power level.
#49927 by cjones78
Mon Mar 08, 2010 5:50 pm
murphy wrote:Something is wrong.
On the 50 mbit service you are getting 4.3 down and 9.2 up.
Connect to http://192.168.100.1 which is a web page inside your SB6120.
Click on the Signal tab and report the Signal to Noise Ratio, the downstream power level and the upstream power level.


The Signaling to Noise Ratio is:
36 dB for Bonding Channels 1,2, and 3

The Downstream Power Level is:
0 dBmV for Bonding Channel 1
-2 dBmV for Bonding Channel 2
0 dbmV for Bonding Channel 3

The Upstream Power Level is:
50 dBmV for Bonding Channel 1

Here's a pic of the webpage:

Image
#49930 by cjones78
Mon Mar 08, 2010 7:01 pm
I just ran the VoIP test again before I head to bed. This time is says my estimated download bandwidth is 62.5Mbps (that's about right, but how does it know this?), but the download speed is only 2.3Mbps and the upload speed is 7.9Mbps?

VoIP test statistics
--------------------
Jitter: you --> server: 0.2 ms
Jitter: server --> you: 3.6 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: 4.0

Speed test statistics
---------------------
Download speed: 2340392 bps
Upload speed: 7945064 bps
Download quality of service: 98 %
Upload quality of service: 96 %
Download test type: socket
Upload test type: socket
Maximum TCP delay: 94 ms
Average download pause: 18 ms
Minimum round trip time to server: 90 ms
Average round trip time to server: 91 ms
Estimated download bandwidth: 62400000bps
Route concurrency: 26.6622
Download TCP forced idle: 91 %
Maximum route speed: 5825328bps

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