Receiver can't hear anything

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Joined: Thu Mar 25, 2010 3:43 pm

Receiver can't hear anything

Post by haneef » Sat Mar 27, 2010 1:52 pm


My ooma was working properly till my number was ported. After number porting, I'm able to make and receive call. But the other side is not able to hear my voice. I can clearly hear their voice. Just don't understand what is the problem

I'm using comcast cable modem with download speed of 12mbs


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Joined: Tue Apr 28, 2009 6:50 pm
Location: North of Milwaukee WI

Re: Receiver can't hear anything

Post by Leeway » Sat Mar 27, 2010 3:51 pm

Have you rebooted "everything" since the port was completed?

Posts: 5
Joined: Thu Mar 25, 2010 3:43 pm

Re: Receiver can't hear anything

Post by haneef » Sun Mar 28, 2010 7:10 pm


I still don't understand what is happening.

1) Called ooma support, and asked me to do ping test via and the result showed packet loss of 60%. So they asked me to check with comcast which is my isp
2) Called comcast and they tested from there side, they see 0 packet loss
3) I tested with and it shows o% packet loss

VoIP test statistics
Jitter: you --> server: 3.0 ms
Jitter: server --> you: 3.0 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: 11053736 bps
Upload speed: 3333040 bps
Download quality of service: 80 %
Upload quality of service: 79 %
Download test type: socket
Upload test type: socket
Maximum TCP delay: 67 ms
Average download pause: 2 ms
Minimum round trip time to server: 37 ms
Average round trip time to server: 73 ms
Estimated download bandwidth: 23200000bps
Route concurrency: 2.0988379
Download TCP forced idle: 69 %
Maximum route speed: 14169728bps

4) I manually pinged the server from my command promot, it doesn't show any packet loss

Now I more confused. Whom to believe?
1), 2) comcast support 3) ooma support, 4) whichvoip result, 5) my manual ping test

Found out: My mortrola SBG901 modem/wireless router's firewall is the cause of the problem. If i disable the firewall everything works fine.

One more question:
Does any one know which port ooma is using? I can selectively allow those port instead of disabling the firewall altogether

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