Losing audio on incoming calls
M105:
I have a problem that so far I have not been able to solve. It occurs frequently on incoming calls. I answer the phone and start talking, then usually after 1 to 2 minutes into the call the audio goes silent. The other party can hear me but I cannot hear them. Most of the time, after about 10 seconds of silence the audio will return to normal. I have had this happen multiple times on the same call. I would also note that it does not always happen but in the last few days it is occuring on almost 75% of incoming calls. If I place the call this happens much less frequently maybe 1 out of ten calls.
I am running a Netopia 3347-02 (bellsouth version) router on DSL extreme 3.0. I have set the router firewall to "Clear Sailing" and opened all the recommended ports 5222TCP, 433TCP, 4893UDP, 19295UDP, 19302UDP, and 19294UDP. I have the OBi110 configured to a static IP address on my network 192.168.2.24 with 255,255,255,0 netmask. Opening the ports did not appear to help this problem at all. It acted the same way with the firewall set to "Silent Running".
I have used the same router etc. on VOIP with a PAP2NT for a couple of years with no problems. With the Obi and Google Voice though, this problem has existed since day one.
Any suggestions? Anybody else experience anything like this?
RonR:
I'm not sure where those ports (5222TCP, 433TCP, 4893UDP, 19295UDP, 19302UDP, and 19294UDP) came from, but I don't believe they're interesting to the OBi.
The problem is very likely your router. You can prove or disprove this by connecting the OBi directly to your modem and seeing if the problem goes away (if the 3347-02 is an integrated modem/router, that's a problem).
The ports you really want to forward are RTP : 16600 - 16998
M105:
The port list came from Google. http://code.google.com/support/bin/answer.py?answer=62464
The 3347-02 is a fairly high end modem-router that has never caused me a problem with anything else. I don't doubt that it may be an issue here but I would sure hate to have to switch routers just to get GV to work. I would very much like to figure out what is causing the problem and change router settings if that is it. I do have an older DSL modem and separate router I can try. In the meantime I welcome any feedback from any other users who have run into this problem.
RonR:
You shouldn't need to forward those ports.
I would suggest forwarding the RTP ports instead (16600 - 16998) and see if that eliminates the problem. If not, you may have to try a different router. VoIP audio problems (especially one-way audio problems) are nearly always router/NAT related.
M105:
Good idea. I have forwarded the RTP port range and will see if it helps. What makes this so tough is that it is intermittent. It may not do it for 10 calls and then do it three in a row. It is hard to nail down. :)
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