Hi Minh,
Thx for the response. I've considered that but ruled it out. Doing a packet capture on the HT end, I am sending about 30-36 pkts per second, totaling about 4500 bytes on the wire per second . S o I am only transmitting about 5 Kbs. Even a low upload speed could handle that. This is more than an 'inconvenience' for using TCP for voice traffic. It would make TCP unusable for voice traffic. I have worked with other products that did SIP/RTP using TCP and we did not have this delay problem. Jeff ----- Original Message ----- From: "Minh Phan" <[email protected]> To: "Jeff Theinert" <[email protected]> Cc: [email protected] Sent: Tuesday, July 7, 2009 1:02:49 AM GMT -08:00 US/Canada Pacific Subject: Re: Http Tunnelling Hi Jeff, Is your local end using an ADSL connection? If it is the case, the increasing latency might be caused by the limited upload speed. If the connection speed from your phone to the HTTP server is low, the TCP protocol would naturally increase the delay between packets in order to avoid packet loss. Hence, increase the latency. This is the inconvenience of using TCP for voice traffic. Best regards, Minh 2009/7/7 Jeff Theinert < [email protected] > Hi, I have HTTP tunnelling working under Windows, but there is a problem I cannot resolve. During a call where the local end is using HTTP tunnelling, the audio latency to the remote end degrades by about 1.6 seconds per minute the call lasts. The audio latency from remote end to local end is consistent. I checked the server code and found that it was compiled with debug messages, but even recompiling to eliminate the debug messages did not change the degrading latency. I cannot find anything specifically causing a delay in the client. If I set a breakpoint in Visual Studio and let the program sit for 20-30 seconds, when I resume, the latency is back to normal, but then begins to degrade again. Since all threads in VS are frozen at that point, that makes me believe this is a server issue. But since the server code has not changed in 3 years, I would expect that some one would have reported this as a problem. Any ideas to resolve this are greatly appreciated. Jeff Theinert _______________________________________________ QuteCom-dev mailing list [email protected] http://lists.qutecom.org/mailman/listinfo/qutecom-dev
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