Hi Anthony Unfortunately I don't know how to force certain QoS information. I'm running Linphone 3.6.1 on Windows 8.1. With the testing I was on a busy wireless network which results in some packets being lost.
If you look at the debug log you'll see entries like the following: message: MSQosAnalyser: lost_percentage=0.000000, int_jitter=15.125000 ms, rt_prop=0.037338 sec message: MSQosAnalyser: everything is fine. message: MSBitrateController: current state is Init If the lost percentage is high linphone increases the ptime, if there hasn't been any loss for a while it decreases ptime Sorry I can't be of more help. Regards, Tracy Briscoe From: [email protected] [mailto:[email protected]] On Behalf Of Anthony Ching Sent: Wednesday, 27 November 2013 4:08 p.m. To: [email protected] Subject: Re: [Linphone-users] limiting RTP size Hi Tracy, I also want to test the voice quality under different ptime parameter. Would you advise how to change QoS information, so that I make a longer RTP (ie.. lower bandwidth) ? rgds, Anthony > From: [email protected]<mailto:[email protected]> > To: [email protected]<mailto:[email protected]> > Date: Wed, 27 Nov 2013 00:41:30 +0000 > Subject: [Linphone-users] limiting RTP size > > Hi > > I have been running some tests with Linphone running on a wireless laptop as > an extension of a NEC Univerge SV8100 PABX. For the tests I've used the G.711 > codec. > > Linphone is smart in that it changes the packet size based on QoS > information, however it appears that the PABX ignores RTP packets of 534bites > or longer, ie Ptime=60 or greater. > Is it possible to limit the Ptime/packet size? I've tried setting the Maximum > Transmission Unit to 512 but this was ignored. > > Regards, > > Mr Tracy Briscoe > Network Engineer > Note: This communication may contain privileged and confidential information intended only for the addressee named above. Any views or opinions presented are solely those of the author. If you have received this message in error, we request you delete the message and notify the sender. Please do not distribute, copy or disclose any information. This e-mail has been scanned for viruses but all liability for viruses or similar in any attachment or message is excluded. St Peter's School, Cambridge, New Zealand Telephone: 647 827 9899 Fax: 647 827 9812 Website: www.stpeters.school.nz<http://www.stpeters.school.nz/> Please consider the environment before printing this email
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