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Re: [Linphone-users] Fwd: My first post (codec question)


From: Daniel Sokolowski
Subject: Re: [Linphone-users] Fwd: My first post (codec question)
Date: Mon, 02 Jul 2012 23:45:29 -0400
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0) Gecko/20111105 Thunderbird/8.0

Hi John, unfortunately I can't assist - I am just a user of the software on a windows machine and it works fine here. Maybe someone else can chime in.

On 02/07/2012 22:46, John White wrote:
PS. I don't mean to say that I switched back to Twinkle permanently. Just needed to in order to get my work done. I hope to switch to linphone. I know, a year or so ago, I tried an earlier version of linphone but never could work out the sound quality problems. I like the new interface on 3.5.2. and hope to get the sound quality problem put to bed soon.

John White wrote:
Thanks for the prompt response. I have used Twinkle/diamondcard.us regularly for a couple of years and don't have that problem. Voice quality is very good on Twinkle. However, it took me quite a while to figure out that, on Twinkle, I could only use G.711 (A-law and G.711 (u-law) codecs.

Also, though I have only tested the linphone video one evening, I don't think I had those problems with the video. I wasn't paying much attention to audio that evening.

On some calls, linphone, with only PCMU and PCMA codecs loaded, works fine. Yesterday, I called my daughter's cellphone using linphone and, with those two codecs loaded, spoke to her for half an hour with very good voice quality and no drops.

However, the mentioned problems with linphone are bad enough on both my fast office (charter.net) and less fast home (dsl) systems that, today, I switched back to Twinkle.

John


Daniel Sokolowski wrote:
Dropped sound like an issue with your SIP provider rather then linphone, have you tried other voip clients and what were the results ?

On 02/07/2012 20:37, John White wrote:
Afraid I sent this earlier to wrong address. Here it is again, with apologies.

I don't know what codecs to use to prevent linphone from dropping calls and to enhance voice quality. I have a pretty fast internet connection through charter.net. I use usb headphones. My system is slackware linux. My computer is a samsung laptop (Vector Linux 7.0 xfce4 Samsung RF511 S03). I downloaded linphone 3.5.2 from the vector repositories. I use diamondcard.us for phone calls.

I have tried various combinations of codecs but none seem to work very well. Best so far seems to be PCMU and PCMA by themselves (only) but that doesn't seem to work reliably.

I would appreciate a suggestion of what codecs I should have activated and what order to have them in.


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--
Daniel Sokolowski
Web Engineer
Danols Web Engineering
http://webdesign.danols.com/




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