Ticking sound when using gsm codec

[iulianm]

I have a very strange problem .

When I log in the servers using gsm codec, I get a ticking/clicking sound in the background wich is not constant .. for a couple of seconds is silcence .. and after that again ticking sound ... Is like when you plug a jack in a amplifier in Line In and you put your hand on the other jack and you get that kind of noise....


If I switch to alaw I have no problem ... I tried using sangoma usb timer but there is no difference . ( I have 5 asterisk servers installed with vicibox 3.0.8 )


If I make direct calls from the softphone using gsm codec I have no such problems, so is related directly to meetme conferences. The only difference is if I switch to G.711 codec. The problem goes away

The version of my installation is like this:

ViciBox 3.0.8:

Asterisk version: Asterisk 1.4.27.1-vici
SVN version: 2.4-338a BUILD: 110923-2043
I have 5 x Asterisk/Web server & 1 x DB

The asterisk are:

Dell 3 x R310 , 1 x R410 & 1 x DELL PowerEdge 2950

All of theme was installed from ViciBOX 3.0.8 64Bit ISO with nothing extra installed

I will take to post the specs on PowerEdge 2950 because it has only 20 extension on it and we cannot speak of load:

CPU: 2 x Intel(R) Xeon(TM) CPU 3.20GHz
RAM: 4GB
HDD: 2 x 15k 146GB SAS & PERC 5i RAID 1 controller
SANGOMA USB TIMER with wanpipe-voicetime-1.0.13 driver



I have tried on all these servers with / without sangoma usb timers and makes no difference.

Code: Select all

vici4:~ # /etc/init.d/dahdi status
### Span  1: WANVTIME/1 "WANVTIME/1 (source: wanpipe_voicetime) 1" (MASTER)

Code: Select all

vici4:~ # asterisk -rg
Asterisk 1.4.27.1-vici, Copyright (C) 1999 - 2008 Digium, Inc. and others.
Created by Mark Spencer <markster@digium.com>
Asterisk comes with ABSOLUTELY NO WARRANTY; type 'core show warranty' for details.
This is free software, with components licensed under the GNU General Public
License version 2 and other licenses; you are welcome to redistribute it under
certain conditions. Type 'core show license' for details.
=========================================================================
Connected to Asterisk 1.4.27.1-vici currently running on vici4 (pid = 8771)
vici4*CLI> dahdi show status
Description                              Alarms     IRQ        bpviol     CRC4
WANVTIME/1 (source: wanpipe_voicetime)   UNCONFIGUR 0          0          0
vici4*CLI>


[williamconley]

have you checked jitter?

sip vs iax?

[iulianm]

I don't know what to check about jitter.. jitterbuffer doesn't work to app meetme .. and I have sofphones locally

I am using SIP for the softphones .... So even if I connect to the server and I am in pause so I am the only one in the conference I get the ticking noise.. for 2-3 seconds is very loud and for 20-30 seconds it's silence .. then again starts the noise for 3-4-5 seconds and again silcence . Is somewhere gsm to slin the problem I think.

I tried with different softphones ( Ekiga/Zoiper/Eyebeam ) but makes no difference

Anyway , another thing to mention: I switched on g729 on one server and , I have no ticking sound , just like using alaw.


I think I will move go g729