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MaxSok / asterisk-chan-dongle

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Strange noise #54

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago 
I hear a strange noise when I call through chan_dongle.
Sometimes the sound is good during call, but suddenly the attached sound comes 
for shorter or longer period (up to 5-6s).

Asterisk version is 1.6 branch, yesterdey I've tried chan-dongle's svn version 
and now I have the downloadable 1.1.r10 version installed.

The problem is the same using two sticks (Huawei K3520 and K3565).

Setup:
- Phone_1 (Analogue) --alaw--(SPA-3000)--> asterisk
- Phone_2 (Analogue) --alaw--(SPA-3000)--> asterisk
- Phone_3 (Mobile) --ilbc--(N900)--> asterisk
- Phone_line (Service Provider) --alaw--> asterisk

It seems there is no problem, when I call from Phone_1 using Phone_line to 
chan_dongle and pick up using Phone_2 or call from Phone_1 using chan_dongle to 
Phone_line and pick up using Phone_2.

...but I hear this noise in the same situation when I pick up using Phone_3 in 
both directions (incoming or outgoing call), but I hear it always in Phone_1's 
receiver (and never in Phone_3).

I think it is something around ilbc and alaw connection, but otherwise I never 
had any problems with Phone_3 (other directions) and I use it almost every day 
to call using the same codec over SIP.

What could cause this problem?
Maybe does any workaround exist that could resolve this issue?

Thank you your help.

Original issue reported on code.google.com by VaZso...@gmail.com on 30 Dec 2011 at 7:57

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GoogleCodeExporter commented 9 years ago 
Sorry, OS is Debian Squeeze and Asterisk's source was downloaded from its own 
site.

Original comment by VaZso...@gmail.com on 30 Dec 2011 at 8:02