asterisk users - Jun 2009 - Suddenly the voice became garbage (like robot) using Asterisk 1.4.19.2

Hi All;

I was using since one year Asterisk 1.4.19.2 and zaptel 1.4.10.1 and they were
working fine via SIP, IAX and Digium fxo and fxs ports.

Suddenly just before 2 or 3 days, the voice become garbage like robot when I
place a call from the SIP Phone (which is in a country and the Asterisk box in
another country). I am surprise what is the reason that let rtp become like this
! The sound now like robot (human machine:)--

What could be? Actually before about 10 days, we added one Polycom SIP Phone and
added qualify=yes for the SIP entities, also I fixed the externip to be the
public IP address of the machine, and I fixed the localnet (I was not using
externip and localnet, because I was not need them for NAT issues, but I used it
when I start have NATed Polycom devices). But even, the voice was fine after
these changes, so I do not think it has any relation.

Could it be related the Asterisk 1.4.19.2 and how it manipulated the rtp
packets, so maybe a small changes in the Internet provider effected and let
things becoming bad??!!

I used gsm and g729 codecs, and both are bad. g729 give little bit better
quality than gsm (and both are bad now .. garbage). The voice becoming bad even
if we do a call using IAX Trunk or from SIP Phone (Polycom).

Any advise what can I do?

Regards
Bilal

You're not alone...we never found the cause of this (rare) occurance... 

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of bilal ghayyad
Sent: Sunday, May 31, 2009 8:58 PM
To: Asterisk Users List
Subject: [asterisk-users] Suddenly the voice became garbage (like
robot)using Asterisk 1.4.19.2


Hi All;

I was using since one year Asterisk 1.4.19.2 and zaptel 1.4.10.1 and they
were working fine via SIP, IAX and Digium fxo and fxs ports.

Suddenly just before 2 or 3 days, the voice become garbage like robot when I
place a call from the SIP Phone (which is in a country and the Asterisk box
in another country). I am surprise what is the reason that let rtp become
like this ! The sound now like robot (human machine:)--

What could be? Actually before about 10 days, we added one Polycom SIP Phone
and added qualify=yes for the SIP entities, also I fixed the externip to be
the public IP address of the machine, and I fixed the localnet (I was not
using externip and localnet, because I was not need them for NAT issues, but
I used it when I start have NATed Polycom devices). But even, the voice was
fine after these changes, so I do not think it has any relation.

Could it be related the Asterisk 1.4.19.2 and how it manipulated the rtp
packets, so maybe a small changes in the Internet provider effected and let
things becoming bad??!!

I used gsm and g729 codecs, and both are bad. g729 give little bit better
quality than gsm (and both are bad now .. garbage). The voice becoming bad
even if we do a call using IAX Trunk or from SIP Phone (Polycom).

Any advise what can I do?

Regards
Bilal


      

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