[asterisk-users] Suddenly the voice became garbage (likerobot)using Asterisk 1.4.19.2

[Michelle Dupuis]

We had the problem between 2 extensions on same PBX.  Both ends using Aastra
phones.

Not sure where to point the finger... 

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Miguel Molina
Sent: Monday, June 01, 2009 2:15 AM
To: Asterisk Users List
Subject: Re: [asterisk-users] Suddenly the voice became garbage
(likerobot)using Asterisk 1.4.19.2

Michelle Dupuis escribió:
> 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??!!
>   
It sounds like an ISP problem. Is your bandwidth ok? Do you share the
connection with another services? In my case, usually "robot" calls are
related to upload congestion, and implementing egress QoS policies on the
router helped a lot to maintain the good quality of the calls. This may be
your case.

If your asterisk worked fine for one entire year flawlessly, you surely
can't blame it for bad call quality.

Cheers,
> 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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--
Ing. Miguel Molina
Grupo de Tecnología
Millenium Phone Center


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