[Asterisk-Users] voice quality with asterisk

[Matt Riddell]

voip technocrat wrote:
> hello list ,

Hello!

:-)

> my set up is like this
> 
> ip device -->ser ---> asterisk(astcc) --> pstn gatewsy
> my asterisk version is 1.0.2

Latest stable package is 1.03 with 1.04 to be released very shortly :-)

> iam using the ser as registration and asterisk aa the 
> prepaid one with the help of the astcc.
> now my problem is the destination people 
> i.e  the pstn line s are listening low voice 

You need to let us know what devices you are using.

> and also the blurr sound quality along with 
> the audio of the ip device at the destination side 
> of the pstn lines 

As above.

> iam useing the open g729 and ulaw and alaw as codecs

No such thing as open g729.  G729 is a patented codec.  If you are using 
it in a nation with a government, chances are that the patent is upheld. 
(People - don't flame on this, we all know everybody's opinions on the 
topics of codec patents)

> so what may be problem 
> 
> iam not keeping any overheards on the asterisk box
> by not ruuning other services

So there is nothing else running on the Asterisk box?

> iam giveng bandwidth of more that 512 kbs to asterisk 

With Quality of service?  Are there any packet drops?

> so any body can suggest any new things to done to
> improve the sound quality

As above, let us know what devices you are using.  I would say that the 
PSTN GW is the likely culprit.  Does it have any settings for 
receive/transmit gain adjustment?

-- 
Cheers,

Matt Riddell
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