[Asterisk-Users] voice quality with asterisk

[voip technocrat]

hello list ,

my set up is like this


ip device -->ser ---> asterisk(astcc) --> pstn gatewsy

my asterisk version is 1.0.2

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 

and also the blurr sound quality along with 

the audio of the ip device at the destination side 

of the pstn line s 

iam useing the open g729 and ulaw and alaw as codecs

so what may be problem 

iam not keeping any overheards on the asterisk box

by not ruuning other services

iam giveng bandwidth of more that 512 kbs to asterisk 

box

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

with regards

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