asterisk users - May 2010 - Problem of hearing attended transfer' s sound

Dear all,

We have been using asterisk for 4 years. Now we have got problems which
occurs during the attended transfer.
During attended transfer, sometimes we cannot hear the sound of
'pbx-transfer'. Sometimes we can hear little portion of
'pbx-transfer's sound. That means sound also become noisy.

I cannot understand why this is happening?
log is :

 -- Started music on hold, class 'default', on
SIP/113.34.235.13-b7a3f110

-- <SIP/0000185148-092db338> Playing 'pbx-transfer' (language
'jp')



Although it is showing Playing 'pbx-transfer' (language 'jp'),
but we
cannot hear 'pbx-transfer' sound
Sometimes we can hear the sound of 'pbx-transfer' and sometimes we
cannot hear. is it the problem of server load or memory load or
something else? Please let me khow.


The message of asterisk log is always same.so it is very difficult to
understand the problem.

Our system is as like as:
The number of User agent is: 1650
The number of Actual registered user agent is: 600


Asterisk and the User-Agent is connected through the Internet.

......And Is there any solution to solve this problem? We have
investigated in several places but we cannot find out the reason?
We need this solution very urgently. Is there any one who can solve
this problem?


Thanks in advance

Nahar
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