Process of elemination. Test with multiple phones, check the codec being used 
and make sure the file is there and available.

  ----- Original Message ----- 
  From: kamrun nahar bina 
  To: asterisk-users@lists.digium.com 
  Sent: Friday, May 07, 2010 07:33
  Subject: [asterisk-users] Problem of "Playing 'pbx-transfer'"


Dear all,We have been using asterisk for 4 years. Now we have got problems 
whichoccurs during the attended transfer.During attended transfer, sometimes we 
cannot hear the sound of 'pbx-transfer'.
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 it cannot 
hear 'pbx-transfer' soundSometimes we can hear the sound of 'pbx-transfer'. is 
it the problem of network load or phone-set or something else? Please let me 
know. I am using x-lite and snom 300. 
Before i tested it for memory load, And found out that it is not a memory 
problem.Our system is as like as:The number of User agent is: 1650The number of 
Actual registered user agent is: 600Our System configuration is :
IBM X3550CPU: Intel(R) Xeon(R) CPU X5460 @ 3.16GHzHDD: 3.5 SATA 1TB x 2version 
of asterisk: 1.4.23.1our memory size is 4GB.concurrent calls no : 30.Our memory 
condition is below :
Cpu(s):  0.3%us,  0.7%sy,  0.0%ni, 98.5%id,  0.0%wa,  0.1%hi,  
0.3%si,0.0%stMem:   4147888k total,  3986540k used,   161348k free,    76852k 
buffersSwap:  2031608k total,       56k used,  2031552k free,  3170396k cached
  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND23160 root  
    15   0  440m 415m 5688 S  4.3 10.3 398:13.93 asteriskOur disk space 
condition is below:Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00                      901G  245G  610G  29% 
//dev/sda1              99M   18M   77M  19% /boottmpfs                 2.0G    
 0  2.0G   0% /dev/shmAsterisk and the User-Agent is connected through the 
Internet.
......And Is there any solution to solve this problem? I haveinvestigated in 
several places but I cannot find out the reason?I need this solution very 
urgently. Is there any one who can solve this problem?
-- 
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