[cisco-voip] 3rd Party SIp phone with CUCM 6.1

[Cool Boy]

Hi All.
 
I am using CUCM 6.1 and able to register a 3rd party SIP phone with CUCM. I have the below setup
 
1 x Cisco Communication manager 6.1
4 x Cisco SCCP phones
2 x Cisco SIP phones
2 x 3rd party SIP phones
 
I am facing the below problems
 
A- 3rd Party sip phones are not playing MOH ( When SIP put Cisco SCCP or Cisco SIP phones on hold, they are not hearing MOH but if Cisco phones put on hold, I am able to hear MOH on SIP phones).
 
Please help if you can 
 
Thanks in Advance.


      
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