HI I have a deployed a SIP based CVP comprehensive 4.1 with ICM 7.2 and UCM 5.0.
when the calls gets transfered to the agent and when the agent tries to do a conference back to IVR the call fails.
on the call server error log i get a message as "Cause code =47 resource unavailable (Verify CCM media or CPU resurces are available)". thinking that MTP is causing the issue i had configured the IOS software based MTP on the Gateway with software sessions as 7000 and the hardware sessions as 150 on the gateway. then i registered the IOS MTP with the Call manager. but i still get the same error on the call server logs. the conference issue doesnt happen for all calls but for a few calls. it also happens during the Lean production hours.