CUCM Call-Disconnect cause 47

Hello all,
     i hve an issue with below senario
ph1----CUCM====CME=====NortelCs1000----ph2
1-when ph1 call ph2 , it rings, then silent call, after 12 sec call disconnect
2-debugging CME, gives; CUCM send disconnect cause 47
3-tracing CUCM give
AuConnectErrorInd | waitDisconnect | MediaManager(1,100,141,11) | MediaExchange(1,100,110,11) | (1,100,65,1).12257-(SEP00262D9FC90F:10.0.3.1)| [R:NP - HP: 0, NP: 2, LP: 0, VLP: 0, LZP: 0 DBP: 0]CI1=17696261 CI2=17696262 clearType=0
10.0.3.1is the ip of CME
4-call from ph2 to ph1 give the same symptom with same errors
5-if a phone registered at CME , it can call ph2 or ph1 normally, with codec g729
please help me to resolve this issue as all users cant call each others

Problem is likely a codec mismatch.  Do you have MTP checked on the trunk between CUCM and CUCME?  When you make calls from the phone to CME, are you sure it is negotiating G729? 
47 typically means a transcoder couldn't be invoked when it wanted one.  I would start looking at codec to see if you can find out what the issue is.

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