Do you have a transcoder available and registered on the IPIPGW?  This sounds 
like an issue where you may be having a supplementary services problem.  If I'm 
right, you probably can't hold and unhold the call either.


  ----- Original Message ----- 
  From: Sergio Polizer 
  To: ccie_voice@onlinestudylist.com 
  Sent: Thursday, April 02, 2009 8:08 PM
  Subject: [OSL | CCIE_Voice] DTMF digits from CME calls to Unity does not work


  Hi, I'm trying to make DTMF digits be recognize by Unity from CME calls 
through a IPIPGW. This is the topology:

  CME Phone ---h323---> IPIPGW----SIP---->Unity

  Please, May someone give me a suggestion?  Thank You!


  This is the config at CME:

  dial-peer voice 21 voip
   preference 1
   destination-pattern [12]...
   voice-class codec 1
   voice-class h323 1
   session target ipv4:10.2.200.21
   dtmf-relay h245-alphanumeric
   fax protocol pass-through g711ulaw

  This is the config at IPIPGW:

  dial-peer voice 12 voip
   incoming called-number [12]...
   dtmf-relay h245-alphanumeric
  !
  dial-peer voice 13 voip
   destination-pattern [12]...
   session protocol sipv2
   session target ipv4:10.2.200.21
   dtmf-relay rtp-nte (***I tried rtp-nte digit-drop h245-alp but no success)
   codec g711ulaw

  !



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