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Ring Back Fails Between 6.x and 4.x

asafayan
Level 4
Level 4

‎09-04-2008 08:06 AM - edited ‎03-15-2019 01:03 PM

I have a 4.x Call Manager system tied to a 6.x UC system via an ICT.

When a call is made to the reception on the 4.x side and she transfers the caller to a 6.x phone, the caller never hears ring back - yet the call goes thru and the calling part does hear his phone ring.

This is only happening to this one phone!!

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Not applicable

‎09-10-2008 06:26 AM

To get around this issue, remove the MTP resources from the Media Resource Group which the ICT is a member of.

CSCdx65927: No ringback for blind transfer of ICT using MTP

Troubleshooting No Ringback Tone on ISDN-VoIP (H.323) Calls:

http://www.cisco.com/en/US/tech/tk1077/technologies_tech_note09186a0080094c33.shtml

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