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Unity & CM Hunt Group call routing failure

Hello.  Thank you in advance for any pointers.  I have the following call routing issue:


On CM 8.6 dial Hunt Pilot 5000 from an internal IP Phone ==> Hunt Pilot 5000/Hunt List/Line Group ==> If not answered, goes to Unity User box 5000 (this flow is successful)

Enter 5000 while in a Unity Connection Call Handler ==> Transfer to Hunt Pilot 5000/Hunt List/Line Group ==> if not answered, the call disconnects.

The root issue is that when a caller enters 5000 in a Unity Connection Call Handler, the call successfully goes to the CM Hunt Pilot but then does not following the RNA/Busy forwarding to voicemail.  Rather, the call disconnects. 

Any chance anyone knows a solution to this?

Thank you so much.


Cisco Employee

Unity & CM Hunt Group call routing failure

Hi Dan,

Tough to say without pulling some CUCM traces.  Typically call drop symptoms like that are related to codec mismatch.  From a Unity standpoint, it's just performing a blind transfer to your hunt pilot.  You can try a similar test by calling from an IP phone A to another IP phone B, then put IP phone A on hold and transfer the call to your hunt pilot, let it RNA and see if the same behavior happens.  The only potential difference in that test call flow would be the partitions/search space on the VM ports of Unity vs. what's assigned to your phones.  So, it may not hurt to try and assign the VM port partition/search space to an IP phone to get a 1:1 test. 

That's been my experience with Unity, maybe someone else having a similar symptom could weigh in too.

Hope that helps,


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