Cisco CM sip trunked to a 3300 issue

[drsmith45]

Hello Everyone, we are connecting a 3300 to a Cisco Call Manager with sip trunking we are following the guidelines from the Mitel Interop and the Cisco document
everything is working good but when you call a Cisco extension from a Mitel phone , after the 8 rings when it is rerouting to the Unity voice mail you get a busy signal
immmediately ?
calling from a Cisco phone to a mitel phone you get that person voice mail
any Ideas ?
Thanks

 

[Supernova99]

You need to enable the dpnss/q-sig diversion in the system options on the 3300 to yes

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[drsmith45]

Hi Supernova Thank you for the reply
I turn on dpnss/qsig diversion still the same result
calling a Cisco extension after their no answer timer - rings of 8 busy signal and their extension number busy on the Mitel display
if you set the cisco phone to call forward always to the pilot number of the Unity voice mail you get the users greeting