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SIP trunk between CCM 4.1(3) and Mitel 3300 IPC

Did anybody tried this. I have the calls from Cisco CCM to Mitel working, but not the reverse.

Cisco is receiving Invite, Mitel phone thinks it connected but I do not get Cisco phone to ring. Mitel phone times out.

I know that it was tested by Mitel on 5.x

Any tips apprecited.

-- jerzy

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