Mitel <>AVAYA SIP Trunk

[MitelKw]

I am facing this problem of integrating Mitel 3300 Cxii Controller with AVAYA Ip Office Manager using SIP trunks.
Although the setup has been done with the AVAYA team and Mitel Team . The Issue is, the call can be made from AVAYA to Mitel Extn. But not the other way . Either the call gets dropped or the AVAYA trace log reports Error" 402 - Bad Extension" . Both the PBx are on different Subnets. Can anybody help on this issue? or has faced this type of error. please help.

[v2win]

On the IPO side try building the exact digits received in the incoming call route and assign them to the SIP line group.

[Hus4in]

I have documentation, please try and good luck

[MitelKw]

Thanks for the different output. We have been able to sort out the problem. It was the SDP options in MCD 3300.
@Ralph. Thanks for the Documents.
@HUS4IN.. Thanks for the Documents.
@v2win.. Your suggestion has really helped in reaching the source of the error.