SIP client on MCD can't dial out

[JasonTaylor]

Hello guys and girls. I wonder if someone can help me with an issue I've come across on our in house MCD on v6 (12.0.0.49). I have been testing a Mitel 5624 wifi handset and it is registered on the system and I have given it a COR group number which allows it to dial out on just about anything (same number as my office ext) however it won't dial out. It must be a setting in the system as I have also connected a SIP client on my iPhone as a different extension and I get the same problem? Can anyone point me in the right direction?

[x-man]

can you ring in to it? is this through your normal trunks? can you dial internally?

[JasonTaylor]

Yes internal calls are fine both ways

[x-man]

Have you given it a SIP COS?

[marcolive]

Double check you have "PSTN access via DPNSS" enabled in your class of service.