One way talk path from IP phone to the outside trunk

[phonetech1]

Hi All!
On my new IP phones I don't have a talk path from the IP phone to a loop start trunk. I have the incoming audio from the trunk, but no audio from the IP phone to the trunk.
Any suggestions on where I should start looking?

Thanks

 

[whosrdaddy]

phontech1, this is all related to the fact you're running older firmware, please try to solve all issues in this thread: thread806-1215255

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[TripleT]

Also check to ensure that you have the correct codec settings for both the phone and the MD110.

You need to ensure that the codec priority is the same at both ends.