I have a customer who has a Mitel 5000 PBX in one office and Adtran phone in another. I am trying to connect the Adtran IP712 SIP phone to the Mitel PBX with no luck. Can anyone tell me if the IP712 phones are capable of working on other PBX's and specifically a Mitel 5000?
Steve, technically speaking if you are trying to integrate the IP700 series phones with a SIP compliant PBX, they should work, however they are only officially supported in the context of registering to a Netvanta 7100 or Netvanta UC Server. Thanks