Hi there - I have a 4xi which I'd like to install between a legacy Siemens ISDN PBX and the outside world, using ISDN port 3 to communicate with the Siemens. I believe I should set the Port 3 ISDN Interface Type to Network, but this option does not appear in the drop-down box. (Only User is available).

Is this a restriction on the 4xi ? All the documentation seems to indicate that this configuration should be accessible. Is it possible to bypass this issue by uploading a legible config ? If so, what is the required entry against the mpinterfaceType= field ?