Hi,<br><br>So, if you dedicate PBX ports to serve as a trunk, you're likely to loose the abilty to forward DID calls : when a call for an Asterisk user comes into Panasonic PBX, it will be forwarded to Panasonic FXS trunk ports.
<br>Then, Asterisk should have no mean to decode to which extension, the call has to be forwarded, has it comes from an FXO port which won't carry any data such as CallerID.<br><br>I'm not 100% sure of that but that's the way analog ports works here, on some legacy PBX : analog port means no service.
<br><br>regards<br>