Wired as it may sound, Panasonic NCP SIP extensions does not support NAT, I order to use theses extensuon on my IPhone I have installed FreePBX as a SIP gateway (and I appriciate the other options…).
I have the extensions up and running but I am struugleing with the trunks. Both PBX’s are on the same LAN the Panasonic as 10.0.0.240 and the FreePBX at 10.0.0.241
tset sip extension on the Panasonic is 170 and the password is test
I use the following settings :
Outgoing
trunk name 2000
Peer Details:
host=10.0.0.240
username=170
secret=test
type=peer
outgoing
user context 170
host=10.0.0.240
username=170
secret=test
NCP wll support any SIP end port. And yes can run it behind NAT.
On the Iphone you have a free trial to Xten SIP client. Connect to the office WiFI with your Iphone. Get the SIP phone working. Then build a VPN connection to the office and the softphone will work.
Or you need to open ports 5060 16000-16600 to the MPR IP address. You also have to SNAT the IP addres for the DSP so you get your RTP packets back to the PBX
You will need to disable the card and put the WAN IP address for NAT.
I have it working both way and I have my asterisk connected to my Panasonic using a PRI card and Qsig.