I am trying to setup remote sip extention but it cant connect. On both ends I have simple ISP routers ZXV10 H201L on server side and ZXV10 W300 on client side. Server and phone are both behind NAT.
I tried to connect with hardphone and softphone, in both cases cant connect. With SIP client X-Lite I got error “Problem at server (sip error 408)”.
With setup I did:
- Added Sip extension and also put NAT Yes
- I configured Asterisk SIP settings
- I fowarded ports on router
I could upgrade routers or buy new router and phone with VPN client. But any help or idea to make this work with current setup?