No, no, no, sorry, I was wrong. Line 1 13@192.168.1.13: 5060, Line 2 14@192.168.1.13: 5061. It is the same ip but different ports. The gateway rings itself.

I tried to call on the IP, e.g. line 1 is number 13@192.168.13:5060 and line 2 is number 14@192.168.1.14:5061. If I am calling from line 1 to 2 or line 2 to 1, I have a busy signal. Therefore, I am asking if there is any function like in Grandstream ...

spa122 how to make a connection between direct ports (FXS). Is it possible ? I need to establish a direct connection, no SIP server.