I have a 4 fxo card, the 1st 2 ports have PSTN lines and the next 2 intercom lines from a Panasonic EPABX.
If i connect PSTN lines all inbound works but if i have 2 PSTN and 2 Intercom then only the PSTN incoming works, the other 2 dont.
Asterisk -rvvvvv shows call coming.
The ring patern are different.
Help Please