HELLO…
We need some help here, please
We usually install and configure asterisk PBX for some of ours customers, and never had problems.
Always we make an installation PBX central with trunk to VoIP TELECOM ENTERPRISE. That’s the way we know. Now a new customer want us to install a central we a trunk to a PSTN line, via ISDN line.
Some help please, we’ll appreciate a lot because we are not getting it done