Hello. I have Asterisk 1.8.18 which connects to ISDN PRI. All phones are sip, Aastra 6757i. Everything works as expected. We also have a fax machine. We need to be able to use that FAX machine to send or receive faxes. We are planning to have a dedicated did for faxes. Before, FAX machine was connected directly to pots line.
Any digestions how to accomplish it?