It remains Solid, if I plug directly into the line with a phone should I be able to hear any chirps because I can't?
Things I've tried this morning with my friends fax machine. Below applies for both sending and receiving.
Connected directly without MCD - fail
Connected with MCD - fail
Connected through MCD and filter - fail
Connected through MCD - no dialtone
Connected directly - success
However I successfully sent a fax to a fax to email service, and received one back whilst on Line A.
But sending/receiving to a proper machine on Line A never works, Line B works just fine.
entanet Office MAX 15