Situation; The client has Brother MFC. It can’t send fax and Comcast confirm the line is good.
Troubleshooting: 1. Make sure the telephone cable is 4 pins cable. 2 pins may not work.
2. make sure you connect to dedicate fax line.
3. Some Brother MFC may not work for Comcast service.
To test it, press Hook key. You should get dialing tone and the display show telephone. If you don’t hear the tone, check the cable.