Instruction manual
MFJ-1289 Multicom User's Manual Page 56
Before you enter the FAX module set the correct channel, A or B, and Radio
Port.
If you only have one TNC and radio you will be set to the correct channel and
radio port. If you have more than one TNC set the channel with <Alt>+X. The
current channel will be in the dialog box on the terminal screen. Set the radio port
with the RAD 1 or RAD 2 command at the cmd: prompt.
The FAX directory set in the <F3> configuration menu should be set to a valid
directory.
Press <F4> to enter the FAX Module.