Epson Multi-mode Data Controller MFJ-1278B - Manual (Page 178)

MFJ-1278B MULTI-MODE OPERATIONAL COMMANDS
ALTCALL ssss Mode: AMTOR Default: blank
Parameter:
ssss Designates a four letter SELCALL for use in Mode A Amtor The SELCALL used
in the ALTCALL command is the alternate SELCALL for Mode A Amtor
operations.
ALTCALL is used to set up an alternate SELCALL that the MFJ-1278B responds to in
mode A. Whether the MFJ-1278B uses this SELCALL or not, depends on the setting of the
AALT command.
ANSBSTR cccc
Mode: AMTOR Default: blank
ANSBSTR will enable the MFJ-1278B to respond to a "Who Are You?", WRU Mode A
AMTOR signal. The text cccc may be up to 15 characters.
When the MFJ-1278B hears a WRU request, it will respond with the text in the ANSBSTR
string.