Epson Multi-mode Data Controller MFJ-1278B - Manual (Page 234)

MFJ-1278B MULTI-MODE OPERATIONAL COMMANDS
LISTEN Mode: AMTOR Immediate Command
LISTEN is used to begin monitoring someone else's Mode A connection. You'll need to enter
LISTEN to tell the MFJ- 1278B to start synchronizing to the desired signal.
LISTENing to Mode A connections can be irritating if conditions are poor because there is
no error correction afforded to stations which are not active participants in the QSO. (also see
ERUS)
MAILbox ON/OFF
Mode: Pactor Default OFF
Parameters:
ON
Brings the Pactor Mailbox on-line.
OFF
Takes the Pactor mailbox off-line.
The MAILbox command activates the MFJ-1278B's Pactor Mailbox mode. The MAILbox
command works in conjunction with the Packet MAILBOX command. Both the Packet and
Pactor Mailbox commands need to be ON, for the Pactor mailbox to function.