MFJ Multi-mode Data Controller MFJ-1278B User Manual

MFJ-1278B MULTI-MODE ADVANCED OPERATION
K## Allows you kill the message in slot nn, where nn is a particular slot number. Remote
users may only kill messages that are addressed only to them or originated by them.
The local and remote SYSOP can kill any messages, depending on the setting of the
new command REMsysop. Please refer to the REMsysop for more detailed
information.
L This command allows the remote user, local or remote SYSOP to list all messages in
the mailbox. All of slots which are currently in use will be listed. They all will have
the slot number, flag field, the destination callsign, originator callsign, subject field.
Also the Mailbox command line will be on the next line.
M This allows the remote user, local or remote SYSOP to change memory banks in the
mailbox ram. The current memory bank is indicated on the mailbox command line.
The bank will be inside a pair of{}, which will be after the "bytes free" indicator.
Below is an example of a typical command line from the mailbox:
nn free {n} Mailbox (B,E,H(elp),J,K,L,M,R,S,T) >
Where {n} is the bank number. The bank number will vary from 0 to 7 depending on the
size of the expanded memory ram. The bank numbers in relation to the RAM size are as
follows:
MEMORY SIZE NUMBER OF BANKS
32K 0
128K 0 or 1
512K 0 thru 7
NOTE: There will be only one (1) number in the { } at anytime.
For example let's say that you are running a 128K mailbox, and a remote user wants to access
memory bank #1. First a connection to your mailbox must be made. Once the Mailbox
command line is obtained the user will type:
M 0 <CR>
This will be received by your Mailbox and then your Mailbox will send back a new Mailbox
command line:
nn free {0} Mailbox (B, E, H(elp), J, K, L, M, R, S, T)>
Thus the {0}indicates the memory bank has been switched to bank #1.

MFJ Multi-mode Data Controller MFJ-1278B Specifications

General

Type	Multi-mode Data Controller
Model	MFJ-1278B
Interface	RS-232
Power Supply	12 VDC
Modes Supported	Packet, RTTY, ASCII, CW
Frequency Range	HF/VHF
Connectors	DB-9

Summary

INTRODUCTION

COMPUTER INTERFACING

Details connecting the MFJ-1278B to computers via serial or TTL ports.

TERMINAL SOFTWARE REQUIREMENTS

Specifies software requirements for enabling the computer to act as an ASCII terminal.

RADIO INTERFACING

Explains how to connect the MFJ-1278B to radios for operation.

BASIC OPERATION

OPERATIONAL MODES

Guides on changing operating modes using the MODE command and understanding mode codes.

PACKET OPERATION

Covers basic VHF packet operation, including connect/disconnect exercises and digipeating.

PACTOR

Introduces PACTOR operation, its features, and mailbox functionality.

ADVANCED OPERATION

SPECIAL CHARACTERS

Discusses special characters for input editing, flow control, and customizing MFJ-1278B functions.

PACKET OPERATING MODES

Explains Command, Converse, and Transparent modes for packet operations.

Commands Affecting Protocol

Details commands that influence the AX.25 packet protocol operation.

HARDWARE

MFJ-1278B SPECIFICATIONS

Lists the technical specifications of the MFJ-1278B hardware.

RS-232C HANDSHAKING PROTOCOL

Details the hardware handshaking protocol for the RS-232C port.

JUMPER FUNCTIONS

Lists the function and location of various jumpers on the MFJ-1278B mother board.

TROUBLESHOOTING

GENERAL TESTS

Provides basic tests and initial checks for diagnosing MFJ-1278B problems.

SPECIFIC SYMPTOMS

Lists common symptoms and guides for resolving MFJ-1278B issues.