MFJ-1270C/1274C MANUAL ADVANCED OPERATION
Page 52
Packet Operating Modes
In Chapter 4 we discussed two of the packet operation modes, Command Mode
and Converse Mode. Packet also can operate in the third mode, Transparent
Mode which is a data-transfer mode like Converse Mode but is intended
primarily for computer data interchange rather than human conversation. We
describe all three of these modes below.
Command Mode
Command Mode is used to enter commands which alter the MFJ TNC's
operating parameters. The other modes are entered from Command Mode.
When the MFJ TNC is in Command Mode, the Command Mode prompt,
cmd:
is printed at the beginning of each input line. Note, however, that if the MFJ
TNC has received and displayed packets, the prompt may have scrolled off the
screen.
The MFJ TNC will be in Command Mode after a reset or power-up. After a
power-off, power-on sequence, all operating parameters of the MFJ TNC are re-
initialized to the parameter stored in battery backed-up RAM (bbRAM) by the
resident software. After the RESET command is issued all
operating parameters
are reset to the default values stored in EPROM. The values of most parameters
are stored in a permanent but easily changed form in the bbRAM memory.
The following commands set special characters which are active in Command
Mode. Refer to the discussions of these commands in Chapter 6 for details on
the operation of the characters in Command Mode. Also see the section on
special input characters in Chapter 4.
CANLINE Cancel current line
CANPAC Cancel output (Command Mode function only)
DELETE Character deletion
PASS Insert following special character
REDISPLA Re-display current line
START, STOP User's flow control characters (sent to MFJ TNC)
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