MFJ-1270C/1274C MANUAL ADVANCED OPERATION
Page 62
beacons are sent with the command BEACON. To transmit the beacon at 10-
second intervals, for example, give the command
cmd:BEACON EVERY 1
The beacon function also has a transmit-after mode, enabled by using the
keyword AFTER in place of EVERY, in which a beacon packet is only
transmitted after activity is heard on the channel. This feature might be used to
leave an announcement for other packet users. If someone transmits on an
otherwise idle channel, a beacon can be sent a short time later. No beacons are
sent in this mode if there is a lot of packet activity on the channel, since the
required period of quiet will not occur.
Unattended Operations
Individuals who want to leave their MFJ TNC on overnight can monitor packets
even with the terminal or computer off. Just type CTRL-S then turn the terminal
or computer off. The next morning turn the computer on, then type CTRL-Q.
The MFJ TNC will dump everything monitored during the night limited only by
the amount of available RAM.
The MFJ TNC can operate unattended for extended periods of time. If you
would like to have the MFJ TNC operate as a digipeater but not connect with a
station, be sure to set DIGIPEAT ON and CONOK OFF. This is probably
most useful when setting up a dedicated digipeater in a remote location.
Packet Formatting
The maximum length of a packet is determined by the command PACLEN. If
you type more than the maximum number of characters without entering a send-
packet character, the MFJ TNC will transmit a maximum-length packet. In
Transparent Mode, a packet will be sent if the maximum number of characters is
entered before the delay conditions set by PACTIME force a packet to be sent.
Some MFJ TNCs may not be able to accept packets longer than 128 characters.
If you have set the send-packet character to <CR>, you probably want the <CR>
to be included in the packet for display at the other end. If you set the send-
packet character to a special non-printing character, you probably want the
character to be treated as a command only. The command CR controls whether
the send-packet character is to be echoed and included in the packet.
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