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World of Ham Radio 1997
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1997-02-01
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INFO BULLETIN
TNC MONITORING CAPABILITIES
BID: INFOTNC.004
There are several commands in your TNC that will vary your monitoring
capabilities. Listed below is a list and explanation of each of these
commands. Set them to suit your particular needs.
MONITOR - This must be ON for you to monitor anything. When ON,
you see packets from other stations on the frequency you're tuned
to. What packets you see is determined by other commands from the
list below. If MONITOR is OFF, you see only packets sent to you
while you're connected to another station.
On some TNCs, such as the PK⌐232, MONITOR can be set to various
parameter values:
M 0 - All monitoring is disabled. (Same as MONITOR OFF.)
M 1 - Only UNPROTO frames are monitored.
M 2 - Adds monitoring of stations connected to another station.
M 3 - Adds monitoring of connect and disconnect frames.
M 4 - (Default setting ⌐ same as MONITOR ON on most other TNCS.)
Adds monitoring of acknowledgement and busy frames.
M 5 - Adds monitoring of Receive Ready (RR), Receive Not Ready (RNR),
Reject (RJ) and Frame Reject (FRMR).
M 6 - Adds monitoring of Poll/Final bit and sequence numbers.
MALL - If MALL is ON, you receive packets from stations that are
connected to other stations, as well as packets sent in unproto
(unconnected) mode. This should be ON for "reading the mail".
If MALL is OFF, you receive only packets sent in unproto mode by
other stations.
MCOM - If ON, you see connect <C>, disconnect <D>, acknowledge
<UA> and busy <DM> frames in addition to information packets. If
OFF, only information packets are seen.
MCON - If ON, you see packets from other stations while you're
connected to someone else. This can get very confusing, but is
useful when your path is bad and you want to see if your packets
are being digipeated okay. If OFF, the monitoring of other stations
is stopped when you're connected to another station.
MRPT - If ON, you see a display of all the stations used as
digipeaters along with the station originating the packet and the
destination station. If OFF, you see only the originating and
destination stations. For example, if you have MRPT ON, you might
see a transmission such as this:
K9AT>WB6QVU,W6PW-5*: I'll be leaving for the meeting at about 7:30.
If MRPT was OFF, the same transmission would look like this:
K9AT>WB6QVU: I'll be leaving for the meeting at about 7:30.
In the first case, you can see that the W6PW-5 digipeater was being
used. The asterick indicates which station you were hearing the
packet from. In the second case you have no idea if digipeaters are
being used or what station you were receiving.
HEADERLN - If you have this turned ON, the header of each packet is
printed on a separate line from the text. If OFF, both the header
and packet text are printed on the same line.
MSTAMP - Monitored packets have the date and the time the packet
was received if MSTAMP is ON. If it's OFF, the date/time stamp is
not shown.
I run my station with all of these commands, except MCON, turned ON
so that I can really see what's happening on the frequency I'm
monitoring. Try various combinations of these commands and then
decide on the combination you like best for your station.
73, Larry, WB9LOZ @ W6PW.#NOCAL.CA.USA.NA