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4.4.5 Monitoring Other Stations<br />
Use the MONITOR parameter to determine what kinds of packets you will<br />
see when you are NOT connected to any another station.<br />
"MONITOR" takes a numerical value between "0" (zero) and "6." Each<br />
higher number adds more detail to your monitoring. As the value of<br />
the MONITOR setting is increased, additional functions are included in<br />
the monitoring sequences. The meanings of the MONITOR numbers are:<br />
0 Monitoring is disabled.<br />
1 Only unnumbered, "unconnected" frames are displayed. This<br />
setting will display Beacons, but not display connected stations.<br />
2 Numbered (I) frames are also displayed. Use this setting to<br />
monitor connected conversations in progress on the channel.<br />
3 Connect request ("C") frames and disconnect ("D") request packets<br />
in addition to the above are displayed.<br />
4 This is your <strong>PK</strong>-<strong>232</strong>'s default value. Unnumbered acknowledgment<br />
(UA) of connect and disconnect frames are also displayed with<br />
either the characters "UA" or "DM" and a header.<br />
5 Receiver Ready (RR), Receiver Not Ready (RN), Reject (RJ), and<br />
Frame Reject (FR) supervisory frames are also displayed.<br />
6 Poll/Final bit and sequence numbers for monitored frames are<br />
shown.<br />
Understanding all types of packet frames is not important to operate<br />
packet. Packet operators should however understand that there are<br />
many types of control frames that do not contain printable data.<br />
Your <strong>PK</strong>-<strong>232</strong> can display these frames, but most users only want to see<br />
frames with information. For this reason, the default of the MONITOR<br />
command (4) does not display all the packets that the <strong>PK</strong>-<strong>232</strong> hears.<br />
NOTE:<br />
If you will be leaving your <strong>PK</strong>-<strong>232</strong> on to accept connects<br />
from others while your computer is off, set MONITOR to 0<br />
(zero) and type a to hold the data.<br />
4.4.5.1 Monitoring the Packet Networking Switches<br />
There are other types of frames used by networking switches that the<br />
<strong>PK</strong>-<strong>232</strong> does not normally display. These frames can be seen with the<br />
MPROTO command. Turning the command MPROTO ON allows ALL AX.25 frames<br />
to be displayed. Some packets you might see with MPROTO ON will<br />
contain information that may interfere with the display on your<br />
terminal or computer causing it to look "funny". For this reason the<br />
MPROTO command default is OFF.<br />
4/91 4-15<br />
From The <strong>N3UJJ</strong>.COM Document Library
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