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TN211-9.DOC
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1993-08-09
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TN211-9.DOC
SYSOP COMMAND LIST
**********************
Besides the USER command listing, there are a special set of commands for
SYSOP use. To be able to use these, one must be recognized by the node as a
SYSOP. The method for doing this is to answer correctly the random set of
numbers given in response to a (S)YSOP command as described previously.
INFO (I) - Allows the SYSOP to enter text into the soft coded INFO section
on the node. The INFO section has available a maximum of 160 characters. Up
to 80 characters per line are allowed. To use, type: "I (space) text
<enter>" for the first line. If one prefers NOT having text appear on the
first line, then type "I (space) (Control G) <return>." This gives a "beep"
along with a blank first line. For text to be entered on the 2nd and
subsequent lines, type: "I (space) + <text> <return>" until the total 160
character limit is reached.
An example for setting INFO:
SYSOP action: I (control G) <return>
Node response: SVATST:NJ7P-4}
SYSOP action: I +Sierra Vista, AZ
Node response: SVATST:NJ7P-4}
Sierra Vista, AZ
SYSOP action: I +145.01 MHz
Node response: SVATST:NJ7P-4}
Sierra Vista, AZ
145.01 MHz
SYSOP action: I +CARA elections coming up soon, be prepared to help!
Node response: SVATST:NJ7P-4}
Sierra Vista, AZ
145.01 MHz
CARA elections coming up soon, be prepared to help!
SYSOP action: I +BISBEE node will soon QSY to 145.11 MHz.
Node response: SVATST:NJ7P-4}
Sierra Vista, AZ
145.01 MHz
CARA elections coming up soon, be prepared to help!
BISBEE node will soon QSY to 145.11 MHz.
This process can be repeated until the maximum of 160 characters, including
non-typing and punctuation, has been reached. To erase the entire INFO
section, just type: "I <Control G>." If the INFO section is frequently to be
changed, an INFO file could be prepared in advance with the appropriate
commands and text included. After SYSOPing the node, the file can be uploaded.
Another advantage of preparing the file in advance is it doesn't require as
much on-the-air time.
While 160 characters are available, good network management practice
dictates only enough text is used to get the message across. Although it may
seem "distinctive" to fill the remainder with spaces, line feeds, or Control
G's, please don't do it. Users find such practices annoying plus it
unnecessarily congests the network.
Examples of INFO text and format are:
WTEX:W5CDM-3}
Located at Notrees, Tx. Ant 600 ft. courtesy of WD5THB & W5CDM...
RDG:WA6YNG-1> From 18 Miles West of Redding
On Shasta Bally at 6200 Ft. - 145.05 Mhz.
With a Motorola Micor 60 watt radio on battery and float supply.
YKA:VE7RKA>
Greenstone Mountain Packet System
Kamloops, B.C.
SysOps- VE7EHL - VE7EJE
Mark your calendars, Nov 22, Packet meeting at the Lotus, C U There...
KEY TONE (K T) - Operates the PTT line of the TNC and turns on the Mark
(low) tone or the Space (high) tone for approximately 22 seconds.
KEY DIDDLE (K D) - Operates the PTT line of the TNC and alternates rapidly
between Mark and Space for approximately 22 seconds.
The purpose of the "KEY" commands are to make the NodeOp's job of setting
deviation and RF frequency much easier. Previously it was necessary to
reinstall the original TNC firmware chip and perform the CALIBRA procedure to
set FM deviation. Now, if the NodeOp has appropriate equipment and is within
radio range of the node, he can routinely check frequency and deviation
remotely. At the site, this same procedure can be done via the HOST mode port.
Once entered, there is NO way the KEY command can be terminated until the
internal timer runs its course. If the TNC-2 watchdog timer is set for less
than a 22 second duration, the watchdog will unkey the PTT. However, the node
will continue the KEY command until the remaining time has expired. During
this period, the node will not execute any other commands.
Due to the nature of the SIO chip in the TNC-2, it's necessary it be
"toggled" to switch from high to the low tone, or vice versa. This was done
in the TAPR modem alignment procedure by tapping the space bar. Of course
this isn't feasible when remotely SYSOPing and some experimentation is required
if one wants to change tones. One way would be to perform a K T command and
if the tone is not the one desired, do a "CQ" and repeat the K T command.
Oftentimes one or more "CQs" will toggle to the opposite tone. This procedure
is also required in HOST SYSOP mode.
ON - OFF - A simplified remote control capability as compared with the HIGH
LOW commands found in TheNet version 1.0. "ON" turns on the CON LED and "OFF"
turns the LED off. In the MFJ 1270B, the voltage sense from the CON LED
appears on pin 8 of the DB-25 connector. The voltage sense also appears on the
base of Q16, a 2N3904, the output of which goes to pin 2 of the TTL connector.
The main caution here is that the controlled device not draw more than a few
milliamps either source or sink. In the MFJ-1270B, pin 2 (NOT-DCD) of the TTL
connector is low when ON and high when OFF.
A solid state SPST relay such as the Teledyne p/n 611-2 can switch up to
25 amps at 250 VAC. It requires a DC control of 3 - 28 volts. In the MFJ-
1270B, replace Q16 with a 2N3906. Replace R103 with a 220 ohm 1/4 watt
resistor. On the bottom of the board add a 470 ohm 1/4 watt resistor between
the base of Q16 and the ground tab of radio port connector J2. These changes
will source 4 volts at 4 milliamps through pin 2 of the TTL connector. The
input of the relay is connected between pin 2 (+) and pin 3 or 6 (-) on the J5
TTL connector. This satisfactorily switches the relay and provides correct
"sense" for the CON LED. It will glow when the relay is ON and be extinguished
when the relay is OFF. Other relay types may require a transistor buffer
between pin 2 and the controlled device. As with any higher voltage wiring
projects, be sure to comply with applicable electrical safety practices and
codes.
PARMS (P) - Allows the NodeOp to make changes, as necessary. To use, type
"P space parameter number space new value <enter>" to change any of the parms
to a new value. For example, to change parameter 14 from a "0" to a "1," type
"P 14 1" to effect the change. Parameters are numbered starting with "1,"
from left to right. Multiple parameter changes in one command are disallowed.
NOTE: The above is a new procedure with version 2.09/2.10.
LOCKING NODES - Occasionally a need may arise to modify node entries in the
NODES table. The SYSOP command for this is:
N [LOCKED NODECALLSIGN] + ALIAS QUALITY OBS PORT [LOCKED NODECALLSIGN]
For example: N K7WAA-1 + CAHTO 0 0 0 K7WAA-1
Assuming the path to neighbor node CAHTO is unreliable, good network
management practices would dictate CAHTO be locked out. In the above example,
setting the QUALITY to 0 will prevent CAHTO from appearing as a direct path.
Setting the Obsolescence count to 0 makes CAHTO be listed as a permanent locked
entry. If the Obs count was set to a value between 6 - 1, this locked entry
would then be deleted at a time as established between Parameters 4
(Obsolescence counter) and 6 (Broadcast interval).
To manually unlock CAHTO, the command is reversed:
N K7WAA-1 - CAHTO 0 0 0 K7WAA-1
Here one will note, the minus sign is used for this purpose. It is
essential the unlock command be the same as the lock command, with the
exception of the minus sign.
Setting the Obsolescence to zero permanently locks the destination node
into the nodes table. Even if the locked node fails, it will still be listed
in the nodes table. For this reason, the locked NODES procedure is not often
used as it's counterproductive network practice to broadcast failed nodes. It
should be noted this procedure only works with "Net" nodes capable of
generating valid Level 4 Transport Layer responses. If one attempts to connect
from the node to a locked TNC or a KA-node, one will initially see a connect
made. But when TheNet fails to receive a return Level 4 acknowledgement after
two or three interrogations, the circuit is disconnected.
The LOCKED NODES command to use if a node should NOT have an alias is:
N [LOCKED NODECALLSIGN] + * QUALITY OBS PORT [LOCKED NODECALLSIGN]
Usage example: N AK7Z-1 + * 143 0 0 AK7Z-1