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; Packet Radio "The Basics"
Section 1
After the initial 24 hours has passed, I pull an Mheard listing and read the numbers of consective received repeat numbers.
Any number that is 2 or above, I set in the node using the "routes lock" technique as shown in the example below:
R 0 [neighbor node] + [route quality]
The syntax of the ROUTES command is as follows:
•
Route, Port, Callsign, + Quality
•
Route = command
•
Port = port number (0=radio & 1=RS-232)
•
Callsign = Neighbornode Call/SSID
•
+ = plus sign
•
Pathquality = 192 for LAN nodes or 224 for backbone nodes
Because I know that a very good route exists between node EVA:WB4EDZ-7 and node 1200:K4ABT-8, I lock the route
between EVA and 1200 in the follwoing manner;
R 0 K4ABT-8 + 192
As a rule, I don't lock a route to a node that has a receive repeat number in the Mheard list below 6 unless that node route is
the only route in the table, or all the Mheard list show low receive repeat numbers for all the nodes shown. Even then I try
to use a common sense approach and note the proximity and connectivity of the nodes that I lock in.
When determining which node is truly a neighbor node, use a common sense approach. By this I mean; Look at the
number of times the neighbor node is shown in the Mheard list, and try to make the determination at a time of day when
propagation is low. I find this time to be between the hours of 2:30 PM and 5:00 PM eastern time.
1)
Pick your real neighbor nodes from the routes table and lock them in at the recommended default quality
(192 for 2m, 224 for backbones.)
2)
Where there is a "gateway" (2 nodes via RS-232) neighbor node lock these routes at 255. If you
are locking 3 nodes in a node stack (via RS-232 using a diode matrix), set each of the locked
routes at 245. When locking 4 nodes in a node stack, set each nodes route at 235. With 5 nodes,
set (lock) their routes at 225. DO NOT LOCK ANY NODES IN A NODE STACK BELOW 225.
Remember that 224 is the locked route quality for neighbor "backbone" nodes.
3)
Reduce Parameter 3 (Default radio link quality given to new nodes) to a value equal to
Parameter 2 (Minimum quality to accept.)
NOTE: When locking RS-232 routes remember to use the 232 port number 1 (one) instead of the radio port number 0
(zero). Example:
Here is how it works. Your real neighbors have the full quality value that you have assigned to them. Nothing changes
there, but by reducing parameter 3 to the same level as parameter 2, new nodes that are heard are given a quality on the
threshold of acceptance. This means that the new nodes in the broadcast will have their name and callsign entered into the
node table, but all its related node path information will have qualities too low to be shown or used. Only the node itself
will be allowed into the node table and nodes associated with the routing. Because the node is at the point of quality
acceptance, it won't expand to other nodes because its quality is degraded to a point that will fall below the minimum
quality of neighbor nodes.
ILLUSTRATION SECTION Charts & Node Drawings TheNET
"2 N 1" Handbook
The Packet Radio
Section 2
R "1" K4ABT-2 + 255
Buck Rogers K4ABT
by
; The X1J4 System Node Operator's (SNO) Handbook
X1J4 System Node Operators Handbook __ Page 47
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