Chapter 5 Section - Buck Rogers K4ABT Handbook

Buck Rogers K4ABT
"2 N 1" Handbook
The Packet Radio by
; Packet Radio "The Basics" ; The X1J4 System Node Operator's (SNO) Handbook
Section 1 Section 2
Chapter 10 Section II
DUAL AND MULTI-FREQUENCY NODE OPERATION:
TheNET X1 supports such multi-frequency operation without the need for exotic multi-port digipeater hardware. A dual-
frequency node, for example, consists simply of a pair of standard TNC2s (with TheNET X1 in each) connected together
with a simple RS232 cable. Each TNC takes responsibility for handling traffic on a single frequency; cross-frequency
traffic is passed over the cable between TNCs at relatively high speed. (See installation instructions for wiring of the
interface cable below.)
This gateway interface cable enables node communications between two X-1J4 nodes, port to port. This configuration
allows the SNO to bridge from one frequency to another, or from one baud rate to another, OR BOTH.
Set the DIP switches to the same RS-232 port baud rate. The DIP switches are located at the rear of the MFJ-1270B and
MFJ-1270C TNC's.
Most applications at VHF have the 1200 baud node DIP switches 5 & 7 ON and all others OFF. On the 9600 baud
node/port set DIP switches 5 * 8 ON, all others OFF.
On the late model MFJ-1270"CQ" Turbo TNC's the RS-232 baud rate can be set at 19,200 baud. Be sure that both TNC's
have this capability, otherwise, use the RS232 port setting of 9600 baud.
; TheNET X1J4 System Node Operators Handbook __ Page 29
Section II