Worth Data 7100 RF Terminal Series Owner's Manual page 81

Make a cable with 5-5, 6-6, 2-2, and 3-3 (a straight cable); but, be careful that you select wires so that the 2 wire is in the twisted
pair with the 3 wire, and the 5 wire is in the twisted pair with the 6 wire. Do not use pre-terminated Ethernet cables since the
pairing is different.
For all RJ Cable pin numbers, number from left to right with the metal pin side of the connector facing you and the cable running to the
down position
Relay Test Plan and Failures
Relay Station failures are often cable-related. If a Terminal puts out a "Who Can Hear Me?" message and a Relay that is for some
reason not connected to the Base Station (bad cable, cut cable, broken connectors) hears it, it answers with the message:
Relay n Cannot Be
Heard by the Base
Notify Supervisor
Press Any Key
At this point, it is up to the operator to notify someone that the Relay is not communicating with the Base and to check the cabling
first. There is no message sent to the host, so it is very important that the operator that receives this message notify someone im-
mediately.
Because relay cabling is often troublesome, we supply a test cable for isolating the user-made cable from the process. This test
cable is so short that it doesn't follow the rules of twists on the previous page – it is just a Ethernet patch cable for node, but ade-
quate for testing the relay.
HINT: Use the suggested wire type, and if you're doing your own crimping, be sure to use the expensive metal crimpers ($100) and not
the cheap plastic crimpers ($15). Get someone familiar with making network (Ethernet) cables, but be sure to tell them not to use the
Ethernet pin outs for the Relay Stations, (it has been tried more than once!).
Testing the Relay
To test communication with a Relay, first check out the radio by doing a Site Test on the offending Relay with all other Relays
and Bases OFF. To check if a Relay is working with a Base Station, set the Base to a different channel than the Relay and set the
Terminal channel to match the Relay channel. Then cable-connect the Relay to the Base ("Relay" port to "Relay" port).
Start your application on the host or use one of our demo programs provided with the Terminal (it's a good way to test) - it takes
10 or more seconds for the Terminal to switch to the Relay. The delay is a result of the Terminal having to put out a "who can
hear me" message when it doesn't get a response from the Base Station. The Relay responds to the Terminals "who can hear me"
message and communication is established through the Relay. You will notice slightly slower throughput when working through
the Relay.
Relay ID and Channel...
Relays should be set to the same channel as the Base station and RF Terminals that you will be using in your system. Determining the
current channel is the same as on the Base station; power up the Relay and count the number of times the LED flashes (channel +
3). The default setting is channel 0 (3 flashes). Each Relay also requires a unique Relay ID; the default ID is 0. A Relay will blink
yellow; a Base blinks green.
Changing a Relay back to a Base
You can convert the Relay back to a Base Station by setting the Base/Relay jumper to the Base position. You can check the out-
come by simply powering up the unit - a Base blinks green; a Relay blinks yellow.
Changing the Channel on a Relay
The Relay must have their channel set to the same channel as the RF Terminals in their network. The channel is set on a Relay by
turning a rotary switch to the setting 0-5. Use a very small flat head screwdriver to turn the switch to the desired number.
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