Troubleshooting - Black Box RJ-11 Manual

RJ-11 DATA BROADCAST UNIT

5. Troubleshooting

The most effective way to troubleshoot a system using the RJ-11 Data Broadcast
Unit is to bypass the Unit completely and connect one of the slave devices
(such as a terminal) directly to the source equipment (computer port, modem, or
concentrator). If the problem is corrected with the RJ-11 Data Broadcast Unit out
of the circuit, inspect the unit closely for loose connections. If the unit is defective,
you need to return the unit to Black Box for repair or replacement. Call Technical
Support at 724-746-5500 for a return authorization number.
If you have a loopback connector and an asynchronous data tester, you can
check the Data Broadcast for the common problems described in Table 5-1.
Connect the data tester to the composite channel and connect the loopback
connector, in turn, to each of the slave channels. You can verify proper operation
of the Data Broadcast by typing a few characters on the keyboard of the PC and
watching them appear correctly on the CRT screen. The terminal must be in
full-duplex mode for this test. The error counter on the data tester should verify
correct operation by displaying zero errors.
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