Table 22 Controller Modem Troubleshooting - Honeywell UMC800 Installation And User Manual

Modem troubleshooting
Controller modem problems will typically show one of two symptoms.
The modem does not answer, or
the modem answers but does not establish communications.
Modem not powered.
Modem not configured for auto answer.
Modem not properly connected to phone line.
Bad cable connecting modem to phone line.
Controller not powered.
Modem set to wrong baud rate.
Modem configuration does not match specification.
Modem does not have non volatile memory.
Bad cable between modem and controller.
Wrong cable between modem and controller.
Controller failure.
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Table 22 Controller modem troubleshooting

Modem does not answer
Cause
Modem answers but does not establish communications
Cause
UMC800 Controller Installation and User Guide
Diagnostics and Troubleshooting
Fault Detection and Troubleclearing
Solution
Apply power.
Check modem configuration and correct.
Verify phone line is correctly inserted in modem
port and wall jack.
Replace cable with known good cable.
Solution
Apply power.
Follow procedure to set modem to 9600 baud.
Follow procedure to configure modem. See
Remote Access (page 44).
Replace modem with one of the recommended
types. See Remote Access (page 44).
Replace with a known good cable.
Replace with correct cable (not a null modem
cable).
Contact Honeywell service.
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