Technical data

Tech Note: Configuring a Modem for an ADR
Copyright © 2012 Peek Traffic Corporation. All rights reserved.
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Troubleshooting the Modem Setup
After you've installed the modem on the ADR, you should test the connection between your central software and the
ADR. If you continue to have a problem, you may need to try a different configuration for your modem. Try editing the
modem file and configuring the modem again, and then retest. Once you find a successful set of modem parameters for a
particular brand and model of modem, it should work repeatedly. Once again, this is the best reason to standardize on a
single type of modem for your ADRs.
Some of the following issues may also affect the consistency of your connections:
• Bad or noisy phone lines
• Bad or intermittent lightning protection on the phone line
• Dirty contacts on the phone line connections
• Non-environmentally rugged modems used in the field
• Improper power to the modem
• Modem configured at the wrong baud rate (should be configured at the same baud rate as the ADR)
• Some old-style analog telephone switches may contribute to noisy phone lines