DSC Internet and HSPA Dual-Path Alarm Communicator (TL255): Overview & Documentation

Overview

DSC Internet and HSPA Dual-Path Alarm Communicator (TL255) is listed here in the communicators category. For details, start with the manufacturer's own information.

Official information

Related troubleshooting guides

Alarm communication failure (FC, Comm Fail, trouble 4): causes and fixes Why an alarm panel reports a communication failure, from cancelled landlines and VoIP to retired 3G cellular radios, and what to ask your monitoring company.
What happens to your alarm system in a power outage How long an alarm runs on its backup battery, whether it can still reach the monitoring company, why it beeps when the power returns, and what to check afterwards.

Need more help with this model?

We have not published model-specific troubleshooting for the DSC Internet and HSPA Dual-Path Alarm Communicator (TL255) yet. The manufacturer's installation and user manuals are the most reliable source for wiring, programming, and trouble codes.

Open the manufacturer manual

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