The MRJ31XSCP-WP from Ditek Corp. is a device used for protecting fire or burglar alarm panel dialers that provide offsite monitoring. The unit, which is designed to be plug-and-play between a 31X short block and an alarm panel, provides over-voltage and current-limiting protection. The universal RJ jack accommodates both RJ31X and RJ38X plugs. Ditek Corp.

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