705-561-0674 nera@nera.ca

491-204 Mine Dial/Page Phone

  • Date: 12 April 2018
  • Manufacturer: GAI-Tronics (a Hubbell Company)
  • Product Type: Dial / Page Phone


491-204 Mine Dial/Page Phone


  • Selective and All-Call Paging
  • Private Conversations
  • Place and Receive Calls
  • Each Station Allows Simultaneous, Independent Conversations On Each Phone
  • Emergency Page Function Is Automatically Enabled if Switchboard Is Out of Order, Or If Power Fails
  • Flashing Light Designed For Use In Noisy Areas Where A Ring Might Not Be Heard; Light Also Improves Ability To Locate Phone In Dark Areas
  • For Ease Of Installations, Each Interface Cabinet Supports Up To 80 Extensions.
  • 8-Hour Minimum Battery Backup


The GAI-Tronics Mine Dial/Page Phone system provides the convenience of a telephone station plus paging capabilities, in gaseous or dusty locations where standard telephone equipment is considered too hazardous. Mine Dial / Page Telephones are rated as “permissible” for use in coal mines by the Mine Safety and Health Administration (MSHA) of the United States Department of Labor (Approval 9B-221). The System is used in conjunction with a public or private branch exchange (PBX). Each station in the system is made up of three components; (1) the Mine Dial/Page Phone station mounted at the point where needed, (2) a GAI-Tronics interface card mounted outside the hazardous area and electrically connected between the station and the telephone exchange, and (3) an interface cabinet. The GAI-Tronics Interface Cabinet houses MSHA approved safety barriers, interface cards, electronic switching, power source, and all the equipment necessary to interface the Mine Dial/Page Phone with the customer’s plant telephone system.