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The Keltron SDACT or FDACT provides two RJ-45 modular jacks for connection to two independent
telephone lines. The S/FDACT modular jacks are wired in 1-to-1 correspondence with the RJ31X
modular jacks. Connect the S/FDACT to the RJ31X jacks using the 1-to-1 modular patch cords supplied,
Keltron part number 63RJ4507. Plug one end of the modular cord into the S/FDACT RJ-45 jack. Plug the
other end into the RJ31X jack. For reference, proper wiring of the RJ31X jack is shown in the figure
below.
The S/FDACT is electrically isolated from the telephone lines so that a ground fault on a telephone line
does not fault the S/FDACT, and the S/FDACT complies with FCC requirements.
Each telephone line interface circuit of the S/FDACT is protected by positive temperature coefficient
(PTC) resistors and transient voltage suppression devices.
