Furuno FELCOM251, Installation Manual

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5. HARDWARE INTERFACES
5-4
5.4 Ground Stud
The Communication Unit has a ground stud with a hex head bolt. The ground stud is
located in the connector panel and is used for grounding the Communication Unit.
For information on how to ensure proper grounding of the Communication Unit, see
section 2.5.2 and chapter 4.
5.5 Analog Phone/Fax Interface
5.5.1 Overview
The Communication Unit has two RJ-11 ports, which can be used for connection of
analog phones or fax machines.
To use the optional telport extender, it can be extended to 4 ports.
5.5.2 Pinout
The Phone/Fax connectors are RJ-11, 6/4 female connec-
tors. The table and figure below show the connector outline
and pin assignments.
Phone connector pinout
Pin number Signal
1 NC
2 Tip (TEL3/TEL4)
3 Tip (TEL1/TEL2)
4 Ring (TEL1/TEL2)
5 Ring(TEL3/TEL4)
6 NC
Phone/Fax 1 Phone/Fax 2
1 2
RJ-11 female connector