RJ-45 pin list
Connect 4 wire data pairs
The analog voice-frequency data transmission supports constant transmission of 300Hz to 3400Hz.
Connect the TX pairs of the interfacing equipment to pins (3 & 6) of RLH fiber link and the RX pairs of the
interfacing equipment to pins (4 & 5) of RLH fiber link. The TX pairs on each unit of RLH fiber link
corresponds to the RX pair at the other end.
Connect E&M leads
Connect the E&M leads to the E&M INPUT and E&M OUTPUT RJ-45 pins as illustrated below. The
RECEIVE of one side corresponds to the SEND at the other end. The E&M input is activated by 24VDC,
and can accept up to 48VDC.
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E&M operational status may be determined from the 2 status LED’s located on the upper and lower ends
of the RJ-45 Socket. The upper LED is ON when the input is active, and OFF when no input is present.
The lower LED is ON when the E&M output is closed, and OFF when the output is open.
RJ-45 Pin Chart
E&M INPUT
1
Signal Battery, SB
2
M-Lead
4 WIRE RX (Ring)
3
Ring, Audio Input, R
4 WIRE TX (Ring)
4
Ring, Audio Output, R1
4 WIRE TX (Tip)
5
Tip, Audio Output, T1
4 WIRE RX (Tip)
6
Tip, Audio Input, T
E&M OUTPUT
7
E-Lead
8
Signal Ground, SG
RJ-45
1
8
6
3
3
4
5
6
Ring, Audio Input, R
Ring, Audio Output, R1
Tip, Audio Output, T1
Tip, Audio Input, T
RJ-45
Customer Equipment
RJ-45
RLH Fiber Link
35 OHMS
NO Relay
RJ-45
PINS
Contact
SEND INPUT
7
8
1
2
RECEIVE OUTPUT
SEND INPUT
RECEIVE OUTPUT
FIBERS
35 OHMS
NO Relay
RJ-45
PINS
Contact
7
8
1
2
RLH 4 Wire E&M
RLH 4 Wire E&M
RLH Industries, Inc. • Tel. 866-DO-FIBER • Fax 714 532-1885 • www.fiberopticlink.com
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