User guide

Metrobility “redundant twister” 13
2731-XX 100BASE-TX connections:
• When connecting a “redundant twister” 2731 to another device that is
internally wired straight through, use a crossover cable.
• When connecting a “redundant twister” 2731 to a device that is internally
wired crossed over, use a straight through cable.
• If you do not know the internal wiring configuration of the other device’s
RJ-45 port, consult the product documentation.
• Refer to the diagrams titled “Straight/Crossover RJ-45 Twisted-pair
Cables” in the User Guide section of this manual for more detailed
information.
When making fiber optic connections, be sure that the transmit (TX)
optical conductor of the “redundant twister” connects to the receive (RX)
optical conductor of the connected device; and be sure that the transmit
(TX) optical conductor of the device connects to the receive (RX) optical
conductor of the “redundant twister” for both the PRIMARY and SEC-
ONDARY links.
TM
MAIN PWR
AT
LK
A
B
PRIMARY
AT
LK
SECONDARY
AT
TX RX TX RX
RESET
LKSW
“redundant twister” 2731
TM
100BASE-TX/FX
2711-11 10BASE-T connections:
Be sure to set the MDI-II/MDI-X switch appropriately for each port.
Once power is applied to the unit, use the Link (LK) LEDs on the front
panel to verify correct segment connectivity. The LK LED illuminates
provided there is an active device connected to the other end of the cable
sending idle link signals.