2–4 MULTILINK ML3000 ETHERNET COMMUNICATIONS SWITCH – INSTRUCTION MANUAL
PRODUCT DESCRIPTION CHAPTER 2: PRODUCT DESCRIPTION
2.2.2 Module A (100Mb) - four RJ45 ports (use in Slots 3-10)
The Module A four-port copper module provides four 10/100Mb switched RJ-45 ports. The
10/100Mb switched ports normally (as a default setting) are independently N-way auto-
negotiating and auto-crossover (MDIX) for operation at 10 or 100Mb speed in full- or half-
duplex mode. (i.e., each independently selects a mode and speed to match the device at
the other end of the twisted pair cable).
FIGURE 2–2: Module A, 100 Mb - four RJ45 ports
For auto-negotiation and MDIX details, see Section 4.1.6.
There are two LEDs per RJ-45 port on the module; one for Link/Activity and one for F/H
Duplex. For the Module A LED designations, see Section 2.2.1: ML3000 Module LED
designations.
A twisted pair cable must be connected into an RJ-45 port and the Link (L/A) indicator for
that port must be ON (indicating there is a powered-up device at the other end of the
cable) in order for the L/A LED to provide valid indications of operating conditions on that
port.
Using the Multilink ML3000 software, the user may disable auto-negotiation and fix the
desired operation of each RJ-45 port. The user may select 10Mb or 100Mb speed and full-
or half-duplex mode per-port as required.
A module similar to Module A is also available with IEEE 1588v2 Timing Synchronization as
Module P.
Note
For Power Substations: In support of the IEEE 1613 Class 2 standard, GCI advises that, for
substation applications, the RJ-45 ports are intended for connectivity to other
communication equipment such as routers or telecommunication multiplexers installed in
close proximity (i.e., less than 2 meters or 6.5 ft) to the 10KT. It is not recommended to use
these ports in substation applications to interface to field devices across distances which
could produce high (greater than 2500 V ) levels of ground potential rise (GPR) during line-
to-ground fault conditions. The 10KT passes the 1613 specifications for zero packet loss
with fiber ports and with RJ-45 ports used as indicated here.
2.2.3 Module G (100 Mb) - four Multimode LC (use in Slots 3-10)
The Module G four-port fiber module provides four 100Mb Multimode LC Fiber ports.
FIGURE 2–3: Module G, 100 Mb - four Multimode LC
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