3–4
MULTILINK ML810 MANAGED EDGE SWITCH – INSTRUCTION MANUAL
CONNECTING ETHERNET MEDIA
CHAPTER 3: INSTALLATION
NOTE
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 6.5ft) to the ML810. It is not recommended to use
these ports in substation applications to interface to field devices across distances which
could produce high (greater than 2500V ) levels of ground potential rise (GPR) during line-
to-ground fault conditions. The ML810 passes the 1613specifications for zero packet loss
with fiber ports & with RJ-45 ports used as indicated here.
3.2.2
Connecting Twisted Pair (CAT5e or better, UTP or STP)
The RJ-45 Gigabit ports of the Multilink ML810 can be connected to the media types,
1000BASE-T or CAT 5E or better 100-ohm UTP or shielded twisted pair (STP) balanced cable.
The CAT 5E or better 100-ohm UTP or shielded twisted pair (STP) balanced cable is
recommended to use when making 1000BASE-TX connections. In either case, the max
distance for unshielded twisted pair cabling is 100 meters (328 ft).
The following procedure describes how to connect a 1000BASE-T twisted pair segment to
the RJ-45 port. The procedure is the same for both unshielded and shielded twisted pair
cables.
1.
1000BASE-T connections require that all four pairs or wires be connected. Insert
either end of the cable with an RJ-45 plug into the RJ-45 connector of the port. Note
that, even though the connector is shielded, either unshielded or shielded cables and
wiring may be used.
2.
Connect the other end of the cable to the corresponding device.
3.
Use the LINK LED to ensure proper connectivity by noting that the LED will be
illuminated when the unit is powered and proper connection is established.
3.2.3
Connecting Single-Mode Fiber Optic
When using single-mode fiber cable, be sure to use single-mode fiber port connectors.
Single-mode fiber cable has a smaller diameter than multi-mode fiber cable (9/125
microns for single-mode, 50/125 or 62.5/125 microns for multi-mode where xx/xx are the
diameters of the core and the core plus the cladding respectively). Single-mode fiber
allows full bandwidth at longer distances, about 70km with the single-mode LC.
3.2.4
Gigabit SFP (Small Form-factor Pluggable) Transceivers
The small form-factor pluggable (SFP) is a compact optical transceiver used in optical
communications for both telecommunication and data communications applications. Due
to its compact, hot pluggable characteristics, SFPs are becoming a very popular choice for
various applications. The small-chassis Multilink ML810 is designed for industry-standard
Gb-SFPs for user selection of the SFP gigabit media type as desired.
All SFPs used in Multilink ML810s are compliant with the industry standard Multi-Source
Agreement (MSA) ensuring compatibility with a wide range of networking kit. (See
Section
1.2
for the SFP’s available for the ML810.)
CAUTION
It is highly recommended to remove the fiber cable first before removing the SFP
transceiver for any reason. Not removing the fiber cable first can damage the fiber cable,
cable connector or optical interfaces. It is advised not to remove and insert a SFP
transceiver frequently as this may shorten its useful life.
