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MULTILINK ETHERNET COMMUNICATIONS SWITCH – QUICKSTART GUIDE 21
6.3 Connecting SC-type Fiber Optics (snap-in)
The following procedure applies to installations using modules with SC-type fiber
connectors. These include the A3, A7, A8, G3, G4, G5, G7, G8, GC, GF, GH, and GJ modules.
When connecting fiber media to SC connectors, simply snap on the two square male
connectors into the SC female jacks of the module until it clicks and secures.
6.4 Connecting Single-mode Fiber Optics
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 versus 50/125 or 62.5/125 microns for multi-mode, where xx/xx
represent the core diameters and the core plus cladding, respectively). Single-mode fiber
allows full bandwidth at longer distances and may be used to connect 10 Mb nodes up to
The same connection procedures for multi-mode fiber apply to single-mode fiber
6.5 Connecting RJ45 Twisted Pair
The RJ45 ports of the Unit can be connected to the following two media types: 100Base-TX
and 10Base-T. CAT Five cables should be used when making 100Base-TX connections.
When the ports are used as 10Base-T ports, CAT.3 may be used. In either case, the
maximum distance for unshielded twisted pair cabling is 100 m (328 ft.).
It is recommended that high quality CAT. 5 cables (which work with 10 Mb and 100 Mb) be
used whenever possible to provide flexibility in a mixed-speed network, as dual-speed
ports are auto-sensing for 10 and 100 Mb/s.
The following procedure describes how to connect a 10Base-T or 100Base-TX twisted pair
segment to the RJ45 port. The procedure is the same for both unshielded and shielded
twisted pair cables.
Z Using standard twisted pair media, insert either end of the cable with
an RJ45 plug into the RJ45 connector of the port.
Even though the connector is shielded, either unshielded or shielded
cables may be used.
Z Connect the other end of the cable to the corresponding device.
Z Use the LINK LED to ensure connectivity by noting that the LED will
be illuminated when the unit is powered and connection is
The Unit RJ45 Gigabit ports can be connected to 1000Base-T, CAT.5E (or better), 100 Ω UTP,
or shielded twisted-pair (STP) balanced cable media. The CAT.5E or shielded twisted pair
(STP) balanced cable is recommended when making 1000Base-TX connections. In either
case, the maximum distance for unshielded twisted pair cabling is 100 m (328 ft.).
It is recommended that high quality CAT. 5E cables (which work at both 100 and 1000 Mb)
be used whenever possible to provide flexibility in a mixed-speed network.