Port and Cable Assignments
11
Installation
Verify that all system components have been properly installed. If one or more
components appear to be malfunctioning (e.g., the power cord or network cabling),
test them in an alternate environment where you are sure that all the other
components are functioning properly.
Port and Cable Assignments
RJ-45 Port Description
RJ-45 station ports (all port) can be attached to any devices which use a standard
network interface (e.g., a workstation, server, bridge or router). RJ-45 daisy-chain
ports (all port) can be cascaded to a station port on similar networking devices (e.g.,
another switch or hub). Use unshielded twisted-pair (UTP) or shielded twisted-pair
(STP) cable for RJ-45 connections: 100-ohm Category 3, 4 or 5 cable for 10 Mbps
connections or 100-ohm Category 5 cable for 100 Mbps connections. Also be sure
that the length of any twisted-pair connection does not exceed 100 meters (328 feet).
Schematics for both straight and crossover twisted-pair cable are shown below
Module ordering information:
SMC-EZ108FMSC:100 BASE-FX multimode Module with SC connectors
SMC-EZ108FSSC: 100 BASE-FX singlemode Module with SC connectors
SMC-EZ108FMMT: 100 BASE-FX multimode Module with MT-RJ connectors
SMC-EZ108FSMT: 100 BASE-FX singlemode Module with MT-RJ connectors
SMC-EZ108FMVF: 100 BASE-FX multimode Module with VF-45 connectors
Pin
Assignment
(Station Ports)
Assignment
(Daisy-Chain Port)
1
Input Receive Data +
Output Transmit
Data +
2
Input Receive Data -
Output Transmit
Data -
3
Output Transmit
Data +
Input Receive Data +
6
Output Transmit
Data -
Input Receive Data -
4,5,7,
8
Not Used
Not Used
Straight-Through
Crossover
(Switch) (Adapter)
(Switch) (Hub/Switch)
1 IRD+
1 OTD+ 1 IRD+
1 IRD+
2 IRD-
2 OTD- 2 IRD-
2 IRD-
3 OTD+
3 IRD+ 3 OTD+
3 OTD+
6 OTD-
6 IRD- 6 OTD-
6 OTD-
