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3Com Router 5000 and Router 6000 v2.41
Module Guide
Chapter 4 Flexible Interface Cards (Router 6000)
4-4
Note:
Depending on how light travels, optical fibers are divided into multi-mode optical fiber and single-mode
optical fiber.
Single-mode optical fiber has very thin core, and transmits only in single mode on a
given wavelength. It features wide band and large transmission capacity.
Multi-mode optical fiber allows transmission in multiple modes on a given wavelength.
In multi-mode, lights in different modes travel at different speeds, resulting in phase
distortion and thus limiting the transmission band. In terms of fiber core size, there
are two types of multi-mode optical fibers: 62.5 μm and 50 μm, the transmission
media accepted by the ISO/IEC 11801 standard.
4.2.2 Interface Attributes
The following table describes the interface attributes of the Router 1-Port 100FX MM
FIC/100FX SM FIC.
Table 4-3 Router 1-Port 100FX MM FIC/100FX SM FIC interface attributes
Description
Attribute
100FX SM 100FX MM
Connector SC
Number of connectors 1
Optical fiber mode Single-mode Multi-mode
Max. transmission segment 15 km (9.3 mi.) 2 km (1.2 mi.)
Central wavelength 1310nm (1261 to 1360nm) 1315nm (1270 to 1360 nm)
Min. -15 dBm -20 dBm Optical
transmitter
power
Max. -8 dBm -14 dBm
Min.
-31 dBm -31 dBm
Receiver
sensitivity
Max.
-8 dBm -14 dBm
Operating mode
Full duplex
100Mbps
Supported frame format
Ethernet_II