3Com 3C13886 Installation Guide - Page 117

3Com Router Module Guide Chapter 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. 4.1.9 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 Attribute 100FX SM Description 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) Optical Min. transmitter power Max. -15 dBm -8 dBm -20 dBm -14 dBm Receiver Min. sensitivity Max. -31 dBm -8 dBm -31 dBm -14 dBm Operating mode Full duplex 100Mbps Supported frame format Ethernet_II Ethernet_SNAP 4-8