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Installation 25
Figure 2-4 specifies the fiber types, bandwidth requirements, and length
constraints for the Gigabit Ethernet long-wavelength fiber interface on the
fiber optic media module.
Table 2-4. 1000Base-LX Fiber Specifications
10Base-T/100Base-TX Ports
The 10Base-T/100Base-TX ports use RJ-45 connectors. Figure 2-5
shows an RJ-45 connector being inserted into a port.
Figure 2-5. Inserting an RJ-45 Connector into a Port
The ports on the base unit are wired with the MDI-X function
implemented. These ports interface to UTP cabling for connection to
10Base-T or 100Base-TX network segments or end-stations. These UTP
connections meet the requirements of ISO 8877, specified by 10Base-T,
Section 14 of the IEEE 802.3 specification. Workstations or servers can
be connected to these ports using standard straight-through wired cables.
For connections to other switches or hubs, use an MDI port on the other
device. If an MDI port is not available, a crossover cable may be
necessary (refer to “MDI/MDI-X Crossover Cable Wiring” in Appendix A).
See Table A-2, “10Base-T/100Base-TX Pinouts,” for 10Base-T/
100Base-TX connector pin assignments.
Fiber Diameter
(microns)
Modal Bandwidth @ 1300 nm Range
62.5 µm MMF 500 MHz/km 2-550 Meters
50 µm MMF 500 MHz/km 2-550 Meters
50 µm MMF 400 MHz/km 2-550 Meters
10 µm SMF N/A 2-5000 Meters
ELS100-48tx2m.book Page 25 Thursday, November 16, 2000 4:59 PM