Nortel Networks 450 - Manual (Page 241)

302401-D Rev 00 B-1
Appendix B
Gigabit Fiber Optical Characteristics
The Uplink/Expansion Module on the BayStack 450 switch supports
1000BASE-X (Gigabit Ethernet) MDAs. This appendix describes the optical
characteristics of the 1000BASE-X MDAs. See Appendix C, “Media Dependent
Adapters,” for more information about MDAs.
1000BASE-SX Models
The 450-1SX and 450-1SR MDAs provide 1000BASE-SX (850 nanometers, short
wavelength, Gigabit Ethernet) connectivity. The 450-1SX provides one
1000BASE-SX port. The 450-1SR provides one 1000BASE-SX port and one
LinkSafe redundant port.
Operating Range
Table B-1 lists the operating range for the 1000BASE-SX models:
Table B-1. Operating Range for 1000BASE-SX
Fiber Type
Modal Bandwidth @ 850 Nanometers with
Minimum Overfilled Launch (MHz · Km)
Minimum Range (Meters)
62.5 um MMF 160 2 to 220
62.5 um MMF 200 2 to 275
50 um MMF 400 2 to 500
50 um MMF 500 2 to 550
10 um MMF Not supported Not supported
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