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-SXport. 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

 

 

 

 

 

Modal Bandwidth @ 850 Nanometers with

 

Fiber Type

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

 

 

 

302401-D Rev 00

B-1

Page 241
Image 241
Nortel Networks 450 manual 1000BASE-SX Models, Table B-1 Operating Range for 1000BASE-SX