![Nortel BayStack 450 Switch Using Manual Download Page 244](http://html.mh-extra.com/html/nortel/baystack-450-switch/baystack-450-switch_using-manual_1706885244.webp)
Using the BayStack 450 10/100/1000 Series Switch
B-4
302401-D Rev 00
1000BASE-LX Models
The 450-1LX and 450-1LR MDAs provide 1000BASE-LX (1300 nanometers,
long wavelength, Gigabit Ethernet) connectivity. The 450-1LX provides one
1000BASE-LX port. The 450-1LR provides one 1000BASE-LX port and one
LinkSafe redundant port.
Operating Range
Table B-5
lists the operating range for the 1000BASE-LX models:
Table B-4.
Worst-Case 1000BASE-SX Power Budget and Penalties
Parameter
62.5 Micron
Multimode Fiber
50 Micron
Multimode Fiber
Units
Modal bandwidth as measured at 850 nm
(minimum, overfilled launch)
160
200
400
500
MHz · km
Link power budget
7.5
7.5
7.5
7.5
dB
Operating
distance 220
275
500
550
m
Channel insertion loss
1
,
2
2.38
2.60
3.37
3.56
dB
Link power penalties
4.27
4.29
4.07
3.57
dB
Unallocated margin in link power budget
0.84
0.60
0.05
0.37
dB
1 Operating distances used to calculate the channel insertion loss are the maximum values specified in
Table B-1
on
page B-1
.
2 A wavelength of 830 nm is used to calculate channel insertion loss, link power penalties, and unallocated margin.
Table B-5.
Operating Range for 1000BASE-LX
Fiber Type
Modal Bandwidth @ 1300 Nanometers with
Minimum Overfilled Launch (MHz · km)
Minimum Range (Meters)
62.5 um MMF
500
2 to 550
50 um MMF
400
2 to 550
50 um MMF
500
2 to 550
10 um SMF
N/A
2 to 5000
kombk.book Page 4 Tuesday, June 29, 1999 3:25 PM
Summary of Contents for BayStack 450 Switch
Page 6: ...kombk book Page vi Tuesday June 29 1999 3 25 PM ...
Page 14: ...kombk book Page xiv Tuesday June 29 1999 3 25 PM ...
Page 26: ...kombk book Page xxvi Tuesday June 29 1999 3 25 PM ...
Page 132: ...kombk book Page 24 Tuesday June 29 1999 3 25 PM ...
Page 226: ...kombk book Page 94 Tuesday June 29 1999 3 25 PM ...
Page 236: ...kombk book Page 10 Tuesday June 29 1999 3 25 PM ...
Page 270: ...kombk book Page 10 Tuesday June 29 1999 3 25 PM ...
Page 276: ...kombk book Page 6 Tuesday June 29 1999 3 25 PM ...