Extreme Networks Alpine 3804 Hardware Manual page 29

Table 4 describes the specifications for the SX mini-GBIC interface, and Table 5 describes the
specifications for the LX mini-GBIC interface.
Table 4: SX mini-GBIC specifications
Parameter
Transceiver
Optical output power
Center wavelength
Receiver
Optical input power sensitivity
Optical input power maximum
Operating wavelength
General
Total system budget
Total optical system budget for the SX mini-GBIC is 11.5 dBm. Extreme Networks recommends that 3
dBm of the total budget be reserved for losses induced by cable splices/connectors and operating
margin. While 8.5 dBm remains available for cable induced attenuation, the 1000BASE-SX standard
specifies supported distances of 275 meters over 62.5 micron multimode fiber and 550 meters over 50
micron multimode fiber. There is no minimum attenuation or minimum cable length restriction.
Table 5: LX mini-GBIC specifications
Parameter
Transceiver
Optical output power
Center wavelength
Receiver
Optical input power sensitivity
Optical input power maximum
Operating wavelength
General
Total system budget
Total optical system budget for the LX mini-GBIC is 13.5 dBm. Measure cable plant losses with a 1310
nm light source and verify this to be within budget. When calculating the maximum distance attainable
using optical cable with a specified loss per kilometer (for example 0.25 dB/km) Extreme Networks
recommends that 3 dBm of the total budget be reserved for losses induced by cable splices/connectors
and operating margin. Thus, 10.5 dBm remains available for cable induced attenuation. There is no
minimum system budget or minimum cable length restriction because the maximum receive power is
the same as the maximum transmit power. There is no minimum attenuation or minimum cable length
restriction.
Extreme Networks Consolidated Hardware Guide
Minimum Typical
-9.5 dBm
830 nm 850 nm
-21 dBm
830 nm
Minimum Typical
-9.5 dBm
1275 nm 1310 nm
-23 dBm
1270 nm
Mini-GBIC Type and Hardware/Software Support
Maximum
-4 dBm
860 nm
-4 dBm
860 nm
11.5 dBm
Maximum
-3 dBm
1355 nm
-3 dBm
1355 nm
13.5 dBm
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