Extreme Networks BlackDiamond 10808 Installation Guide download pdf (Page 13)

Mini-GBIC Type and Hardware/Software Support

Extreme Networks BlackDiamond 10K-Series Switch Installation Guide 13

Table 3 describes the specifications for the SX mini-GBIC interface, Table 4 describes the specifications

for the LX mini-GBIC interface, and Table 5 describes the specifications for the ZX mini-GBIC interface.

Total optical system budget for the SX mini-GBIC is 11.5 dB. Extreme Networks recommends that 3 dB

of the total budget be reserved for losses induced by cable splices/connectors and operating margin.

While 8.5 dB 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.

Total optical system budget for the LX mini-GBIC is 13.5 dB. Measure cable plant losses with a 1310 nm

light source and verify this to be within budget. When you calculate 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 dB 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.

Table 3: SX mini-GBIC specifications

Parameter Minimum Typical Maximum

Transceiver

Optical output power -9.5 dBm -4 dBm

Center wavelength 830 nm 850 nm 860 nm

Receiver

Optical input power sensitivity -21 dBm

Optical input power maximum -4 dBm

Operating wavelength 830 nm 860 nm

General

Total system budget 11.5 dB

Table 4: LX mini-GBIC specifications

Parameter Minimum Typical Maximum

Transceiver

Optical output power -9.5 dBm -3 dBm

Center wavelength 1275 nm 1310 nm 1355 nm

Receiver

Optical input power sensitivity -23 dBm

Optical input power maximum -3 dBm

Operating wavelength 1270 nm 1355 nm

General

Total system budget 13.5 dB

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Extreme Networks BlackDiamond 10808 Installation Guide Page 13