Extreme Networks ExtremeWare 7.2e, Инструкция по установке и эксплуатации

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26 ExtremeWare 7.2e Installation and User Guide
Summit 400-48t Switch Overview and Installation
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 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 dB 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 attenuation or minimum cable length restriction.
ZX Mini-GBIC Specifications
Table 7 describes the specifications for the ZX mini-GBIC.
Long Range GBIC System Budgets
Measure cable plant losses with a 1550 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 dB of the total budget be reserved for
losses induced by cable splices, connectors, and operating margin. Figure 3 shows the total optical
system budget between long range GBICs in various end-to-end combinations (ZX, ZX Rev 03, LX70,
and LX100).
NOTE
The ZX mini-GBIC is equivalent to the ZX Rev 03 GBIC.
Table 6: 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
Table 7: ZX mini-GBIC specifications
Parameter Minimum Typical Maximum
Transceiver
Optical output power –2 dBm 0 dBm 3 dBm
Center wavelength 1540 nm 1550 nm 1570 nm
Receiver
Optical input power sensitivity –23 dBm
Optical input power maximum –3 dBm
Operating wavelength 1540 nm 1550 nm 1570 nm