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Extreme Networks BlackDiamond 10808 Guía de instalación Pagina 11

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Types of Optical SFP Interfaces
Extreme Networks Pluggable Interface Modules Installation Guide
11
Optical Budget Calculation
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 dB of the total budget be reserved for
losses induced by cable splices or connectors, and operating margin. 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.
ZX SFP Module
The ZX SFP module is a long-haul SFP that provides a 1000BASE-T optical connection using LC
connectors and SMF cable up to 80 km long.
ZX SFP modules are supported on the following Extreme Networks switches:
● BlackDiamond 10808
● BlackDiamond 8800 series
● BlackDiamond 12800 series
● Summit X150 series
● Summit X250e series
● Summit X450 series
● Summit X450a series
● Summit X450e series
Optical Budget Calculation
Measure cable plant losses with a 1550 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 you reserve 3 dB of the total budget for
losses induced by cable splices or connectors and operating margin. A minimum system budget or
attenuation is required to prevent saturation of the receiver.
1000BASE-BX Bi-Directional SFP Modules
The 1000BASE-BX SFP modules include the 1000BASE-BX-U SFP module and the 1000BASE-BX-D SFP
module. These two SFP modules are used together to permit a bidirectional Gigabit Ethernet connection
using a single strand of SMF cable and LC connectors. The 1000BASE-BX-D SFP operates at
wavelengths of 1490 nm TX/1310 nm RX, and the 1000BASE-BX-U SFP operates at wavelengths of 1310
nm TX/1490 nm RX. The 1000BASE-BX-U SFP module is always connected to the 1000BASE-BX-D SFP
module. The maximum transmission distance for this connection is 10 km. The 1000BASE-BX SFP
modules conform to the IEEE 802.3ah 1000BASE-BX10 standard.
The 1000BASE-BX SFP modules are supported on the following Extreme Networks switches:
● BlackDiamond 10808
● BlackDiamond 8800 series
● BlackDiamond 12800 series
● Summit X150 series
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