Extreme Networks Summit Summit1i, Руководство по установке оборудования

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1-6 Summit Switch Hardware Installation Guide
Summit Switch Overview
Table 1-3 describes the specifications for the 1000BASE-LX70 interface.
*The transmitter output power level for the 1000BASE-LX70 is +5 dBm. The maximum allowable receiver input power level is
-3 dBm. Therefore, there is a minimum of 8 dB loss required for the link to operate without errors. This minimum required loss
can be achieved using a fiber length of 32 km (0.25 dB/km provides 8 dB loss), or by adding 10 dB of fixed optical attenuator
at the receiver end.
Full-Duplex
The Summit switch provides full-duplex support for all ports. Full-duplex allows
frames to be transmitted and received simultaneously and, in effect, doubles the
bandwidth available on a link. All 10/100/1000 Mbps ports on the Summit switch
autonegotiate for half- or full-duplex operation. Gigabit Ethernet and 100BASE-FX ports
operate in full-duplex mode, only.
Table 1-3: 1000BASE-LX70 Specifications
Parameter Minimum Typical Maximum
Transceiver
Optical Output Power 0 dBm 3 dBm 5 dBm*
Center Wavelength 1540 nm 1550 nm 1560 nm
Receiver
Optical Input Power Sensitivity -20 dBm
Optical Input Power Maximum -3 dBm
Operating Wavelength 1200 nm 1560 nm