General InformationI

SFP Transceivers

A single-mode or multi-mode fiber-optic cable attaches to a port through a pluggable small form factor (SFP) transceiver. The SFP provides a duplex LC interface, and can be detached from the switch port for easy replacement. Two fiber-optic transceiver types are available:

•Shortwave laser—Shortwave laser SFPs provide short-distance connections (2 to 500 meters) through 50-micron or 62.5-micron multi-mode fiber.

•Longwave laser—Longwave laser SFPs provide long-distance connections (up to 10 kilometers) through 9-micron single-mode fiber.

•Extended reach laser—Extended reach laser SFPs provide long-distance connections (up to 35 kilometers) through 9-micron single-mode fiber.

Cooling Fans

Three 2-fan FRUs (a total of six fans) provide cooling for the switch power supplies and the control processor (CTP) card, as well as redundancy for continued operation if a single fan fails.

Each fan FRU can be replaced while the switch is operating.

Power Supplies

Redundant, load-sharing power supplies step down and rectify facility input power to provide 3.3 volts direct current (VDC), 5 VDC, and 12 VDC to the CTP card. The power supplies also provide input filtering, overvoltage protection, and overcurrent protection. Either power supply can be replaced while the switch is operational.

Each power supply has a separate CTP card connection to allow for independent AC power sources. The power supplies are input-rated at 100 to 230 volts alternating current (VAC).

Connectors and Indicators

Connectors and indicators include the:

•Initial machine load (IML) button.

•Ethernet LAN connector.

•Green power (PWR) and amber system error (ERR) LEDs.

•Green and amber status LEDs associated with FRUs.