Lexmark IBM 9077 manual GRF Features, GRF Part Description, IP Switch

Power SupplyThe left side of the chassis is reserved for the two power supplies that are required for redundancy.

The failed power supply can be hot-swapped out of the GRF chassis.

GRF 1600

Part Description

Cooling FansThese are located at the top of the chassis, and can be accessed separately from the other parts of the GRF. The fan tray contains redundant fans and is hot-swappable.

Media CardsThere are 16 media card slots on this chassis. They are slotted vertically. Eight of the cards are on the left side of the chassis, and eight are on the right side.

IP Switch and

Control BoardThese boards are located in the middle of the 16 media slots and are also slotted vertically.

Power SupplyThe base of the chassis is reserved for the two power supplies that are required for redundancy. The failed power supply can be hot-swapped out of the GRF chassis.

2.3.2 GRF Features

GRF has the following features:

•Redundant power supply

Should any power supply fail, a message is sent to the control board. The power supply will automatically reduce its output voltage if the temperature exceeds 90 °C (194 °F). If the voltage falls below 180V, the GRF automatically shuts down.

•Hot-swappable power supply

The faulty power supply can be replaced while the GRF is in operation.

•Redundant fan

For the GRF 1600 model, if one fan breaks down, a message is sent to the control board.

For both models, when the temperature reaches 53°C (128 °F), an audible alarm sounds continuously, and a message is sent to the console and logged into the message log.

26IBM 9077 SP Switch Router: Get Connected to the SP Switch