958-000289-003, March 2005)

Director 2/64 installation guide 21

• Extended reach long-wave laser—Long-wave laser transceivers that provide connections for

transferring data over extended long distances (up to 35 kilometers) through 9-µm single-mode

fiber.

Rear view

Figure 3 shows the components accessible from the rear of the Director 2/64.

Figure 3 Director components—rear

Fan modules

Two fan modules, each containing three fans (six fans total), provide cooling for director FRUs, as

well as provide redundancy for continued operation if a fan fails.

The fan module can be replaced while the director is powered on and operating, provided the

module is replaced within 10 minutes (after which software powers off the director). An amber LED

for each fan module turns O

N if one or more fans fail or rotate at insufficient velocity.

SBAR assembly

The director ships with two SBAR assemblies. The active SBAR is responsible for Fibre Channel

frame transmission from any director port to any other director port. Connections are established

without software intervention. The assembly accepts a connection request from a port, determines if

a connection can be established, and establishes the connection if the destination port is available.

The assembly also stores busy, source connection, and error status for each director port.

1 Power module assembly

2 SBAR assemblies

3 Fan modules

SHR-2309