Cisco Laser Link Mainframes 安装指南
78-4004177-01 Rev D
General Information
1-7
Laser Link Mini-Mainframe Description
Overview
This section contains physical and functional descriptions of the Laser Link Mini-
Mainframe.
Physical Description
The Laser Link Mini-Mainframe fits into a standard 2 RU (3.5 inch/8.89 cm) high by
19- or 23-inch (48 or 58 cm) wide area that is approximately 20 inches (51 cm) deep.
It should be mounted in a cabinet that conforms to ANSI/EIA-310-C standards. The
2 RU space accommodates four half-width modules or two full-width modules.
Mounting brackets (19”) are provided with each unit.
Self-adhesive fiber routing clips are provided to secure fiber routed from modules.
Mounting brackets (19”) are provided with each unit.
Self-adhesive fiber routing clips are provided to secure fiber routed from modules.
Power Distribution
Main power may be universal AC, -48 V DC, or +24 V DC input. With universal AC
or -48 V DC, the mainframe chassis requires a power supply or converter,
respectively. The power supply is located behind the fan assembly. This unit
accepts the AC or the -48 V DC and performs the required conversion to output +24
V DC to the power distribution board. Should the +24 V DC be available, the
mainframe may be operated without a power supply by applying the voltage
directly to the power distribution board.
Voltage applied to the power distribution board (+24 V DC, 2.5 A maximum) is
Voltage applied to the power distribution board (+24 V DC, 2.5 A maximum) is
routed to the various modules installed in the mainframe. Each module requires this
voltage for normal operation. The power distribution board accepts +24 V DC as the
primary input power (supply A) through the connector labeled J3. The potential is
then applied to the modules through the interface cable provided with each module.
This cable connects the 26-pin interface on the Mini-Mainframe (JXA1) to the rear
panel power/status D connector on the module. The fuse labeled F3 protects the
primary power (supply A).