Specifications

Reference Guide 2-3
System Installation Introduction
2.1.4 Choosing a Location for Your System
The integrated access system requires a reasonably dust-free, static-free operating
environment, such as a computer room. Adequate ventilation is also required at the site. Do
not install the chassis in direct sunlight, which may increase the system’s operating
temperature and affect its operation.
Most of the system plug-in cards have highly sensitive components that could be damaged by
static electricity. Whenever you handle any system cards, be sure to observe local electrostatic
discharge (ESD) precautions.
The mounting brackets supplied with the chassis are needed for tabletop installation, to ensure
proper air flow through the chassis. The top and bottom of each chassis also must be clear of
objects.
The system chassis can be installed on a 19-inch or 23-inch equipment rack, attached to a wall,
or placed on a tabletop or other level surface. First, though, make sure the desired surface can
support the weight of a fully equipped chassis.
The system specifications section in this manual lists the maximum power consumption of
each system card. Use this table to calculate the total system power consumption.
The system specifications section in this manual lists some typical current measurements for
each card at every DC operating voltage that card uses.
Also be sure to locate the system near all external equipment to which you will connect it.
Cable lengths and physical/electrical characteristics are critical to system operation, especially
for data signal interfaces. Generally, higher CPE data rates require shorter cables than lower
data rates. Also, you must use T1-grade or E1-grade cables for all system connections to those
networks. For best results, use the cables supplied by your supplier when connecting your
system to the associated external facilities. For more information on system cabling, call your
supplier.
2.1.4.1 Rack Installation Tips
When installing the chassis in a rack, allow at least 2 inches (5.1 cm) of space between the
chassis and the equipment above and below it for proper ventilation. Use the mounting
brackets and attachment hardware furnished with the chassis for this purpose, as outlined in
the next section. If you use other mounting hardware, you may damage the chassis.
Also route all cables to their destinations through conduits, to enhance EMC performance and
facilitate future system troubleshooting. When routing cables, be sure not to obstruct any
chassis vents.