Sun Microsystems Netra t1 100, User And Administration Manual

Page: 27 / 154

Chapter 1 Before You Begin 5
Acoustic Noise Generated by the Netra t1
The system generates less than 60 dBA at a distance of 600 mm and a height of
1500 mm (operating in an ambient temperature of 25˚C).
Environmental Compliance Information
■
NEBS environmental criteria
The system conforms to GR-63-CORE issue 1, October 1995
■
Electro-magnetic compatibility
■
Immunity: The system conforms to GR-1089-CORE and EN50082-1
■
Emissions: The system conforms to GR-1089-CORE, EN55022 Class A and FCC
Class A
■
Safety
The system conforms to UL 1950 (3rd edition), EN60950, GR-1089-CORE
Choosing Between a Rack and a Cabinet
Netra t1 servers can be installed in either racks or cabinets. Factors that may
influence your decision include:
■
Security
If other people have access to the room in which your Netra systems are located,
you can increase security by locking the systems in a cabinet.
■
Thermal issues
Cabinets often require additional fans, because the systems you install in them are
generating heat in an enclosed space. Two-post racks, however, may require no
special cooling systems.
■
Flooring
Two-post telco relay racks are designed so that cables can be run overhead.
Cabinets often require cables to be run under the floor.
What’s Next?
When you have read this chapter, go to Chapter 2 to find out how to calculate the
power and cooling requirements for your system.
SysAdmin.book Page 5 Friday, March 30, 2001 2:38 PM