Nortel CMTS 1000, Install Manual

Page: 40 / 246

2-4 302693-B Rev 00
CMTS 1000 Installation Manual V1.2
Cooling Requirements
The CMTS 1000 is designed for standard rack mounting in a 19” equip-
ment rack. It requires 2.6 inches of vertical rack space (1.5 rack units). It
should be installed in a rack allowing some access to the back of the unit.
The CMTS 1000 should be free of strong RF radiation emanating from
local equipment in the rack. Power line transients that may cause damage
to the unit should be avoided. It should be installed in a location with ade-
quate ventilation. It is designed to operate at temperatures ranging from
+5
°
C to +40
°
C.
As with all electrical equipment, operation at excessive temperature accel-
erates the deterioration of components and adversely effects performance.
For this reason, measures should be taken to prevent the buildup of exces-
sive heat in the rack.
Precautions should include:
• Full rack space between every unit
• Forced ventilation in an enclosed rack
Caution - CMTS 1000 has vents on the side panel for air intake. The
CMTS 1000 also has a fan on the opposite side panel. When you install
CMTS 1000 in a rack, make sure objects do not block the vents on the side
panel or the fan on the opposite side panel.
If the CMTS 1000 is installed in a closed or multi-unit rack assembly, the
operating ambient temperature of the rack environment may be greater
than room ambient. Therefore, consideration should be given to installing
the CMTS 1000 in an environment compatible with the maximum rated
ambient temperature (Tmra), as specified in the Specifications section in
Chapter 1.
Installation of the equipment in a rack should be such that the amount of air
flow required for safe operation of the equipment is not compromised.
!