Nortel Networks HotWire 8600 - Manual (Page 57)

Technical Specifications
C-2 8600-A2-GN20-20 October 1997
Specifications Criteria
Power Two versions of the HotWire 8600 DSLAM chassis
are available: an ac power version and a dc power
version.
The ac version can be connected to a dc source to
provide power redundancy. With the dc version,
two separate dc sources may be employed to
provide power redundancy.
The ac version accepts ac power (100 – 250V,
50 – 60 Hz) and converts it to dc power. The
maximum current draw is less than 1.75 amps, or
75 watts @ 110 Vac. At maximum configuration
with 3 DSL cards, the system will not exceed
85 watts of power dissipation.
The HotWire 8600 DSLAM chassis dc version
operates from a standard – 48 Vdc power supply
(– 40.0 to – 60.0 Vdc). The maximum current draw
is 2 amps. At maximum configuration with 3 DSL
cards, the system will not exceed 75 watts of
power dissipation.
Each power version distributes – 48 Vdc power
from the power source to individual cards via the
backplane.
Grounding A ground lug is located at the rear of the HotWire
8600 DSLAM at the center. It accepts 14 AWG
wire.
A non-insulated banana jack is located at the left
front of the 8600 DSLAM providing a ground for
the ESD wrist strap plug.
Cooling and Air Handling The internal fan module is installed in the chassis
to provide cooling.
A built-in feature shuts off power to the circuit
cards if a chassis overheats because of fan failure.
If the temperature in the chassis reaches 70
°
C,
power to the cards in the chassis is turned off
automatically. Power is turned on when the
temperature drops below 60
°
C.
Operating Environment Ambient Temperature: 32
°
to 122
°
F (0
°
to 50
°
C)
Relative Humidity: 15% to 90% non-condensing
Shock and vibration sufficient to withstand normal
shipping