Nortel Passport 15000 Hardware Description page 132

132 Chapter 3 Shelf assembly
241-1501-200 5.2S2
To calculate the power consumption of the selection of cards on your shelf,
see the section on power distribution and consumption in 241-1501-205
Passport 15000, 20000 Site Requirements and Preparation Guide.
Table 18
Maximum shelf heat dissipation relative to ambient room temperature
Ambient room
temperature
degrees
25 Celsius
(77 Fahrenheit)
30 Celsius
(86 Fahrenheit)
35 Celsius
(95 Fahrenheit)
40 Celsius
(104 Fahrenheit)
In general, if the comparison of power consumptions exceeds either the value
of total or combined power dissipation, and the cooling unit is unpowered,
service will be affected as follows.
• At 65 degrees Celsius (149 Fahrenheit) inside a fabric, a temperature
alarm occurs. Service is unaffected.
• At 72 degrees Celsius (161.6 Fahrenheit) inside a fabric, the fabric is
automatically shut down to protect it. When both fabrics reach the
threshold, the shelf reboots until the temperature sensor inside either
fabric drops below the threshold. A rebooting shelf drops all service.
For more information on the effects of temperature, refer to the environmental
data and power dissipation in 241-1501-205 Passport 15000, 20000 Site
Requirements and Preparation Guide.
Total power
dissipation of all
CPs and FPs
1350 watts
1200 watts
1040 watts
900 watts
Combined power
dissipation of card in bottom
cage and the one above it
170 watts
150 watts
130 watts
110 watts