ND-71548 (E) CHAPTER 2
Page 9
Issue 2
INSTALLATION DESIGN
Note: A short period means a period not exceeding three consecutive days (72 hours) or 15 days (360 hours) in
a year.
2.2 Heat Generation From Switching Equipment
Figure 2-1 shows heat generation from the switching equipment with respect to current consumption.
Figure 2-1 Heat Generation from Switching Equipment for the PBX
Table 2-1 Temperature and Humidity
TEMPERATURE RELATIVE
HUMIDITY REMARKS
During
Operations
Normal Operations 5°C - 30°C (41°F -86°F) 15% - 65%
Short Period Note 0°C - 40°C (32°F-104°F) 15% - 90%
During Storage & In Transit –18°C - 50°C (0°F -122°F) 8% - 90%
Temperature Change Max. 5°C/30 Min. (9°F/30 Min.) 90%
Note: BTU; British Thermal Unit (1 BTU=1058.4J)
BTU/hour
100 200 300 400 500 600 700 800 900 1000
No. of PORTS
3.5K
3.0K
2.5K
2.0K
1.5K
1.0K