Extreme Networks ExtremeSwitching VSP 7400 Series Hardware Installation Manual page 67

Fan and Acoustic Noise
Table 21: Fan and Acoustic Noise
Switch Model
VSP7400-32C-AC-F
(FB airflow)
VSP7400-32C-AC-R
(BF airflow)
VSP7400-48Y-8C-F
(FB airflow)
VSP7400-48Y-8C-R
(BF airflow)
Fan Tray and Speed Variation
Fan speeds are adjusted based on calculations of the temperatures on all sensors. Due to one fan being
located behind the other, air pushed from one fan may cause the other fan in the module to run at a
higher speed. One fan can run at medium speed while the other can spin at high speed if one is close to
the temperature boundary.
Table 22: Fan Tray Speed Variation
Description
Tray 1 Fan 1
Tray 1 Fan 2
Tray 2 Fan 1
Tray 2 Fan 2
Tray 3 Fan 1
Tray 3 Fan 2
Tray 4 Fan 1
Tray 4 Fan 2
Tray 5 Fan 1
Tray 5 Fan 2
Tray 6 Fan 1
Tray 6 Fan 2
* - The color of the tab on the fan tray indicates the airflow direction:
•
Red = Front-to-Back
•
Blue = Back-to-Front
VSP 7400 Series Switches: Hardware Installation Guide
Bystander Sound Pressure (at 25°C)
45 db(A)
47 db(A)
52.2 db(A)
50.5 db(A)
Operation Status
up
up
up
up
up
up
up
up
up
up
up
up
Declared Sound Power (at 25°C)
6.5 bels
6.7 bels
6.8 bels
6.7 bels
Operation Speed
high speed
medium speed
high speed
medium speed
high speed
medium speed
high speed
medium speed
high speed
medium speed
high speed
medium speed
Technical Specifications
Airflow Direction
Unknown*
Unknown*
Unknown*
Unknown*
Unknown*
Unknown*
Unknown*
Unknown*
Unknown*
Unknown*
Unknown*
Unknown*
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