[asterisk-users] Quiet 24 port POE gig switch

[Steve Underwood]

Singer XJ Wang wrote:
> [snipped]
>> You can do that by using fans other than the tiny, whiney, 40mm fans
>> that vibrate at 6000 to 18,000 Hz. A couple of 80 or 120 mm muffin
>> fans at the back or front, pushing air in (hence the deep
>> dimensions), but the top and bottom would need recesses to allow
>> sufficient airflow when the positions above and below are filled.
>>   
> How are you getting these 80 or 120mm fans in a 1U chassis? Remember 
> you got barely 45mm to play
> with at the back and front of the switch. How are you going to mount a 
> 80mm or 120mm fan on there? Are you assuming that the units mounted
> above (or below) your switch is a short 1U? You can't assume that...
A number of 1U products use large impeller fans. They take more internal 
space in the chassis, but they are slower and quieter. Tiny whiny seems 
to be the current fashion, though.

Steve