Foundry Networks LS 648 Cooling, Storage Environment, Mean Time Before Failure, Storage Humidity

Hardware Specifications

Storage Environment

Table 0.7 provides the storage environment specifications for the FastIron LS.

Table 0.7: Storage Environment

Storage Temperature	Storage Humidity	Storage Altitude
-40°to 158° F, -40°to 70° C	95% maximum, non-condensing	10,000 feet (3,000 meter)
		maximum

Mean Time Before Failure

Table 0.8 provides the intitial MTBF result for the FastIron LS (including the Power Supply Unit).

Table 0.8: Mean Time Before Failure Specifiations

Platform	Temperature	System Failure Rate	System MTBF
FLS624	25° C (76.9° F)	6,154.453471	162,484
	50° C (121.9° F)	15,164.358600	65,944
FLS648	25° C (76.9° F)	6,672.450037	149,870
	50° C (121.9° F)	15,531.295633	64,386

Cooling

The cooling fans cool the CPU, main memory, and voltage regulators. The fans use either a push or pull configuration to move the air from the left side of the device to the right side of the device.

•Total cooling capacity: 80 to 100 watts

•Total air flow: 200 LFM

•Operating noise: < 43 dB-A

NOTE: Operating noise is based on the ISO 7779 standard.

The following illustration shows the airflow for the device.

Air exhaust

Air inlet

September 2007 © 2007 Foundry Networks, Inc. 2 - 3