IHSE USA 480 Series Draco tera enterprise - Manual (Page 193)

Specifications
2013-08-14
193
7.9 MTBF
The following table contains the mean time between failure (MTBF) in
power-on hours (POH). The estimate is based on the FIT rates of the
parts included. FIT rates are based on normalized environmental
conditions of T = 60°C and activation energy (E
a
) of 0.7 eV. Calculations
are based on 90% confidence limit.
We estimate that inside the housing, temperature will be 15°C higher than
the ambient temperature. Therefore, the MTBF calculation refers to an
ambient temperature of 45°C. The humidity is limited to 60%.
Draco tera 288 chassis 260,000 POH
Draco tera 160 chassis 310,000 POH
Draco tera 80 chassis 320,000 POH
Draco tera 48 chassis 350,000 POH
CPU board 480,000 POH
I/O board SFP 500,000 POH
I/O board Cat X 410,000 POH
Draco tera 288/160 PSU 200,000 POH
Draco tera 80/48 PSU
130,000 POH
Pos: 157 /806-IHSE/Wartung/480-xx_Wartung @ 8\mod_1351506868807_6.doc @ 69520 @ 122222 @ 4