DHS Technical Specification Tables
2-21
Table 2-10: Mean Time Between Failure Analysis
Component
MTBF (hr)
Case Assembly
100.0
Power Supply Unit
193.0
CPU Module
3095.0
Standard Music On Hold Module
325.7
3 x 8 Module
5744.0
6-Port CO Line Module
7201.2
Option Module
2866.0
Basic Key Telephone
2988.3
Enhanced Key Telephone
4205.3
Executive Key Telephone
4275.3
2-Port CO Module and 2-Port Analog Expansion
5000.9
Method:
Use the figures above for each unit installed (or to be installed)
and calculate the total for this system configuration.
Use the total from Step 1 in place of the variable x in the formula
at the right to calculate MTBF for this system configuration.
(1
÷
x)(10
9
) = MTBF hr
Содержание Starplus DHS
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