Comdial DX-80 - Automatic Hold Feature

Overview
38 Comdial October, ‘03
1.15.10 MTBF (MEAN-TIME BETWEEN FAILURE) DATA
Mean-Time Between Failure Analysis
System Components
Cabinet Assembly 86.0
Power Supply Unit 170.0
CPM 2915.7
408M 11407.3
DPM8 3560.8
COM4 6146.5
APM4 6860.2
MDM 761.0
AAM 2337.3
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 ³ )x(109) = MTBF hours