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Failure rates
The failure rates in Table 20 are for the Option 11C Compact system
components.
Note: Rates for circuit cards are based on 40°C ambient temperature.
Table 20
Failure rates for system components
NT code
NTMW01
NTMW02
NTMW03
NTMW04
NTMW05
NTMW06
NTMW07
NTMW10
NTMW11
NTMW12
NTDK21
NTDK22
Meridian 1 Option 11C Compact
Chapter 3 — Spares planning
Description
Circuit cards:
Small System Controller
card
Mail CPU
4-Port Mail
Daughterboard
DTI/PRI card
Digital Line Card
Analog Line Card
Line/Trunk Card
10 m Receiver card
Power supply
Analog Line
daughterboard
Software Daughterboard
10 m Fiber
Daughterboard
—Continued—
Page 35 of 136
Failure rate per
6 hrs.
10
1.67
1.41
0.69
0.80
0.72
1.48
0.44
1.21
0.94
0.48
0.63
1.21
Technical Reference Guide
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