363-206-295
Technical Specifications
Issue 1
December 1997
10-41
Table 10-22. DDM-2000 OC-12 Circuit Pack Reliability (Note 1)
Notes
:
1. Calculations are based on Bellcore RPP Issue 4 data. All KS and Lucent components
considered as quality level III. All components evaluated at 40
°
C ambient and 50
percent electrical stress.
2. FITS is the number of failures per billion hours of operation (10
9
).
* Not available at time of issue.
Table 10-23. DDM-2000 Fan Shelf Steady State Failure Rates (Based on Bellcore RPP
Issue 4 Data)
Circuit Pack
CO
RT
FITS (Note 2)
MTBF (Years)
FITS (Note 2)
MTBF (Years)
BBF2B (TGS)
2311
49.40
3467
32.93
BBF4 (TG3)
*
*
*
*
BBG8 (SYSCTL)
12806
8.91
19208
5.94
BCP3 (TSI)
2692
42.41
4038
28.27
BCP4 (OHCTL)
19240
5.93
28860
3.96
BBG11 (3DS3)
3144
36.31
4716
24.21
BBG11B (3DS3)
3144
36.31
4716
24.21
BBG12 (3STS1E)
2586
44.14
3879
29.43
21D/21D-U (OLIU)
1599
71.39
2399
47.59
21G-U/21G2-U (OLIU)
6348
17.98
9522
11.99
23G (OLIU)
10029
11.38
15044
7.59
23G-U (OLIU)
9023
12.65
13535
8.43
23H (OLIU)
12836
8.89
19254
5.93
23H-U (OLIU)
11552
9.88
17328
6.59
DDM-2000 Fan Shelf
Failures /10
9
hrs.
RPP Prediction
MTBF (years)
ED-8C733,G8 Fan Shelf
9879*
11.56
ED-8C733-30,G6 Fan Unit
2000
57.08
∗
This includes failure rates for individual fan units.