Page 188 of 544
Spares planning
553-3011-100
Standard 14.00
January 2002
Definitions and assumptions
Failure rate:
Spares planning is based on the Failure rate of the replaceable
part. The failure rate is defined as the estimated number of failures for that
item during one million (10
6
) hours of operation.
Sparing interval:
the sparing interval is the period of time that the stock of
items should last without being replenished. This period is assumed to be one
year after the installation of the system.
Stock confidence level:
the stock confidence level is the allowed probability
of not going out of stock during the sparing interval. This is assumed to be
greater than 99.9 percent.
Turnaround time for repair:
the turnaround time for repair is the length of
time it takes to repair a failed spares item.
The turnaround time from a repair house is estimated to be 10 working days
(240 hours). (See Figure 17).
Figure 17
Single depot or repair house service
The turnaround time from a centralized depot is estimated to be 2 working
days (48 hours). (See Figure 18.)
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Summary of Contents for Meridian 1 Option 11C Mini
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Page 8: ...Page 8 of 544 Contents 553 3011 100 Standard 14 00 January 2002 ...
Page 10: ...Page 10 of 544 About this guide 553 3011 100 Standard 14 00 January 2002 ...
Page 86: ...Page 86 of 544 Memory Storage and CPU capacity 553 3011 100 Standard 14 00 January 2002 ...
Page 176: ...Page 176 of 544 Transmission parameters 553 3011 100 Standard 14 00 January 2002 ...
Page 196: ...Page 196 of 544 Spares planning 553 3011 100 Standard 14 00 January 2002 ...
Page 226: ...Page 226 of 544 System Controller cards 553 3011 100 Standard 14 00 January 2002 ...
Page 260: ...Page 260 of 544 The TDS DTR card 553 3011 100 Standard 14 00 January 2002 ...
Page 282: ...Page 282 of 544 M2317 Telephone 553 3011 100 Standard 14 00 January 2002 ...
Page 308: ...Page 308 of 544 Meridian Modular Telephones 553 3011 100 Standard 14 00 January 2002 ...
Page 364: ...Page 364 of 544 M2250 Attendant Console 553 3011 100 Standard 14 00 January 2002 ...
Page 388: ...Page 388 of 544 NT8D14 Universal Trunk Card 553 3011 100 Standard 14 00 January 2002 ...
Page 408: ...Page 408 of 544 NT5K21 XMFC MFE card 553 3011 100 Standard 14 00 January 2002 ...
Page 414: ...Page 414 of 544 NTAG26 XMFR card 553 3011 100 Standard 14 00 January 2002 ...
Page 422: ...Page 422 of 544 NT6D71 UILC line card 553 3011 100 Standard 14 00 January 2002 ...
Page 492: ...Page 492 of 544 NTAK79 2 0 Mb PRI card 553 3011 100 Standard 14 00 January 2002 ...
Page 512: ...Page 512 of 544 NTAK20 clock controller 553 3011 100 Standard 14 00 January 2002 ...
Page 518: ...Page 518 of 544 NTAK93 D channel handler interface 553 3011 100 Standard 14 00 January 2002 ...
Page 544: ...Page 544 of 544 Index 553 3011 100 Standard 14 00 January 2002 ...
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