Page 194 of 544
Spares planning
553-3011-100
Standard 14.00
January 2002
NTAK76 battery back-up unit
The batteries supplied with the NTAK76 have an average useful life of four
years, meaning the batteries are depleted to 80% of capacity, and backup time
is diminished. After this period of time the batteries should be replaced. For
more information refer to the
Option 11C and 11C Mini Fault Clearing
(553-
3011-500)The mean time between failures (MTBF) of the NTAK76 without
batteries is 370 years at 25
°
C.
6.37
6.99
17
6.99
7.62
18
7.62
8.26
19
8.26
8.91
20
8.91
9.57
21
9.57
10.20
22
10.2
10.90
23
10.9
11.50
24
11.5
12.20
25
12.2
12.90
26
12.9
13.60
27
13.6
14.30
28
14.3
15.00
29
15.0
15.80
30
Table 59
Number of spares required (Part 2 of 2)
NFT values
Number
of spares
Summary of Contents for Meridian 1 Option 11C Mini
Page 2: ......
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 ...
Page 545: ......