
Page 716 of 906
NTAK09 1.5 Mb DTI/PRI card
553-3001-211 Standard 3.00 August 2005
Digital pad
The digital pad is an EPROM whose address-input to data-output transfer
function meets the characteristics of a digital attenuator. The digital pad
accommodates both µ255-law and A-Law coding. There are 32 combinations
each for µ255 to µ255, µ255 to A-Law, A-Law to µ255, and A-Law to A-Law.
These values are selected to meet the EIA loss and level plan. See
Table 231.
Table 231
Digital pad values and offset allocations
Offset
PAD set 0
PAD set 1
0
0dB
–7db
1
2dB
–8db
2
3dB
–9db
3
4dB
–10db
4
5dB
0.6db
5
6.1dB
7db
6
8dB
9db
7
–1dB
10db
8
–3dB
11db
9
–4dB
12db
A
idle code, 7F
3db
B
unassigned code, FF
14db
C
1dB
spare
D
–2dB
spare
E
–5db
spare
F
–6db
spare
Содержание Circuit Card
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Страница 4: ...Page 4 of 906 Revision history 553 3001 211 Standard 3 00 August 2005...
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Страница 100: ...Page 100 of 906 Acceptance tests 553 3001 211 Standard 3 00 August 2005...
Страница 156: ...Page 156 of 906 Option settings 553 3001 211 Standard 3 00 August 2005...
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Страница 388: ...Page 388 of 906 NT6D71 UILC Line card 553 3001 211 Standard 3 00 August 2005...
Страница 533: ...NT8D02 and NTDK16 Digital Line cards Page 533 of 906 Circuit Card Description and Installation Figure 106 NTDK16 DLC...
Страница 544: ...Page 544 of 906 NT8D02 and NTDK16 Digital Line cards 553 3001 211 Standard 3 00 August 2005...
Страница 546: ...Page 546 of 906 NT8D03 Analog Line card 553 3001 211 Standard 3 00 August 2005...
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Страница 768: ...Page 768 of 906 NTAK93 D channel Handler Interface daughterboard 553 3001 211 Standard 3 00 August 2005...
Страница 772: ...Page 772 of 906 NTBK22 MISP card 553 3001 211 Standard 3 00 August 2005...
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Страница 906: ...Page 906 of 906 Appendix A LAPB Data Link Control protocol 553 3001 211 Standard 3 00 August 2005...
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