Телекоммуникационные системы
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172
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7.9.
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7.9 - ISDN BRI
1 – , -
ISDN, -
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7.10.
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7.10 -
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64 .
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7.3.3DSL
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2BIQ CAP – 64 1168 .
7.12 - 2BIQ CAP – 64(6.7
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TC – PAM(Trellis Coded Pulse Amplitude Modulation.
2BIQ
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( 7.13).
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7.13 - ADSL
ADSL dial up. -
( 3 ) -
0.4 – 0.5 . -
, DSL Access Module (DSLAM). , DSLAM Ethernet, -
, .
DSL DSLAM :
( ) 0.3 – 3.4
(downstream) -
1.5 6
(upstream) -
15 640 .
-
, 1.536
2.048 . , -
( , ,
).