
Телекоммуникационные системы
..pdf
191
7.5.2 IP – ( )
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7.2. -
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V0 ATM ( ATM).
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192
2.. IP – -
IP – .
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IP-
ITU – H.323. IP –
7.22
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7.22 - . 323
:
IP IP
( “ - ”);
IP ISDN
( “ - ”);
,
IP ( “ - ”).
:
IP – H.323 ( 7.23)
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7.23 - IP –
193
( + ), -
– ,
64 6·16 , -
/ .
IP – ( ), -
, -
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.
H.323 –
IP – , -
H.323, -
( ) (ISDN).
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IP - ;
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IP – , “ -
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( ).
, IP -
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IP –
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IP ;
( ) -
IP – ;
(Q0S) IP ,
RSVP, Diff – Serv, MPLS .
7.5.3
-
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194
4 -
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1.. -
SDH .
( -
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(1,4).
2.-
( 7.24)
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(
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– (HFC). . 3. -
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–
( 7.26), .

195
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7.26 -
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HFC
( ), ( ). -
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7.27. -
( )
50 . ( -
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30 – 40
QAM – 64 QAM – 256.

196
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7.27 -
HFC
(2 – 10 )
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QPSK. -
(
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, . HFC
“
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HFC
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(ATM, IP - MPLS).
197
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198
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0,05 .
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1.
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SDH (STM-16, STM-64) Gigabit Ethernet. -
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8.2 .
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, Gigabit Ethernet .). -
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8.2.1 SDH
SDH ( 8.1)
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16-
STM-1, 5 . -
( ).
, ( )
( ).
.
199
NMT-450 GSM.
STM-4, STM-16, ,
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SDH-PDH ( 8.2). -
, Gigabit Ethernet.
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(IP) -
, .
-
Fast Ethernet Gigabit Ethernet
. -
Mi, -
( dial up, ADSL(DSLAM)
,
(DSL) ).
