ISDN (Integrated Services for Digital Network). , ISDN , . ISDN , . ISDN (WAN), . ISDN PRI (Primary Rate Interface) BRI Basic Rate Interface, .

, BRI ISDN, () 64 / , B, , 16 /, D. , ISDN - DSS1 (Euro ISDN). , BRI 2B+D, 128 + 16 = 144 /. , BRI , , . .

, BRI .

1) ISDN NT (Network Termination) - S/T (S0)

I.430, (ITU). S/T 4 , (uplink), (downlink). . I.430 48- , 16 B1, 16 B2, 4 D, 12 , . 4 , , 192 /c, , , 144 /c. S0 - . 900 (-), 300 ( )

2) NT U

U . 160 /; 144 /, 12 /c 4 / . U , . , 2B1Q, 4B3T . U UpN, Up0 Uk0 . Uk0 NT . BRI 4 8 .


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P.S. , :)

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