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1988 Microsoft MS DOS 4.0, , , :). , , CCITT ISDN (Integrated Services Digital Network), .


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, ISDN , , (PSTN) - . . Integrated Services Digital Network, , .

ISDN - Integrated Services Digital Network

ISDN TDM (Time Division Multiplexing) . :)

ISDN , , . , ISDN . : 64 / 128 / BRI (/).

OSI (Open Systems Interconnection), ISDN 1, 2 3 (, ). BRI/PRI , , , (LAPD), , , 7 (SS7, Signaling System 7).


ISDN

ISDN:

  1. Basic Rate Interface (BRI) - BRI B , 1 D , . B 64 /, D 16 /c. , B , TCP/IP , ;
  2. BRI ;
  3. Primary Rate Interface (PRI) - 1 - ? 30? . , PRI D (, 1) 23 30 B , , ( TDM).;
  4. PRI SIP. :)
  5. Broadband-ISDN (B-ISDN) - ISDN. , , ISDN. , ;

ISDN

, , ISDN :

  1. - , (, ) . OSI. ISDN //. , ISDN ;
  2. - , 4 7 OSI. , . ISDN , , . , , ;
  3. - , , ISDN. :);

ISDN

, ISDN , CCITT ( ITU-T). ITU T :

  1. ISDN;
  2. ;
  3. 64 ;
  4. ;
  5. ISDN ( OSI);
  6. ;

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