, . . (Plain Old Telephone Service POTS) , , ISDN. . , , ISDN . , , , ISDN , , ISDN. ISDN , , .
, .
, .25 frame relay, - . , , , , . .25 frame relay ROBO, , . .25 PAD, , .
, . , , , , , . , ISDN , 64 / 64 / frame relay .
, . , . 20-40 ISDN. , 40 , 60-80, frame relay. , , , . frame relay.
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-
, . (Remote Access Server, RAS), . , , .
, , , . , ( ), , , , ( ), .
(Communication Server). , /, . , , , . , , . , dial-out , - .
(Remote Access Server, RAS) , , , . . . dial-in , , , . . .
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, - , . . Microsoft RAS, Windows NT, NetWare Connect, NetWare.
dial-in , dial-out .
dial-in dial-out , ..
- : , .
- (remote node). ( ISDN) , . , . , , . . ISDN, SLIP, . .25 frame relay , LAP-B .25/3 LAP-F ( frame relay ). , , , , , , , . IP, IPX NetBEUI. , , , .
, , , , . , 33,6 / , 3 % Ethernet, , 30 , 15-20 . , , .
. . , . , .
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, , -, , . - (, Oracle, Informix, Microsoft SQL Server), , . , User Manager for Domains Windows NT.
, , .
WAN- , ISDN- PAD X.25. , , . , .
. IP, IP-, , . ARP(, proxy ARP), - IP-, . NetBIOS , .
, ( ), .
Mac OS,OS/2, Windows 95 Windows NT Workstation . . , .