7 IP

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    09-Aug-2015

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7 IP. . TDM . 7 (7), . 7 . IP- , , , VoIP . , , 7 IP. VoIP TDM, , IP . (7, Q.931, DPNSS, V5.2 .) IP IETF SIGTRAN. 7 IP , , : M2PA (MTP2 Peer-to-peer Adaptation), M3UA (MTP3 User Adaptation) SUA (SCCP User Adaptation). . M2PA, M3UA SUA, . 7 IP 7. 7- 2005 . 7 7 : (MTP1, MTP2, MTP3), 1, 2- 3- OSI, (. 1). MTP1 MTP2 7 OSI. MTP1 , , MTP2 , . MTP3 7 OSI, . , , . 7 (SCCP), (GTT). M2PA, M3UA SUA , () 7 ( IP ). , M2PA MTP2, M3UA MTP3, SUA SCCP. SCTP 7 IP, SIGTRAN, SCTP (Stream Control Transmission Protocol) . SCTP MTP1 MTP2 7. SCTP TCP. TCP- SCTP , . IP-, . . , IP , . - IP- - , SCTP- . SCTP- SCTP multihoming. SCTP : SCTP/IP (chunk bundling), ; , , TCP, (head-of-line blocking); , . M2PA M2PA (. 2) MTP3 IP, . ., , 7 M2PA . 7: (SLS), , (change-over) (changeback), . . M2PA; M3UA SUA , 7 IP . M2PA (STP), MTP2- 7, M2PA- IP. SCTP IP M2PA- , TDM- 7, , , . M2PA- 7 , (NGN), . M3UA ISUP. VoIP- 7, IP (softswitch). IP- NGN M3UA (. 3). M3UA ISUP, 7, SCCP (MAP, INAP .). M3UA IP- 7 1 MTP 7, . M3UA . , MTP 7 . , , SIGTRAN, (Application Server AS) , (Routing Key RK) , . . , , RK. AS , , . (RK) 7, , AS. RK DPC ( ), OPC ( ), SI ( ), . AS (Application Server Process ASP), . AS , ASP IP. ASP AS: . ASP- AS. ASP, . ASP , ASP . , AS ASP ( ASP ) ( ASP) M3UA. SUA SUA 7 ( M3UA). MTP SCCP, ASP SCCP (. 4). IP-. ISUP SUA, MTP3 7. SUA M3UA . M3UA 7, AS . , , SUA. SIGTRAN , . , , 7 IP, M2PA. M3UA SUA, 7 IP-. SIGTRAN , . , 7, , . SIGTRAN , ( , .). , , (QoS) , . .