SIP , -:
- -, SIP- ;
- -, , ;
- -, .
, - -, -.
MGCP
IP- MEGACO IETF MGCP (Media Gateway Control Protocol) - -. , :
(SG - Signaling Gateway) - () ; STP (. .7-12) - -7;
-, (MG - Media Gateway) - , , IP- ( RTP/UDP/IP) ;
, ( - Call Agent) - MG -; , .. .
, IP-. IETF , .. 11.323, SIP, ISUP/IP, .12-24.
.12-24. IP
MGCP UDP. SG, -7 . ( TCP) SCTP (Stream Control Transmission Protocol - () TCP/IP), .
MGCP , . , , , . SG . IP-, MGCP .. () MG SIP.
MGCP (Connection Model), MEGACO. :
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- (Endpoints) - ( ) - ;
- Connection - , ; IP- .
IP- MGCP :
1 →-1 →-1 →......→-1 →-2→-2
, , , : IP-, UDP/RTP-, , . SDP.
MGCP , .. . , . , ( ): ( ), ( RFC 821), .
, IPT, , MGCP, , .323 , -7, .323 .225.0. , SIP. .323, .
IP-
(Nortel, Cisco, Ericsson, Lucent/Alcatel, NEC .), VocalTec Dialogic, 1999. IPT, SIP ( ), .323 ( ).
IPConnect Nortel, /: .323, MGCP, ISUP PRI (. . 12-25, ) :
- IP- CVX-1800;
- - ICE (IPConnect Call Engine);
- - SG (Signaling Gateway);
- , , IVR (Interactive Voice Response) - - , , .
IPT CVAS (Carrier VoIP and Application Solutions) IP. , , Nortel 8 (2002-2010).
CVAS - IP- - : , IPT- . triple-play quad-play ( IPTV , ) , .
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SIP MGCP, CS-1500, (softswitches) CS-2000, TAS DPM Sigma Systems.
.12-2S. IPConnect
IP-
IPT:
IPT, ;
Ethernet IP-;
() IPT, Ethernet DHCP;
IP-.
( ) DCP, .
12.7.1.1. IP-PBX/
IP-PBX/ - /. : . IP. . IP-PBX/ ( IP-) , , , . , 15 , , IP- IP- , IP- .
, , ISDN, ().
IPT , IP- IP-, IP- (IP-). IPT . , IP- IP-TA, .
I-/:
- Auto Attendant - :
- Call Blocking - ;
- Call Detail Records - CDR ( );
- Call Forwarding - ;
- Call Pick-up - ;
- Call Queuing - ;
- Call Transfer - ;
- Call Wailing - - , , ;
- Caller ID - ;
- Conferencing - ( );
- Conversation Recording - ;
- Interactive Voice Response (IVR) - ;
- Music On Hold - ;
- Protocol Bridging - , ;
Voicemail System - .
IP- (IP-TA)
IP-TA, , , .323, SIP MGCP, , . - , .
IP-TA : G.711, G.729 G.723.1, (64, 8 6,3//5,3 /) .(. .12-1); : 1,5; 15 37,5 .
IP-TA , ISDN-TA, , :
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- , : IEEE 802.1p ( ), ToS (none ) DiffServ ( QoS );
- IEEE 802.3af, ( Ethernet) ();
- : , Bluetooth, Ethernet- (10/100/1000 /) , USB- ;
- .. : , .
:
- - , ;
- - Ethernet ;
- - - ;
- () (DSP);
- (, ) - .