H.323
ITU
IP H.323 , , .
, , H.323?
. , .

(SETUP) RAS (Registration, Admission, Status) H.225.0 .
1 RAS ARQ (Admission Request), . ACF (Admission Confirmation), TCP .
, 1 TCP-, , H.225.0, SETUP 2. , SETUP, H.225.0, VoIP Q.931, ISDN.
SETUP IP , alias, . Alias e-mail , , , , : alex@merionet.ru 192.168.1.32@merionet.ru .
2 CALL PROCEEDING, , . , 2 , ARQ ACF. , H.225 (Q.931 ) 2 ALERTING. .
H.245, FACILITY H.225.0.
H.245 :
- (Master/Slave Determination).
- (Terminal Capability Set)
- (Open Logical Channel)
. - (Master) .
. .
RTP .
2 , CONNECT. .
RTP/RTCP .
2 , CloseLogicalChannel EndSessionCommand, CLC ACK ESC ACK 1. H.225.0 RELEASE COMPLETE. , RAS, DRQ Disenagae Request. Disengage Confirmation.
H.323 IP , VoIP.