H.323 Call Flow - EventHelix.com
H.323 Call Flow - EventHelix.com
H.323 Call Flow - EventHelix.com
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<strong>H.323</strong> <strong>Call</strong> Setup (<strong>H.323</strong> <strong>Call</strong> Setup Involving H.224, Q.931, H.245, RTP and RTCP Protocols)<br />
<strong>Call</strong>ed PC Internet <strong>Call</strong>er PC<br />
<strong>Call</strong>ed <strong>Call</strong>ed Segment <strong>Call</strong>er Segment <strong>Call</strong>er<br />
<strong>Call</strong>ed<br />
<strong>Call</strong>ed H225<br />
Port<br />
<strong>Call</strong>ed H245<br />
Port<br />
<strong>Call</strong>ed RTP<br />
Port<br />
<strong>Call</strong>ed RTCP<br />
Port<br />
<strong>Call</strong>er RTCP<br />
Port<br />
Real-Time Transport Protocol<br />
Payload type: ITU-T G .711 PCMA,<br />
Synchronization Source identifier: 3739283087,<br />
Sequence number: 59134,<br />
Timestamp: 480<br />
<strong>Call</strong>er RTP<br />
Port<br />
<strong>Call</strong>er H245<br />
Port<br />
<strong>Call</strong>er H225<br />
Port<br />
<strong>Call</strong>er<br />
<strong>EventHelix</strong>.<strong>com</strong>/EventStudio 2.5<br />
18-Dec-05 08:29 (Page 4)<br />
Voice<br />
Real-Time Transport Protocol<br />
Real-Time Transport Protocol<br />
Real-Time Transport Protocol<br />
Payload type: ITU-T G.711 PCMA,<br />
Synchronization Source identifier: 3739283087,<br />
Sequence number: 59138,<br />
Timestamp: 1440<br />
Real-Time Transport Protocol<br />
Real-Time Transport Protocol<br />
Real-Time Transport Protocol<br />
Real-Time Transport Protocol<br />
Real-Time Transport Control Protocol<br />
Reception report count: 0,<br />
Packet type: Source description<br />
(202),<br />
Sender SSRC: 4090175489,<br />
Identifier: 4090175489,<br />
RTP timestamp: 37920,<br />
Sender's packet count: 158,<br />
Sender's octet count: 39816,<br />
Source count: 1,<br />
Packet type: Source description<br />
(202)<br />
Real-Time Transport Protocol<br />
Real-Time Transport Protocol<br />
Real-Time Transport Protocol<br />
Real-Time Transport Protocol<br />
Real-Time Transport Protocol<br />
Voice<br />
Voice from called party is <strong>com</strong>pressed<br />
and transmitted in RTP packets to the<br />
caller.<br />
The calling party de<strong>com</strong>presses the<br />
voice.<br />
An RTCP packet is transmitted to<br />
monitor the quality of the RTP path.<br />
These statistics are used to adjust the<br />
buffering and transmission of RTP<br />
packets.
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