h323信令分析
h323信令分析
信令分析环境：
客户端使用OpenPhone 3.10.4。
网守使用GunGatekeeper 3.4
抓包工具：WireSharek 1.10.1
无GK的两个终端间的慢速呼叫信令建立过程
两台终端之间不通过GK注册认证而直接发起呼叫的信令。呼叫中首先发起H.225.0的呼叫控制信令，即Q.931信令；然后发起H.245逻辑信道建立信令；最后是RTP媒体流的建立。
抓包分析：
No. Time Source Destination ProtocolLength Info
848 63.261064 192.165.56.95 192.165.56.98 H.225.0 240 CS: setup
849 63.262290 192.165.56.98 192.165.56.95 H.225.0 179 CS: callProceeding
852 63.285973 192.165.56.98 192.165.56.95 H.225.0 177 CS: alerting
927 65.909024 192.165.56.98 192.165.56.95 H.225.0 205 CS: connect
931 65.915804 192.165.56.98 192.165.56.95 H.245 1124 terminalCapabilitySet
932 65.916128 192.165.56.98 192.165.56.95 H.245 65 masterSlaveDetermination
934 65.986018 192.165.56.95 192.165.56.98 H.245 184 terminalCapabilitySet
935 65.986064 192.165.56.95 192.165.56.98 H.245 65 masterSlaveDetermination
937 65.987613 192.165.56.98 192.165.56.95 H.245 61 terminalCapabilitySetAck
938 65.987799 192.165.56.98 192.165.56.95 H.245 60 masterSlaveDeterminationAck
940 65.996350 192.165.56.95 192.165.56.98 H.245 61 terminalCapabilitySetAck
941 65.996838 192.165.56.95 192.165.56.98 H.245 60 masterSlaveDeterminationAck
945 66.121657 192.165.56.98 192.165.56.95 H.245 78 openLogicalChannel (g711U)
952 66.167901 192.165.56.95 192.165.56.98 H.245 83 openLogicalChannelAck
1102 71.090521 192.165.56.95 192.165.56.98 H.245 60 endSessionCommand
1103 71.090596 192.165.56.95 192.165.56.98 H.225.0 109 CS: releaseComplete
1104 71.091477 192.165.56.98 192.165.56.95 H.245 60 endSessionCommand
1105 71.091536 192.165.56.98 192.165.56.95 H.225.0 109 CS: releaseComplete