Cisco IP Telephony Troubleshooting Guide for Cisco CallManager Release 3.0(1)
© 2000 Cisco Systems, Inc.
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16:05:45.140 CCM|StationD - stationOutputOpenReceiveChannel tcpHandle=0x4fbbc30 myIP: e74610ac
(172.16.70.231)
16:05:45.140 CCM|StationD - ConferenceID: 0 msecPacketSize: 20
compressionType:(4)Media_Payload_G711Ulaw64k
Similarly, Cisco CallManager provides information to the called party (1000).
16:05:45.140 CCM|StationD - stationOutputOpenReceiveChannel tcpHandle=0x4fbb150 myIP: e64610ac
(172.16.70.230)
16:05:45.140 CCM|StationD - ConferenceID: 0 msecPacketSize: 20
compressionType:(4)Media_Payload_G711Ulaw64k
Cisco CallManager has received the acknowledgment message from called party for establishing
the open channel for RTP stream, as well as the IP address of the called party. This message is to
inform the Cisco CallManager of two pieces of information about the Skinny Station. First, it
contains the status of the open action. Second, it contains the receive port address and number for
transmission to the remote end. The IP address of the transmitter (calling part) of the RTP stream
is ipAddr, and PortNumber is the IP port number of the RTP stream transmitter (calling party).
16:05:45.265 CCM|StationInit - InboundStim - StationOpenReceiveChannelAckID tcpHandle=0x4fbb150,
Status=0, IpAddr=0xe64610ac, Port=17054, PartyID=2
The following messages are used by Cisco CallManager to order the station to begin transmitting
the audio stream to the indicated remote Cisco IP Phone’s IP address and port number.
16:05:45.265 CCM|StationD - stationOutputStartMediaTransmission tcpHandle=0x4fbbc30 myIP:
e74610ac (172.16.70.231)
16:05:45.265 CCM|StationD - RemoteIpAddr: e64610ac (172.16.70.230) RemoteRtpPortNumber: 17054
msecPacketSize: 20 compressionType:(4)Media_Payload_G711Ulaw64k
In the following traces, the previously explained messages are sent to the called party. These
messages are followed by the messages indicating the RTP media stream has been started
between the called and calling party.
16:05:45.312 CCM|StationD - stationOutputStartMediaTransmission tcpHandle=0x4fbb150 myIP:
e64610ac (172.16.70.230)
16:05:45.328 CCM|StationD - RemoteIpAddr: e74610ac (172.16.70.231) RemoteRtpPortNumber: 18448
msecPacketSize: 20 compressionType:(4)Media_Payload_G711Ulaw64k
16:05:46.203 CCM|StationInit - InboundStim - OnHookMessageID tcpHandle=0x4fbbc30
The calling party’s Cisco IP Phone finally goes on-hook, which terminates all the control
messages between the Skinny Station and Cisco CallManager as well as the RTP stream between
Skinny Stations.
16:05:46.203 CCM|StationInit - InboundStim - OnHookMessageID tcpHandle=0x4fbbc30
