Cisco OL-9420-01 - Manual (Page 8)

A-8
Troubleshooting Guide for Cisco Unified CallManager Release 5.0(2)
OL-9420-01
Appendix A Case Study: Troubleshooting Cisco Unified IP Phone Calls
Troubleshooting Intracluster Cisco Unified IP Phone Calls
At this point, the called party’s Cisco Unified IP Phone goes off hook; therefore,
Cisco Unified CallManager stops generating the ringer tone to calling party.
16:05:45.140 CCM|StationD - stationOutputStopTone tcpHandle=0x4fbbc30
In the following messages, Cisco Unified CallManager causes the Skinny Station to begin receiving a
Unicast RTP stream. To do so, Cisco Unified CallManager provides the IP address of the called party as
well as codec information and packet size in msec (milliseconds). PacketSize designates an integer that
contains the sampling time, in milliseconds, that is used to create the RTP packets.
Note Normally this value gets set to 30 msec. In this case, it is set to 20 msec.
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 Unified 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 Unified 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
informs the Cisco Unified 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
Cisco Unified CallManager uses the following messages to order the station to begin transmitting the
audio and video streams to the indicated remote Cisco Unified IP Phone 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
16:03:25.328 CCM|StationD(1): TCPPid=[1.100.117.1] OpenMultiReceiveChannel
conferenceID=16777217 passThruPartyID=1000011 compressionType=101(Media_Payload_H263)
qualifierIn=?. myIP: e98e6b80 (128.107.142.233)|<CT::1,100,11,1.1><IP::><DEV::>
16:03:25.375 CCM|StationInit: TCPPid=[1.100.117.1] StationOpenMultiMediaReceiveChannelAck
Status=0, IpAddr=0xe98e6b80, Port=65346,
PartyID=16777233|<CT::1,100,105,1.215><IP::128.107.142.233>
16:03:25.375 CCM|StationD(2): TCPPid = [1.100.117.2]
star_StationOutputStartMultiMediaTransmission conferenceID=16777218
passThruPartyID=16777250 remoteIpAddress=e98e6b80(66.255.0.0) remotePortNumber=65346
compressType=101(Media_Payload_H263) qualifierOut=?. myIP: e98e6b80
(128.107.142.233)|<CT::1,100,105,1.215><IP::128.107.142.233>
In the following traces, the previously explained messages are sent to the called party. The messages that
indicate that the RTP media stream has been started between the called and calling party, follow these
messages.