asterisk users - Feb 2006 - What are these error messages in my logs?

Hello,
I am getting a bizzare amount of error messages in the log files.
The system seems to be running fine...no one is reporting any issues and all
calls are coming and going.
System is showing higher than average memory usage.
eth0 is showing a high number of errors 

Running v1.1
Has happened on older versions and have been seeing this for quite some time but
have just now asked if anyone knows what is going on.
Could not find anything in wiki about it.

Thanks for any comments.

debug below:

Feb 22 14:33:41 DEBUG[18472] chan_sip.c: Stopping retransmission on
'66e4b8f740ed59854ec8ae8433a6ad26@SERVERIP' of Request 102: Match Found
Feb 22 14:33:44 DEBUG[18472] chan_sip.c: Stopping retransmission on
'7b368486033d0bb26bda565f6998c58b@SERVERIP' of Request 102: Match Found
Feb 22 14:33:44 DEBUG[18472] chan_sip.c: Stopping retransmission on
'021306be3685efc9298178275e31196c@SERVERIP' of Request 102: Match Found
Feb 22 14:33:46 DEBUG[18472] chan_sip.c: Stopping retransmission on
'796d32f740a2a2830f50ae74163a40a2@SERVERIP' of Request 102: Match Found
Feb 22 14:33:54 DEBUG[18472] chan_sip.c: Auto destroying call
'3dd1fe1b8c9121323dd6282f05a59f16@phoneIP'
Feb 22 14:33:54 DEBUG[18472] chan_sip.c: Auto destroying call
'26e165331719b4a656be095bd8b2b80e@phoneIP'
Feb 22 14:33:55 DEBUG[18472] chan_sip.c: Stopping retransmission on
'3e5ecb451b69ff4c4a95bd95750bf1d6@SERVERIP' of Request 102: Match Found

and it just continues on and on