any idea why i would be seeing this

96.41.96.184 200-213256 78e810fd1ae 00102/00000 0x0 (nothing) No Init: NOTIFY

47 active SIP channels

it is repeated about 40 or 50 times when i look at pbx information
i know who it is and they are using a X-Lite phone ( free version ) and their computer is now turned off for about an hour and i still get it