The system does not store this information, however, you can build your own CDR simply by adding a PC with procomm and capture that data. Connect your PC to a TTY port and program it. you will have to manually stop the capture and restart it on whatever basis you are comfortable with, ie daily routines are a good place for that to be included, create a new file each day for the capture, or weekly if you dont have alot of calls etc.
JohnThePhoneGuy
"If I can't fix it, it's not broke!