You have to have a seperate CDR device to get the call details. OTM has an option for this, or a stand alone PC connected to one of the serial ports. There are a few vendors that provide this, but the cheap easy way is the PC with Procomm capturing the data.
The PBX itself does not store any call info.
JohnThePhoneGuy
"If I can't fix it, it's not broke!