"Asterisk-Acc-Code", The account name of detail records "Asterisk-CidName", "Asterisk-CidNum", "Asterisk-Cidani", "Asterisk-Cidrdnis", "Asterisk-Ciddnid", "Asterisk-Exten", "Asterisk-Context", The destination context "Asterisk-Channame", The channel name "Asterisk-Appname", Last application run on the channel "Asterisk-App-Data", Argument to the last channel "Asterisk-Event-Time", "Asterisk-Event-Type", "Asterisk-AMA-Flags", DOCUMENTATION, BILL, IGNORE etc, specified on a per channel basis like accountcode. "Asterisk-Unique-ID", Unique call identifier "Asterisk-User-Field" User field set via SetCELUserField "Asterisk-Peer" Name of the Peer for 2-channel events (like bridge)