end user data

database get TL will probably show you more than you ever wanted to know.

The poor man's way to put stuff in the database from outside is

asterisk -rx 'database put {tree} {key} "{data to put in db}"'

A better way is to log into the Manager interface and use the DBPut action.

DBput and DBget are depreciated and dont exist in 1.4 and 1.6. Instead use the DB function

Set(${DB(family/key)}=value)

to call the value just use the function.. for example the zero-out extension for voicemail

exten => o,1,Goto(from-inside,${DB(family/key)},1)

I was refering to the Manager API, not the dialplan. I was assuming he was doing something from an outside script, but maybe I assumed too much. Yeah, if you're doing it from the dialplan, the functions are what eeman said. :)