Asterisk -- An Open Source Telephony Toolkit
Extension and device states in Asterisk
Asterisk Language Syntaxes supported
Asterisk Developer's Documentation - appendices
The Generic Speech Recognition API
ARA - The Asterisk Realtime Interface
CDR - Call Data Records and billing
README - the general administrator introduction
Globally predefined channel variables
Followme: An application for simple follow-me calls
Extensions.conf - the Dial Plan
H.323 channel driver information
Manager CDR driver configuration
PostgreSQL CDR driver configuration
SQLite CDR driver configuration
FreeTDS CDR driver configuration
ACD - Queue system configuration
Meetme - The conference bridge configuration
AST Multimedia and signalling frames
Asterisk thread locking models
The Asterisk Module management interface
The Asterisk Thread Storage API