Asterisk from Scratch: What you need to know about Asterisk - Session 3 - AstriCon 2014
Asterisk from Scratch is the 2014 edition of the wildly popular Asterisk 1-2-3 Seminar. It is intended to be a well-rounded and informative overview of the Asterisk Project, with a focus on the essentials a general Asterisk "newbie" should know.
Session 3:
Connecting SIP phones to Asterisk
Dialing phones from the dialplan
Dialplan application
Voicemail
Dial-by-name directories
Auto-attendants, IVRs, and Voice menus
Recording audio prompts
Audio conferencing