Call Forwarding

Add call forwarding to your dialplan

Asterisk as a softphone

Asterisk with chan_oss == powerful softphone (IAX, H323, SIP...)

Internal dialtones with PlayTones()

Annoy your users with custom dialtones

Callback

Keep your mobile phone bill low

Call Deflection

Forward calls with app_capiCD without using B channels

Incoming IAXtel problems

Let your friends call you

chan_capi

a Common ISDN API 2.0 driver for Asterisk

Digium

The home of Asterisk

Asterisk.org

The place to start with the Asterisk handbook

VoIP-Info.org

More than you ever wanted to know about VoIP and Asterisk