Text in Asterisk

• Console channels support text receiving (shows up on the console) and sending (using the 'show text' CLI command).
• Zap channels support text communications when in TDD mode (using the tdd mode AGI command). This allows communications between Asterisk and TTY/TDD devices.
• SIP Supports text messaging during a call, but not outside of a call.
• IAX
• SCCP (with chan_sccp2)

• receive char Receive one character of text on a channel, and discard any other characters waiting.
• receive text Receive a string of text on a channel.
• send text Send text on a channel.
• tdd mode Set a Zap channel to TDD mode, for communication with TTY/TDD devices.

See also

• Asterisk cmd SendText