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Table 2-1. Popular dialplan applications
Name
app_authenticate
app_cdr
app_chanspy
app_confbridge
app_dial
Purpose
Compares dual-tone multifrequency (DTMF) input against a provided string (password)
Writes ad hoc record to CDR
Allows a channel to listen to audio on another channel
Provides conferencing
Used to connect channels together (i.e., make phone calls)
app_directed_pickup Answers a call that’s ringing at another extension
2 This is a command that is available as part of the installation process. We will discuss the use of menuselect in
the installation chapter.
Modules
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11
Name
app_directory
app_dumpchan
app_echo
app_exec
app_mixmonitor
app_originate
app_page
Purpose
Presents the list of names from voicemail.conf
Dumps channel variables to Asterisk command-line interface (CLI)
Echos received audio back to source channel (can be helpful in demonstrating latency)
Contains Exec(), TryExec(), and ExecIf(): executes a dialplan application
conditionally
Records both sides of a call (transmit and receive) and mixes them together into a single file
Allows dialplan logic to originate a call (as opposed to a call coming in on a channel)
Creates multiple audio connections to specified devices for public address (paging)
app_parkandannounce Enables automated announcing of parked calls
app_playback
app_playtones
app_queue
app_read
app_readexten
app_record
app_senddtmf
app_stack
app_stasis
app_system
app_transfer
app_voicemail
app_while
Plays a file to the channel (does not accept input)
Plays pairs of tones of specified frequencies (DTMF mostly)
Provides Automatic Call Distribution (ACD)
Requests input of digits from callers and assigns input to a variable
Requests input of digits from callers and passes call to a designated extension and context
Records received audio to a file
Transmits DTMF to calling party
Provides GoSub(), GoSubIf(), Return(), StackPop(), LOCAL(), and
LOCAL_PEEK()
Passes call control to an ARI application—many Asterisk developers use this one application,
and from there handle all the rest of their development outside of the Asterisk dialplan
Executes commands in a Linux shell
Performs a transfer on the current channel
Provides voicemail
Includes While(), EndWhile(), ExitWhile(), and ContinueWhile(); provides