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Your First Working Asterisk Dialplan

Register two PJSIP endpoints, write a minimal dialplan, and make internal calls between phones. Step-by-step from a fresh Asterisk install to two exte...

Guides pjsip dialplan beginner
VOLUME()

The VOLUME function can be used to increase or decrease the 'tx' or 'rx' gain of any channel. Asterisk dialplan function reference.

Reference function dialplan
VM_INFO()

Returns the selected attribute from the specified mailbox. If context is not specified, defaults to the 'default' context.

Reference function dialplan
VMCOUNT()

Count the voicemails in a specified mailbox or mailboxes.

Reference function dialplan
VERSION()

Return the current Asterisk version string, or compare it against a specified version using standard operators. Useful for writing dialplan logic that...

Reference function dialplan
VARIABLE_EXISTS()

Check if a dialplan variable exists or not.

Reference function dialplan
VALID_EXTEN()

Returns a true value if the indicated context, extension, and priority exist. This function has been deprecated in favor of the 'DIALPLAN\_EXISTS()'.

Reference function dialplan
URIENCODE()

Encodes a string to URI-safe encoding according to RFC 2396.

Reference function dialplan
URIDECODE()

Decodes a URI-encoded string according to RFC 2396.

Reference function dialplan
UNSHIFT()

Inserts one or more values to the beginning of a variable containing delimited text

Reference function dialplan
UNLOCK()

Unlocks a previously locked mutex. Returns '1' if the channel had a lock or '0' otherwise. Asterisk dialplan function reference.

Reference function dialplan
TXTCIDNAME()

Looks up the given phone number in DNS to retrieve the caller id name. The result will either be blank or be the value found in the TXT record in DNS.

Reference function dialplan
TRYLOCK()

Attempt to obtain a named mutex.

Reference function dialplan
TRIM()

Trim leading and trailing whitespace in a string

Reference function dialplan
TOUPPER()

Convert a string to uppercase in the Asterisk dialplan. Useful for normalizing input before pattern matching or display formatting.

Reference function dialplan
TONE_DETECT()

Asynchronously detects a tone

Reference function dialplan
TOLOWER()

Convert a string to lowercase in the Asterisk dialplan. Useful for normalizing input before pattern matching or database lookups.

Reference function dialplan
TESTTIME()

Sets a time to be used with the channel to test logical conditions.

Reference function dialplan
TALK_DETECT()

Raises notifications when Asterisk detects silence or talking on a channel.

Reference function dialplan
SYSINFO()

Returns system information specified by parameter.

Reference function dialplan
STRREPLACE()

Replace instances of a substring within a string with another string.

Reference function dialplan
STRPTIME()

Returns the epoch of the arbitrary date/time string structured as described by the format.

Reference function dialplan
STRFTIME()

Returns the current date/time in the specified format.

Reference function dialplan
STRBETWEEN()

Inserts a substring between each character in a string.

Reference function dialplan
STIR_SHAKEN()

Gets the number of STIR/SHAKEN results or a specific STIR/SHAKEN value from a result on the channel.

Reference function dialplan