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Naveen Albert 0a46be95cb res_tonedetect: Add option for TONE_DETECT detection to auto stop.
One of the problems with TONE_DETECT as it was originally written
is that if a tone is detected multiple times, it can trigger
the redirect logic multiple times as well. For example, if we
do an async goto in the dialplan after detecting a tone, because
the detector is still active until explicitly disabled, if we
detect the tone again, we will branch again and start executing
that dialplan a second time. This is rarely ever desired behavior,
and can happen if the detector is not removed quickly enough.

Add a new option, 'e', which automatically disables the detector
once the desired number of matches have been heard. This eliminates
the potential race condition where previously the detector would
need to be disabled immediately, but doing so quickly enough
was not guaranteed. This also allows match criteria to be retained
longer if needed, so the detector does not need to be destroyed
prematurely.

Resolves: #1390

UserNote: The 'e' option for TONE_DETECT now allows detection to
be disabled automatically once the desired number of matches have
been fulfilled, which can help prevent race conditions in the
dialplan, since TONE_DETECT does not need to be disabled after
a hit.
2025-09-03 14:23:45 +00:00
.github .github: Update Releaser to use SES email 2025-08-20 12:02:26 -06:00
addons chan_mobile: decrease CHANNEL_FRAME_SIZE to prevent delay 2024-08-12 21:21:30 +00:00
agi chan_alsa: Remove deprecated module. 2022-12-09 08:26:42 -07:00
apps app_queue: fix comparison for announce-position-only-up 2025-09-03 13:15:55 +00:00
autoconf Add C++ Standard detection to configure and fix a new C++20 compile issue 2025-01-06 19:08:23 +00:00
bridges bridge_softmix: Fix queueing VIDUPDATE control frames 2024-07-19 16:47:12 +00:00
build_tools res_srtp: Add menuselect options to enable AES_192, AES_256 and AES_GCM 2025-08-06 15:40:02 +00:00
cdr docs: Fix typos in cdr/ 2025-02-20 21:49:11 +00:00
cel docs: Indent <since> tags. 2025-01-29 14:18:25 +00:00
channels sig_analog: Skip Caller ID spill if usecallerid=no. 2025-08-27 15:10:54 +00:00
codecs Reduce startup/shutdown verbose logging 2024-02-12 18:46:32 +00:00
configs sorcery: Prevent duplicate objects and ensure missing objects are created on update 2025-08-27 16:56:19 +00:00
contrib safe_asterisk: Add ownership checks for /etc/asterisk/startup.d and its files. 2025-07-31 14:06:31 +00:00
doc documentation: Update Gosub, Goto, and add new documentationtype. 2025-03-18 15:12:08 +00:00
formats format_gsm.c: Added mime type 2024-12-10 13:25:08 +00:00
funcs func_frame_drop: Add debug messages for dropped frames. 2025-08-15 16:47:56 +00:00
images
include sorcery: Prevent duplicate objects and ensure missing objects are created on update 2025-08-27 16:56:19 +00:00
main sorcery: Prevent duplicate objects and ensure missing objects are created on update 2025-08-27 16:56:19 +00:00
menuselect menuselect: Fix GTK menu callbacks for Fedora 42 compatibility 2025-05-19 13:17:27 +00:00
pbx pbx_lua.c: segfault when pass null data to term_color function 2025-08-15 16:00:25 +00:00
phoneprov res_phoneprov add snom 300, 320, 360, 370, 820, 821, 870 support 2011-02-03 16:13:40 +00:00
res res_tonedetect: Add option for TONE_DETECT detection to auto stop. 2025-09-03 14:23:45 +00:00
rest-api ARI: Add command to indicate progress to a channel 2025-08-18 16:29:53 +00:00
rest-api-templates ARI: REST over Websocket 2025-04-02 12:16:41 +00:00
sounds sounds: Update download URL to use HTTPS. 2023-06-05 12:43:45 -06:00
static-http Remove as much trailing whitespace as possible. 2017-12-22 09:23:22 -05:00
tests sorcery: Prevent duplicate objects and ensure missing objects are created on update 2025-08-27 16:56:19 +00:00
third-party bundled_pjproject: Avoid deadlock between transport and transaction 2025-07-03 14:34:13 +00:00
utils options: Change ast_options from ast_flags to ast_flags64. 2025-07-30 16:04:01 +00:00
.cleancount Remove obsolete struct ast_channel note. 2012-06-29 16:42:32 +00:00
.gitignore build: Refactor the earlier "basebranch" commit 2022-02-28 07:51:41 -06:00
bootstrap.sh BuildSystem: Bump autotools versions on OpenBSD. 2024-01-30 19:06:06 +00:00
BSDmakefile Merged revisions 285090 via svnmerge from 2010-09-06 06:57:18 +00:00
BUGS general: Fix broken links. 2023-12-08 13:11:54 +00:00
config.guess Update config.guess and config.sub 2025-03-28 15:29:19 +00:00
config.sub Update config.guess and config.sub 2025-03-28 15:29:19 +00:00
configure res_pjproject: Fix DTLS client check failing on some platforms 2025-04-21 14:46:02 +00:00
configure.ac res_pjproject: Fix DTLS client check failing on some platforms 2025-04-21 14:46:02 +00:00
COPYING
CREDITS CREDITS: Spelling fixes 2021-11-16 06:00:57 -06:00
default.exports Add _IO_stdin_used in version-script to fix SIGBUSes on Sparc. 2013-08-22 08:26:55 +00:00
install-sh Remove as much trailing whitespace as possible. 2017-12-22 09:23:22 -05:00
LICENSE LICENSE: Update company name, email, and address. 2025-01-23 15:43:42 +00:00
Makefile Alternate Channel Storage Backends 2025-05-07 16:47:06 +00:00
Makefile.moddir_rules Makefile.moddir_rules: Pass PJPROJECT_BUNDLED to download_externals 2019-03-12 12:28:08 -06:00
Makefile.rules chan_sip: Remove deprecated module. 2023-01-03 09:00:42 -06:00
makeopts.in Add libjwt to third-party 2023-10-05 10:34:46 -06:00
missing
mkinstalldirs
README-addons.txt README*: Remove trailing whitespace 2015-08-22 00:37:23 -04:00
README-SERIOUSLY.bestpractices.md general: Fix broken links. 2023-12-08 13:11:54 +00:00
README.md README.md: Updates and Fixes 2025-03-13 13:15:15 +00:00
sample.call Remove as much trailing whitespace as possible. 2017-12-22 09:23:22 -05:00
SECURITY.md SECURITY.md: Update with correct documentation URL 2023-11-09 11:45:08 -07:00
Zaptel-to-DAHDI.txt build: Remove obsolete leftover build references. 2022-03-30 17:10:51 -05:00

The Asterisk(R) Open Source PBX

By Mark Spencer <markster@digium.com> and the Asterisk.org developer community.
Copyright (C) 2001-2025 Sangoma Technologies Corporation and other copyright holders.

SECURITY

It is imperative that you read and fully understand the contents of the security information document before you attempt to configure and run an Asterisk server.

See Important Security Considerations for more information.

WHAT IS ASTERISK ?

Asterisk is an Open Source PBX and telephony toolkit. It is, in a sense, middleware between Internet and telephony channels on the bottom, and Internet and telephony applications at the top. However, Asterisk supports more telephony interfaces than just Internet telephony. Asterisk also has a vast amount of support for traditional PSTN telephony, as well.

For more information on the project itself, please visit the Asterisk Home Page and the official Asterisk Documentation.

SUPPORTED OPERATING SYSTEMS

Linux

The Asterisk Open Source PBX is developed and tested primarily on the GNU/Linux operating system, and is supported on every major GNU/Linux distribution.

Others

Asterisk has also been 'ported' and reportedly runs properly on other operating systems as well, Apple's Mac OS X, and the BSD variants.

GETTING STARTED

Most users are using VoIP/SIP exclusively these days but if you need to interface to TDM or analog services or devices, be sure you've got supported hardware.

Supported telephony hardware includes:

  • All Analog and Digital Interface cards from Sangoma
  • Any full duplex sound card supported by PortAudio
  • The Xorcom Astribank channel bank

UPGRADING FROM AN EARLIER VERSION

If you are updating from a previous version of Asterisk, make sure you read the Change Logs.

Change Logs

NEW INSTALLATIONS

Ensure that your system contains a compatible compiler and development libraries. Asterisk requires either the GNU Compiler Collection (GCC) version 4.1 or higher, or a compiler that supports the C99 specification and some of the gcc language extensions. In addition, your system needs to have the C library headers available, and the headers and libraries for ncurses.

There are many modules that have additional dependencies. To see what libraries are being looked for, see ./configure --help, or run make menuselect to view the dependencies for specific modules.

On many distributions, these dependencies are installed by packages with names like 'glibc-devel', 'ncurses-devel', 'openssl-devel' and 'zlib-devel' or similar. The contrib/scripts/install_prereq script can be used to install the dependencies for most Debian and Redhat based Linux distributions. The script also handles SUSE, Arch, Gentoo, FreeBSD, NetBSD and OpenBSD but those distributions mightnoit have complete support or they might be out of date.

So, let's proceed:

  1. Read the documentation.
    The Asterisk Documentation website has full information for building, installing, configuring and running Asterisk.

  2. Run ./configure
    Execute the configure script to guess values for system-dependent variables used during compilation. If the script indicates that some required components are missing, you can run ./contrib/scripts/install_prereq install to install the necessary components. Note that this will install all dependencies for every functionality of Asterisk. After running the script, you will need to rerun ./configure.

  3. Run make menuselect
    This is needed if you want to select the modules that will be compiled and to check dependencies for various optional modules.

  4. Run make
    Assuming the build completes successfully:

  5. Run make install
    If this is your first time working with Asterisk, you may wish to install the sample PBX, with demonstration extensions, etc. If so, run:

  6. Run make samples
    Doing so will overwrite any existing configuration files you have installed.

  7. Finally, you can launch Asterisk in the foreground mode (not a daemon) with asterisk -vvvc
    You'll see a bunch of verbose messages fly by your screen as Asterisk initializes (that's the "very very verbose" mode). When it's ready, if you specified the "c" then you'll get a command line console, that looks like this:
    *CLI>
    You can type core show help at any time to get help with the system. For help with a specific command, type core show help <command>.

man asterisk at the Unix/Linux command prompt will give you detailed information on how to start and stop Asterisk, as well as all the command line options for starting Asterisk.

ABOUT CONFIGURATION FILES

All Asterisk configuration files share a common format. Comments are delimited by ; (since # of course, being a DTMF digit, may occur in many places). A configuration file is divided into sections whose names appear in []'s. Each section typically contains statements in the form variable = value although you may see variable => value in older samples.

SPECIAL NOTE ON TIME

Those using SIP phones should be aware that Asterisk is sensitive to large jumps in time. Manually changing the system time using date(1) (or other similar commands) may cause SIP registrations and other internal processes to fail. For this reason, you should always use a time synchronization package to keep your system time accurate. All OS/distributions make one or more of the following packages available:

  • ntpd/ntpsec
  • chronyd
  • systemd-timesyncd

Be sure to install and configure one (and only one) of them.

FILE DESCRIPTORS

Depending on the size of your system and your configuration, Asterisk can consume a large number of file descriptors. In UNIX, file descriptors are used for more than just files on disk. File descriptors are also used for handling network communication (e.g. SIP, IAX2, or H.323 calls) and hardware access (e.g. analog and digital trunk hardware). Asterisk accesses many on-disk files for everything from configuration information to voicemail storage.

Most systems limit the number of file descriptors that Asterisk can have open at one time. This can limit the number of simultaneous calls that your system can handle. For example, if the limit is set at 1024 (a common default value) Asterisk can handle approximately 150 SIP calls simultaneously. To change the number of file descriptors follow the instructions for your system below:

PAM-BASED LINUX SYSTEM

If your system uses PAM (Pluggable Authentication Modules) edit /etc/security/limits.conf. Add these lines to the bottom of the file:

root            soft    nofile          4096
root            hard    nofile          8196
asterisk        soft    nofile          4096
asterisk        hard    nofile          8196

(adjust the numbers to taste). You may need to reboot the system for these changes to take effect.

GENERIC UNIX SYSTEM

If there are no instructions specifically adapted to your system above you can try adding the command ulimit -n 8192 to the script that starts Asterisk.

MORE INFORMATION

Visit the Asterisk Documentation website for more documentation on various features and please read all the configuration samples that include documentation on the configuration options.

Finally, you may wish to join the Asterisk Community Forums

Welcome to the growing worldwide community of Asterisk users!

        Mark Spencer, and the Asterisk.org development community

Asterisk is a trademark of Sangoma Technologies Corporation

[Sangoma](https://www.sangoma.com/)
[Home Page](https://www.asterisk.org)
[Support](https://www.asterisk.org/support)
[Documentation](https://docs.asterisk.org)
[Community Forums](https://community.asterisk.org)
[Release Notes](https://github.com/asterisk/asterisk/releases)
[Security](https://docs.asterisk.org/Deployment/Important-Security-Considerations/)
[Mailing List Archive](https://lists.digium.com)