http://www.freepbx.org/support/documentation/module-documentation/custom-extension-and-destinations

Part 1: http://mbrevda.blogspot.com/2008/10/miscellaneouscustom-applicationextensio.html

Part 2: http://mbrevda.blogspot.com/2008/10/miscellaneouscustom-applicationextensio_16.html

Verify the Custom Applications and Misc Applications modules are installed.

When adding custom apps, you can take one of two paths:

• Simply add lines to /etc/asterisk/extensions_custom.conf
  • Use the context [from-internal-custom]
  • Probably best only for very small apps
• Create a new context, then include it in [from-internal-custom]
  • Probably the best method for larger apps
  • This is what is shown here

The following example creates an extension to play music on hold.

First, we need to manually add your new custom context into /etc/asterisk/extensions_custom.conf. To do that, we use the OS console or SSH into the PBX:

ssh -l root pbx

nano /etc/asterisk/extensions_custom.conf

[from-internal-custom]
include => play-moh-blues                       ; play moh class (blues)
include => play-moh-latin                       ; play moh class (latin)

; play-moh-blues,s,1 can be used as a custom application
[play-moh-blues]
exten => s,1,Answer
exten => s,2,MusicOnHold(blues)
exten => s,3,Hangup

See /etc/asterisk/extensions_custom.conf.sample or Google for ideas:

more /etc/asterisk/extensions_custom.conf.sample

Second, we create a Custom Destination for our custom app to make the context available in other menus.

Admin → Custom Destinations

Finally, we create a Miscellaneous Application:

Applications → Misc Applications

Don't forget to click Apply to reload the Asterisk configuration.

The new custom app will now appear on the Feature Code Admin page.

Note that if you follow the above procedure, this is not necessary.

There are times when you will want to reserve an extension from FreePBX to prevent FreePBX from duplicating an extension that you already assigned manually. For that, we use the Custom Extension module:

Admin → Custom Extensions

If you need to play custom sounds or greetings, you need to record them first:

Admin → System Recordings

Recorded announcements are stored here:

/var/lib/asterisk/sounds/custom/

and can be referenced in custom apps like this:

./custom/announcement-name.wav

List extensions:

rasterisk -x 'sip show peers'|egrep "^1[0-9]*.*OK.*"|cut -d '/' -f1