The Callback module allows you to setup a destination that calls a user back and provides them access to an application. An example of this would be a caller that dials your system, disconnects, and is called back and then provided a DISA
dial-tone to make a phone call.

Add Callback

• Callback Description: This is the name/description of the callback
• Callback Number: This is the number to be called
• Delay Before Callback: Optionally, you can enter an amount of time that the system should wait before placing the call

Known Issues

Some issues have been encountered with this plugin:

1. Callbacks frequently fail, as it appears Asterisk disconnects
   before the associated callback PHP script (located in
   /var/lib/asterisk/bin) may complete the callback transaction.
2. If one uses the 'CLI' callback capability, then you may
   encounter issues with being able to actually dial people back. The
   reason for this is that the telco only provides a 10-digit CLI, and if
   your provider requires you to add a '1' there is no way to do this
   without hacking the plug-in. Further, if your own dialplan requires an
   access code like '9' you also encounter this problem.
3. There is no way to provide a number of retries, retry time or
   wait times for an answer. This app will try once, and if it fails, will
   not try again.

Alternative Solution

A replacement script, written in Ruby, has been created to replace
the /var/lib/asterisk/bin/callback PHP script provided with the
callback plugin. The Ruby script takes a different approach to
providing the callback capability, while still supported the HTML form
provided with the plug-in with FreePBX. The enhancements are:

- Provides the ability to set the access code to prepend to the recognized CLI number for a callback

- Uses call files instead of the Manager API

- Allows one to set the number of retries, the retry wait time and the wait time for a caller to pickup an attempt

To use the script below do the following:

(Note: This script requires that Ruby 1.8.x be installed on your Asterisk/FreePBX system)

1. Move /var/lib/asterisk/bin/callback to /var/lib/asterisk/bin/callback.original (to back it up)

2. Download the attached script and copy to
/var/lib/asterisk/bin/callback and then do a

chmod +x
/var/lib/asterisk/bin/callback

3. Add these options to the end of your configuration file at /etc/amportal.conf:

CALLBACK_PREFIX=91
CALLBACK_CLI=Callback
CALLBACK_RETRY=1
CALLBACK_INTERVAL=10
CALLBACK_WAIT=30