Asterisk. Callback from the site how to implement?

Question

PHP

It is necessary to organize a callback from the site, notifying the manager about the source of the call and the page from which the visitor ordered a callback.
The order is as follows:
1. The client went to the site and sent a form with a phone number
2. The manager received an incoming call.
3. When picking up the handset, the manager hears - "Call from site.com, the page is pink elephants"
4. When the recording is completed, a callback occurs and the manager connects to the client
. The callback itself was implemented using ami and Php libraries using action originate.
But here's how to play a sound file with information about the client before that?

Answer 1

Originate connects the specified channel to the specified extension. Specify the manager as the channel, the extension - the client number in a separate context. On this extension you hang a dialplan of the form

[callback]
exten => _X.,1,Answer()
same => n,Playback(всё, что хотите сказать менеджеру)
same => n,Dial(канал/${EXTEN})

Answer 2

The Dial command has options. Look at option A