You can do this with play_and_get_digits. Just put the correct "pin" value in the regex value of pagd. If they enter the incorrect value then just have the "failure" value be a transfer to a "thank you, goodbye" extension or something like that.

This is your basic pagd syntax:
<action application="play_and_get_digits" data="4 4 3 # /enter_pin.wav /invalid_entry.wav digits 1234 2000 oops "/>

(Note that you need to use real file names - see the play_and_get_digits syntax for all the details.)

Then you need an "oops" extension for when they enter the wrong value"

<extension name="oops, wrong PIN">
<condition field="destination_number" expression="^oops$">
<action application="playback" data="too_many_failed_entries.wav"/>
<action application="hangup"/>
</condition>
</extension>

(Again, you'll need a real sound file with some sort of message telling the caller that he/she entered too many failures. Check our list of sound files in the ivr subdir - there might be one you can use.)

Have fun!

-MC

On Mon, Dec 26, 2011 at 1:06 PM, <georg@riseup.net> wrote:

Hi all,

As the subject states: I'm searching for an application similar to
Asterisks 'Authenticate' [1]. The description writes: "The application
requires a user to enter a password in order to continue execution." I've
found on the wiki the function used for conference rooms, however I need
this for a public reachable phone number, which then leads to a call
redirection system.

Thanks,
Georg

[1] http://www.voip-info.org/wiki/view/Asterisk+cmd+Authenticate