Hi Johannes

I have made a modifikation but only with German Announcment:

http://wiki.innovaphone.com/index.php?title=Howto:Voice_Mail_multiple_announcements_with_and_without_possibility_to_leave_a_message

If you only want to hear the Number you can simply add a:

End of Chapter:

=Prompt Date and Time of File. URL in $message==

add
<if notcond="$dtmf">
<store-get root="" name="en_received_by_number.$coder" out-url="$ctrl" />
<pbx-prompt url="$ctrl" />
</if>
<if notcond="$dtmf">
<assign out="$string" value="$callback"/>
<call name="PromptString"/>
</if>

You have to put a voice promt: en_received_by_number.$coder

If you need more help please tell me.

regards
Olaf