GO HERE buzzing my door to open using ny extension

[sittsh]

I currently dial extension 7001 (my door speakers extension) then after it automatically answers i enter 351 to buzz the door.
I would like to automate it so i just enter an extension number and it waits 2 seconds then automatically dials 351

 

[briankelly63]

http://www.asteriskdocs.org/en/3rd_Edition/asterisk-book-html-chunk/asterisk-DP-Basics.html