If you're really interested in doing upgrades for codes...
Join LinkedIn and get Mark Sy's full profile..

http://www.linkedin.com/pub/mark-sy/22/a07/210

Degreed EE, 40 some odd years and the elevator business, and has his own company and has been doing fire service, Emergency power, Baby Monitors, etc...For Years...

It Don't mean a thing if it aint got that swing.

Cool, Free, Johnny Smith courtesy of NPR..HERE
http://www.npr.org/ramfiles/asc/asc25.smith.asx