If you are calling during normal office hours (Monday-Friday 9:00am - 6:00pm EST) and you get the Auto-attendant (that annoying voice that say's 'Welcome to Alcorn McBride. If you know...') it means the Operator is answering other lines or is away from the desk.
It is best to use the directory and try the person's extension (see below) or leave a message in the correct department voice mail.
EXTENSIONS
David Geoghegan 1436
Tom Gottshalk 1468
Thomas Bridges 1275
Mike Polder 1765
Audrey Castaneda 1283
Glen Winter 1946
Grace Warfield 1927
Jim Carstensen 1227
Scott Harkless 1427
Joy Burke 1287
Adam Rosenberg 1767
Martin Chaney 1242
Steve Alcorn 1252