Secretaries are hired to screen calls for their bosses mah. You
know most of the calls for bosses are NOT about work? The banks
will call to suggest your boss have more credit cards; insurance
agents will call to push their whatever policies; housing agents
will call to recommend new office premises; vendors, suppliers,
grouchy customers, etc, etc. Bosses will usually tell their
secretaries to put the call through if it's from Headquarters,
immediate family members or people they are expecting a return
call.