roll call

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The reading aloud of a list of names of people, as in a classroom or military post, to determine who is present or absent.
• noun The time fixed for such a reading.

from The Century Dictionary.

• noun The act of calling over a list of names, as of a school or society, or of men who compose a military or legislative body.
• noun The military signal given by the drum, trumpet, or other musical instrument for soldiers to attend the calling of the roll.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun the reading aloud of a list of names, and subsequent responses, in order to determine who is present or absent
• noun the time of day fixed for such an event
• noun such an event in a legislative body in order to determine if a quorum exists

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun calling out an official list of names