[caption id="attachment_42220" align="alignleft" width="150" caption="The CM-3000 is coupled with Conductor, Calypso's software package."]The CM-3000 is coupled with Conductor, Calypso's software package.[/caption]

For most of us who remember classroom announcements in the 1950s, 60s, and 70s, we recall the tinny, muffled "voice of God" summoning an unlucky classmate to the principal's office. Some may remember an old rotary phone on the teacher's desk--similar to the Cold War-era U.S.-Soviet nuclear "hotline"--that frequently interrupted class with a ring loud enough to derail even the most dedicated students' concentration.

With four new elementary school buildings under construction in...

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