Yes, provided that Megaphone is open, Megaphone will wake up the computer and answer the call; the hard drive spins up to allow Megaphone to record the message. Also, for more reliable performance, verify that Megaphone is set to be the front-most application when the telephone rings.
To do this using Megaphone 2.0.3P and 2.0.5P, follow these steps:
Step 1
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Open Megaphone.
Step 2
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Choose Preferences from the File menu
Step 3
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Choose "Incoming Calls" from the Topic: pop-up menu.
Step 4
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Click on the "Come to Front when Ringing" check-box.