The Intrasonic I2000AP adapter plate is useful when replacing a Nutone NM200 or M&S DMC1 intercom with an Intrasonic I2000 system. The I2000AP fastens to the existing rough-in ring. The I2000 room or patio station is fastened to this adapter plate. This plate covers the larger cut-out so the drywall does not have to be patched.