ForumPortal 2 Who is the voiceA.I. active before GLaDOS is reactivated?

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Is there any info/backstory on the male voice present in the labs before GLaDOS's reactivation? I imagine it would be some sort of emergency/backup system, could anyone shine any light on this?


Its just an Announcer, which gives scripted responses to events. Not an A.I. It doesn't have much authority (only Manual Core Replacements, Fire Extinguishing)