I was wondering if anyone was famliar with that function or have actually used it on a DVR, and what type of DVR was it? I know alot of manufacturers offer that function, but how reliable was it? The talkdown feature has proven to be pretty useful in the environments that I've been installing them as of late. I'm currently using some self amplified valcom horns tied into an ADPRO Fastrace unit, and was looking for an alternative for my customers, since they can't all afford the ADPRO Unit.