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They will usually open automaticaly (from the inside); from the
outside, you need to use an identicard. If you ask to enter, the
person inside has to give the verbal cue.

jms

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You can program in a variety of commands, from OPEN to COME or
YES, though the vaguer the statement, the more probability of a
mistake.

jms

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Yes, there's a sensor device, just as in your local drug
store's automatic doors when you approach.

jms