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I've got a Comelit Okay Simplebus2 door entry system which yesterday wasn't able to be used to let someone into the building, however I'm not sure if the buttons next to the phone were being used correctly.

The interface has 2 buttons, 1 with a key and 1 with a lightbulb symbol, and I'm wondering if anyone has seen this style before and knows how it should be used?

enter image description here

I've tried calling the manufacturer but like most places the phone line's closed at weekends

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One of the better ways to answer this sort of question is to check whether the manufacturer's manuals are on line.... – keshlam Aug 9 '15 at 17:00

It can be configured to turn on an external light

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Please improve this answer by explaining how. – Niall C. Oct 19 '13 at 23:36

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