Audio Intercoms  SDL Security Limited  

Audio entry systems are the most cost effective visitor entry system, allowing a visitor to call the resident, have a two way conversation, and if appropriate the resident can allow entry to the visitor.

Most audio systems work in that simple fashion therefore besides operational reliability and a reliable company to install it, the only other consideration is often a cosmetic one.  The entry panel to the left it a smart low cost BPT solution, the audio receiver shown to the right can replace a standard handset.

There are only two differences with multiple occupant buildings systems, that of the number of calling buttons, and the associated extra control equipment. The equipment to the left is an expansion entry panel with 6 extra calling buttons.

The entry panel to the left has been designed to be compliant with the Disability Discrimination Act 1995 (DDA), with tactile illuminated buttons, Braille characters and LED indicators.