The A770 eyebrow expansion panel from Technisonic provides for four supplementary input switches to interface with the A710, A711, A720 or A721 which can expand the total number of inputs from 10 to 14. This panel (when installed) also provides for control of ICS loop and ICS call functions. Eyebrow expansion panels are normally shipped with two default overlay legends which are easily changed in the field. A custom template allows for customers to configure the overlay to comply with their specific installation requirement.

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