In order to enhance the functionality of weatherproof telephone in high ambient noisy areas, an External Flasher with Ringer is used along with the Phone.
It acts as additional / secondary call indicator to signal the incoming telephone call to the user.
As soon as the user lifts the handset off the telephone, the Flasher stops.
It gets connected to the weatherproof telephone through Telephone Relay Box.
Through Weatherproof Telephone Relay Box