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Shop > Phone Systems, Intercoms, and Related Products > Krown Products for the Deaf and Hearing Impaired > Krown Signaling Devices > 10015
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DesignTech Telephone In-Use Indicator™
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This product has been discontinued.
Tells you the phone is in use before you pick up.
Features
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- Prevents interruptions during personal calls. Alerts you when a call is finished and the phone is free to be used.
- Help to prevent unwanted and costly disruption of fax and modem calls. Bright red LED confirms the line is in use.
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- The Unit installs easily - just plug in line with the telephone.
- Requires one 9-volt battery.
How it Works
The In-Use Indicator monitors the telephone line use. When an extension has been picked-up - the red LED blinks to signal that the line is being used.
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