Description of Tempo Communications Professional Telephone Display
Easy to use, DSL compatible Butt Set designed to help technicians install, service and maintain voice services. Built-in LCD display for easy dialing, programming, caller ID, voltage, current, ringing, and DTMF measurements. Allows alerting and talking over a “dead” pair of wires. Safe over voltage and over current protection. Luminescent (glow-in-the-dark) keypad.