The Triplett 3330 TeleTalker 330 Telephone Test Set is a rugged and durable professional telephone test set providing all of the basic features necessary to test and maintain analog telephone installations. Housed in a sealed, high impact polycarbonate case, the TeleTalker 330 is usable outdoors in all kinds of weather. A DSL Safe Monitor mode allows high impedance connection to telephone lines without interrupting DSL services or causing DC loading of the line. Clear communications are provided by a dynamic earpiece and an electret microphone. A long life elastomeric keypad provides both Tone and Pulse dialing. Advanced electronic circuitry provides line-powered 3 level voice amplification without the need for a battery. An LED polarity indicator gives visual indication of the line polarity. Convenience is enhanced by Last Number Redial and 10 user memories. An electronic ringer annunciates incoming calls, while a field replaceable metal beltclip provides attachment to a toolbelt or hangup on a cable or peg. Both modular and alligator clip connections are provided. The high quality lead set is field replaceable, and terminated with professional grade 5-way test clips (ABN).