Test set with data lockout and lockout override, making you completely safe in talk or monitor mode. DSL/POTS filtering technology allows you to safely draw dial tone without downing DSL. A built-in tone generator simplifies wire identification with a probe. An amplified speaker allows monitoring the line hands-free, so you can keep working. Talk Battery function provides voltage to carry voice conversation on non-powered pairs. All in a compact unit with an oversized robust liquid crystal display (LCD) that makes the intuitive, common-sense menus easy-to-read and use.

Features:

• Continual data detection in monitor mode
• Caller ID and call-waiting caller ID
• 1-way amplified speaker with volume control for hands-free monitoring
• Tone generator - Use your Harris probe to receive tone and trace wires
• Continuity test for detecting shorts
• Phonebook - Easily store and edit numbers in non-volatile memory - you won't loose your phonebook when changing the battery or if the battery dies
• DTMF digit grabbing - test other equipment for proper DTMF generation
• Row/Column tones for single tone dialing
• High and low voltage lockout
• Low/high voltage indication digital read out
• Low current (mA) indication digital read out
• Overvoltage and overcurrent protection
• Selectable flash and pause duration
• Selectable timeouts to save battery
• Speed dial (10 memories, 23 digits each)
• Polarity indication in talk and monitor mode
• Battery level indicator
• Battery included

Also known as a lineman's handset, a test set, or a butt set.