The TS44 PRO buttset from Fluke (formerly Harris) has DSL-Safe technology -- that allows you to butt-in on a live DSL line to test the quality of the voice service without interrupting the data service.
 
	
DataSafe PRO protection - 2x the standard High Impedance Monitor, Data Lockout, Lockout Override, DSL/POTS Filtering Technologies.
	
With a new weatherproof case, legendary DropSafe™ ruggedness and a unique belt clip on top that allows using the buttset while hanging, the TS44 Test Set was designed to be used and to be useful in a wide range of conditions.
	
Standardized by each of the Regional Bell Operating Companies (RBOCs) nationwide.
	
ADSL Safe Technology - won’t harm data service while testing phone service.
	
Data Lockout protects data services and emits warning tone.
	
Enhanced overcurrent protection assures product survival in high current, high voltage environments
	
Weatherproof case design
	
Low/high voltage and low (mA) current detection are displayed with easy-to-read LEDs
	
DropSafe ruggedness -- meets Bellcore drop test, 20’ onto concrete
	
Patented power sharing circuit for longer battery life
	
Side-mounted rocker style talk monitor switch
	
Unique top-mounted belt clip positions keypad upright while hanging
	
Low battery warning
	
Amplified speaker for monitoring calls while on hold and for testing line condition
	
Speed dialing for ten 23-digit numbers
	
Last number redial
	
Flash with user programmable durations
	
PBX pause button
	
Hearing aid compatible receiver
	
Receiver volume control
	
Continuous polarity indication in talk mode
	
Field replaceable line cord and belt clip
	
Color may vary from illustration.
	
FREE shipping in the USA