The Nicollet DigiSmart™ 4000 series of telephony testing products has a reputation for simplicity, versatility, and solid reliability earned by nearly two decades servicing Telcos throughout North America. Awarded U.S. Patents for design uniqueness, the DigiSmart™ 4000 series is ideal for all your testing needs including E-911 installations and troubleshooting.

DigiSmart 4100-RT / 4200-RT
Features 5 signaling modes to meet all your DID, DOD, and local loop line signal testing requirements

DigiSmart 4300-RT
Handheld test set for troubleshooting two-wire E&M, POTS, and DID circuits. It also measures voltage and levels