The T-BERD 950 Communications Analyzer features a modular and field-upgradeable architecture that supports analysis for ISDN PRI/BRI, frame relay, analog, DDS, T1, FT1, PBX trunks, data communications, DID circuits, among others. The battery-powered T-BERD 950 enables field technicians to test analog and digital voice and data circuits at the customer premises with one easy-to-use instrument weighing less than 13 pounds. The instrument's functionality and graphical LCD display make it ideally suited to regional Bell operating companies, competitive access providers and local exchange carriers whose technicians are tasked with complex installation and maintenance responsibilities.