2Mbit/s unframed BER E1 tester 2Mbit/s framed,N*64kbit/s BER testing framed,unframed signal send and receive RY4300 series 2M/Datacom Transmission Analyzer is a multi-functional and full- featured digital transmission system test device, designed for the installation test, engineering check and acceptance, daily maintenance of digital networks, mainly performing channel test, alarm analysis, ...