Keysight-Agilent 37722A

The 37722A Telecom Analyzer offers installation and maintenance (in-service and out-of-service), bit error, and signal measurement on CEPT digital circuits in a portable, rugged package
M2100 measurements are standard
Bit rates: 2.048 Mb/s, 64 kb/s;optional 8.448 Mb/s, 704 kb/s, sub-64kb/s
It offers many features to help increase productivity and network uptime: event storage in text and graphic form, n x 64 kb/s testing, timeslot monitor including all signaling bits display, and framing/frame word

Keysight-Agilent 37722A datasheet & specifications