The MT100r9 provides two receivers and two transmitters for drop and insert, monitor or terminal functions. Decodes D1D, D2, D3/D4, ESF with standard AMI or B8ZS coding. Status indicators for no PCM, Remote Alarm, Frame Loss, Counts BPVs, CRC/Frame Errors, Errored Seconds, Slips. Select any of the 24 channels for both test and non-test directions with reverse direction toggle. Send and receive A, B, C, D signaling bits. Send digital milliwatt. VF input and output jacks. (310). E & M signaling access (310). Monitor speaker. Bantam jack input. Power is -48 VDC with 115 VAC and -24 VDC options. Single rack space. 19/23". Weighs 6 lbs.