The 935AT Communications Test Set combines the functions of a voice band transmission measurement set (TMS) and wideband TMS, signaling emulator and analyzer, T-1 test set, and voice quality analyzer in a portable package.
This test set, while general purpose in nature, is particularly useful for DEMARC and Central Office testing, as well as PBX and Circuit Switch and Packet Switch installation testing. It is capable of performing all in-band transmission and signaling tests required at these locations, including those for Feature Groups A - D (Equal Access). The 935AT can simulate or monitor both ends of a typical North American circuit.
Transmission Features:
• Level and Frequency (20Hz - 5000Hz)
• Noise (C-Message and 3 Khz Flat Weighted)
• Noise-to-Ground
• Signal-to-Noise Ratio
• Return Loss (2- and 4-wire)
• Frequency Sweep
• Dual Tone Generator (level, frequency, cadence)
• Programmable Echo Canceller Disable Tone
• 100/102 Test Line
Digital Features:
• 1.544 Mbit/s T1 (D4/SF, ESF and SLC-96 framing)
• Internal High Stability Clock or Loop Timed
• Terminate dual direction drop and insert or monitor modes
• Real time display and control of A, B, C, D bits.
• uLaw or aLaw encoding
• Voltage measurement at Protected Monitor Point
• Full rate and 64kbit BERT measurements (G.821 and M.2100)
• Generate and detect Alarm and Error conditions
• DS0 Loop back with gain control
Signaling Capabilities:
• Loop Start (2/4-wire, contact, normal and reverse battery)
• Ground Start (2/4-wire, contact, normal and reverse battery)
• E&M Types I-V (Send-M, Send-E)
• PCM (Normal, FXO/FXS and CCIS supervision)
• Dry (for direct connect with no supervision)
• Wink Detection and Timing
• Delay and Immediate Dial
• DP, MF, and DTMF addressing
