Call progress, modem handshake & protocol analyser for V.22bis dial-up systems


Obtain unique insight into physical layer issues, with tone event logging,
spectrogram & constellation displays, and effortlessly decode
POS SDLC and ISO-8583 financial message data.

  • ls-f-hookup

    Audio in - data out

    • Easy and non-intrusive telephone line monitoring using your notebook's soundcard.
    • Responsive online support by our technical specialists.
  • ls-f-iso8583

    ISO-8583 trace

    • View annotated contents of financial messages.
    • Create different configurations from starter templates.
  • ls-f-spectrum

    Check tones

    • Get accurate dB/Hz estimates for call progress and handshake tones.
    • Built-in spectrum analyzer with peak finder.
  • ls-f-datalink

    Async/SDLC/HDLC trace

    • Obtain hex dumps of link layer exchanges.
    • Detect retrain & break patterns.
    • View bitstream.
  • ls-f-constellation

    View constellations

    • Visually check symbol constellation for impairments such as low SNR, gain compression and phase noise.
    • Channel estimates for modulation error ratio, equalizer stress, and carrier level, frequency and jitter.
  • ls-f-handshake

    Troubleshoot handshakes

    • Automatic detection of FastConnect, async/sync and V.22/V.22bis, with detailed reporting.
    • Inspect tone events such as DTMF, call progress & handshake signals.
    • Use special diagnostic modes to aid troubleshooting.
  • ls-f-spectrogram

    More instrumentation

    • Channel gain, symbol timing error, carrier offset & phase error.
    • Demodulator modulus/eye monitor.
    • Spectrum analyzer, spectrogram & waveform envelope.
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