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Zoltes T.38 Fax Call Generator originates/ terminates SIP calls with T.38 fax traffic against either T.38 gateways or IAF devices across the IP telephony networks.


  • SIP-based call generator
  • Send/ Receive/ Polling/ Turnaround Polling
  • ITU-T T.38 version 0 and 3 support
  • ITU-T V.34 hdx, V.17, V.29, and V.27ter modulations
  • A4, B4, A3 page formats
  • MH, MR, MMR, JPEG image compression
  • Resolution up to 1200x1200 dpi
  • Error Correction Mode
  • Test Commands
    • Originate Call
    • Answer Call
    • End Call
    • Fax Session
  • Provide configurable BCD signals, TCF, and
    Message delays in order to sustain transmission impairments
  • Playback T.38 fax sessions generated by Zoltes V.34/ T.38 Fax Analyzer
  • Provide detailed analysis results of  T.38 fax sessions using Zoltes  V.34/ T.38 Fax Analyzer
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Zoltes video single end testing


  • Cost effective solution
  • All-in-one call control and fax traffic generation
  • Flawless integration with Zoltes T.38/ V.34 Fax Analyzer for in-depth fax analysis



3300 N. Main Street, Suite D
Anderson, SC 29621-4128
Phone: +1 (864) 642-1571

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