Technical Articles

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  How a PBX Works: Call Control, Voice Switching and Fiber Extension

  A PBX manages call setup and release and establishes supported voice paths between its interfaces. Verify both parties and resource release across test calls.

  First published 2026-10-16· Fundamentals· ID 14100Views 85 +1
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  Signal Extender Types: Interfaces, Media and Compatibility

  Choose video, USB or Ethernet extenders by signal roles, transmission method and endpoint compatibility instead of cable type or connector appearance.

  First published 2026-10-16· Fundamentals· ID 14054Views 77 +1
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  Signal Extender Faults: VGA Smearing and Digital Black Screens

  Separate analog VGA edge loss and channel skew from digital video lock, EDID and format faults using direct, short-link and installed-line baselines.

  First published 2026-10-16· Troubleshooting· ID 14049Views 93 +2
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  PROFIBUS-DP Fiber Repeaters: Conversion and Commissioning

  Trace PROFIBUS-DP electrical-to-optical conversion, copper termination and timing limits, then commission a matched pair from a short-link baseline.

  First published 2026-10-16· Fundamentals· ID 14037Views 82 +1
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  PROFIBUS-DP Dual Buses vs Dual Optical Ports

  Distinguish two copper segments, independent DP services and dual optical paths, then test the actual faults covered by a supported redundant topology.

  First published 2026-10-16· Fundamentals· ID 14029Views 78 +3
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  CAN Fiber Links for Fire Alarm Panels: Compatibility Checks

  Check fire-panel networking permission, CAN timing and event interpretation before extending a confirmed CAN interface over a matched optical link.

  First published 2026-10-16· Fundamentals· ID 14021Views 88 +1
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  MINI Fiber Media Converters: Space, Heat and Interfaces

  Choose a compact Ethernet fiber converter with room for connectors and cable bends, suitable heat dissipation, matched optics and verified local power.

  First published 2026-10-16· Selection Guide· ID 14013Views 86 +3
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  Optical Attenuator Tests: Reference Planes and Sensitivity

  Set a receiver reference plane, calibrate optical attenuation and distinguish field margin checks from sensitivity testing with defined error criteria.

  First published 2026-10-16· Networking & Configuration· ID 14001Views 85 +2
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  Wireless Router Protocols: Wi-Fi, DHCP, DNS and Routing

  Separate Wi-Fi association, DHCP addressing, IP forwarding and DNS to diagnose wireless connections that work locally but fail at an application.

  First published 2026-10-16· Fundamentals· ID 13993Views 90 +1
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  Roadside Industrial Networks: Fiber Aggregation and Testing

  Design roadside access and fiber aggregation around optical receive limits, concurrent video demand, site power and service-level fault evidence.

  First published 2026-10-16· Networking & Configuration· ID 13977Views 85 +0