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LAN/WAN Access OTDR — FTB-720


The ideal construction OTDR for everyday field testing in any access network as well as in 
LAN/WAN networks.

Technical Information

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iOLM Ready logo

EF Compliant


Key Features

  • Dynamic range of up to 36 dB
  • Event dead zone as low as 0.8 meter
  • Combined singlemode/multimode wavelengths (12CD-23B model)
  • Integrated tool: combines a visual fault locator, inspection probe, broadband power meter and a CW source mode
  • Controlled launch conditions for more accurate loss measurements
  • Live fiber testing at 1625 nm
  • EXFO Connect-compatible: automated asset management; data goes through the cloud and into a dynamic database
  • iOLM-ready: one-touch multiple acquisitions, with clear go/no-go results presented in a straightforward visual format


  • Access network testing
  • LAN/WAN characterization
  • Private networks
  • Data centers

Short Dead Zones

EXFO’s FTB-720 OTDR helps you boost test productivity for inside-plant applications. Its exceptional 0.8 m event dead zone enables you to easily locate and characterize all events between the transmitter and the central office’s fiber distribution panel. This feature also comes in handy in access and LAN/WAN network applications, where events are usually closely spaced.

Multimode and Singlemode Flexibility

The FTB-720 model combines singlemode and multimode functionalities, ideal for private/premises/enterprise network testing. It offers the industry’s shortest dead zones, as well as lightning-fast acquisitions. Test multimode fiber within premises or singlemode fiber between premises—all with a single OTDR unit—and maximize your return on investment.

Filtered Port for Live Fiber Testing (Singlemode only)

The singlemode model now features a filtered 1625 nm port for in-service troubleshooting of live networks, such as P2P, FTTx and PON. The singlemode model is a versatile day-to-day tester for any access networks.

EXFO’s OTDR Software: Boosting Productivity in the Field

Auto and Advanced Modes: Choose Your Testing Approach

Streamline data acquisition in the field and report generation back at the office with EXFO’s powerful OTDR software. Choose from two testing approaches: Auto mode or Advanced mode.

Related Resources

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Pulse Selection vs. Dead Zone

Application Notes

Generally speaking, the rationale behind selecting the shortest pulse on an OTDR is to obtain the best spatial resolution, and the best event and attenuation dead zones needed to detect and measure very closely spaced events.

Last updated: 2014-05-02

OTDRs are often used with a launch fiber/cable, and may also use a receive fiber/cable. The launch cable, aka “pulse suppressor” or “dummy fiber,” allows the OTDR to recover after the test pulse is sent into the fiber. This cable provides an invaluable reference on the first connector of the cable under test for determining its loss and reflectance.

Last updated: 2014-02-03

Everyone agrees that fiber inspection is critical, though it is still considered a complex and time consuming test process. See how EXFO is changing the game with the FIP-430B, its fully automated fiber inspection probe turning fiber inspection into a quick and simple one-step process.

Last updated: 2014-01-22

The intent of this application note is to promote a better understanding of video inspection probe specifications and features. Properly understanding the key specifications and features will greatly facilitate the decision process involved in acquiring such devices. Understanding the key aspects of fiber inspection probes will also help users understand how fiber inspection probes operate, thus enabling them to maximize the full potential of these devices.

Last updated: 2014-01-21


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v2.5 SP3 - Mini ToolBox 1 See all versions
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EXFO’s OTDR software: Boosting productivity in the field.
Auto and Advanced Modes to streamline data acquisition in the field and report generation back at the office.

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