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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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With iLOOP you can test two fibers at once with a simple loopback jump, and reduce your testing time by 50% in no time.

This feature is very useful in field applications such as DAS/FTTA and where there’s a large number of fibers to test (Data Centers).

Last updated: 2015-03-12


Specification Sheets

The FTB-720 is the ideal construction OTDR for everyday testing in any access network as well as in LAN/WAN networks.

Last updated: 2014-11-26

Three easy steps for a perfect match: choose your network application, choose your form factor and choose your technology. Get specific test solutions for specific contexts.

Order Hard Copy
Last updated: 2014-11-24

OTDR/iOLM Reference Poster

Reference Posters

This reference poster will help you stay on top of OTDR technology.

More specifically, this poster will help you:

  • Refresh OTDR fundamentals
  • Understand the main components of an OTDR trace
  • Demystify key OTDR parameters
  • Benefit from useful tips
  • Discover a revolutionary test method: EXFO’s iOLM
  • Last updated: 2014-10-23


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