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An optical time-domain reflectometer (OTDR) can detect bends, breaks, or distortions in fiber cables by measuring the cable's length and forming a picture or trace of the cable's condition. These traces are created from the OTDR sending pulses of high-powered laser light down the fiber and analyzing the backscatter (amplitude value of returned signal) of light that returns to the source location. The location of the event is measured by calculating the round-trip time of the light pulse sent down the fiber. Besides providing a picture of the fiber optic cable route, an OTDR can also show the integrity of fibers and passive optical components (connectors, splitters, splices, and multiplexers) along the cable path. All of the analyzed information is stored on the OTDR allowing a technician to look back to see cable degradation over time. These features make the OTDR an optimal tool for troubleshooting fiber optic cables. Most issues that end up gradually damaging the fiber are able to be detected and fixed before an outage occurs. This is essential to keeping customers happy and makes the OTDR a great choice for fiber optic testing.

Avalon carries a wide variety of OTDR test equipment for rent or purchase from top manufacturers (VIAVIAnritsuEXFO, and more) so you can Test With Confidence®.

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Anritsu MT9083A2 OTDR ACCESS Master

Delivers full featured OTDR performance plus loss test set and quality of service measurement in a surprisingly small and lightweight package. At only 28.4cm wide x 20cm tall x 7.7cm deep and 2.6kg (5.7lbs.), it is field portable, yet rugged enough to withstand the outside plant environment. When equipped with power meter and visual light source options, it replaces several, larger pieces of test equipment.

Anritsu MT9085A OTDR ACCESS Master

An all-in-one tester for optical pulse tests, optical loss/power measurements, and optical fiber end-face inspections.

EXFO FTB-720 Single/Multimode, LAN/WAN Access OTDR

EXFO FTB-720: the ideal construction OTDR for everyday field testing in any access network. With an iOLM application for both singlemode and multimode testing, it's the most automated and intelligent troubleshooting tool for FTTA, LAN and data centers.

Anritsu MT1000A OTDR Module

OTDR Module for the Anritsu MT1000A Network Master Pro

VIAVI Solutions T-BERD 5800 Handheld Network Tester- QUADC

The configurable T-BERD 5800 is the industry's smallest dual 10 G handheld instrument for Ethernet, SONET, SDH, OTN, Fiber Channel, and CPRI/OBSAI testing. BBU Emulation.

VIAVI Solutions T-BERD/MTS-2000 Handheld Modular Test Set

A hands-free test set for the installation, turn-up, and maintenance of fiber optic networks. Rent from Avalon Test Equipment!


Optical Time Domain Reflectometer with Bluetooth®


The ODM OTR 700 tests optical reflection and loss in fiber networks. Rent or purchase this unit from Avalon Test Equipment.

VIAVI Solutions T-BERD/MTS-8000 Scalable Multitest Platform

The T-BERD/MTS-8000 is the world’s most scalable test platform for next generation high speed network deployment (40G and 100G). It’s a multi-application platform with physical, optical and Transport / Ethernet testing capabilities.

VIAVI Solutions/JDSU CellAdvisor Base Station Analyzer JD745B

The JD745B is a comprehensive solution providing all the functions to effectively test any cell site. The combined functionality includes spectrum analysis, cable and antenna analysis, power meter, interference analysis, channel scanner, RFoCPRI™, signal analysis, and PIM detection.

VIAVI Solutions/JDSU CellAdvisor Base Station Analyzer JD785B

The JD785B is a comprehensive solution providing all the functions to effectively test any cell site. The combined functionality includes spectrum analysis, cable and antenna analysis, power meter, interference analysis, channel scanner, RFoCPRI™, signal analysis, PIM detection.

EXFO MaxTester 720C Access OTDR

The MaxTester 720C provides first-time-right fiber characterization with its short dead zones and effective dynamic range.

EXFO FTB-1v2/FTB-1 Pro Platform

The FTB-1 allows field technicians to carry out dedicated optical, Ethernet and multiservice test applications simply and efficiently.

EXFO MaxTester 715B Last-Mile OTDR

EXFO MaxTester 715B is the entry-level, fully featured, dedicated OTDR with tablet-inspired design perfect for frontline single mode fiber installers.

Fluke Networks OFP-100-S OptiFiber Pro Single-Mode OTDR Kit

Fluke Networks OFP-100-S OptiFiber Pro Single-Mode OTDR Kit; identify fiber-related problems in campus, data center, and storage fiber networks, including those with higher-bandwidth, multi-Gigabit architectures.

VIAVI Solutions OneAdvisor-800

The Viavi OneAdvisor-800 was designed with 5G in mind, allowing cell site technicians to test fiber, RF, and CPRI/Ethernet from a single instrument.

EXFO SPSB-B-500-9191 Soft Pulse Suppressor

Used in conjunction with an OTDR, the SPSB covers the OTDR's dead zone, enabling loss measurement on the first and last connections of a fiber under test.

VIAVI Solutions E4146QUAD Multimode/Single-Mode 850/1300/1310/1550 nm OTDR Module

Quad Dual Port Multimode 850/1300, Single-mode 1310/1550 nm OTDR Module for T-BERD/MTS-2000/4000.

VIAVI Solutions T-BERD/MTS-6000A Compact Network Test Platform

Modular multifunction fiber and network interface test platform performs the widest-ranging fiber and network tests

EXFO FTB-2/Pro Platform

The FTB-2, available in a standard or Pro model, is the most compact solution on the market for multi-rate, multi-technology, multi-service testing, delivering all the power of a high-end platform in a conveniently sized, go-anywhere field-testing tool.

FiberPlus D357-S150 Series 3 DZE OTDR Launch Cable

150 Meter Singlemode, SC/APC-LC/UPC.