MaxTester 635G

Handheld solution for ultra-broadband installation and maintenance


Efficient copper characterization and DSL/ analysis for the installation and maintenance of ultra-broadband deployments.

Technical Information

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Key Features

  • with backwards compatibility to VDSL2 and ADSL2+ with one test tool
  • Compatible with EXFO Connect for cloud-based test asset management
  • Spectrally compatible VDSL2 35b support and, VDSL2 and ADSL2+ bonding
  • Adherence to existing methods and procedures is easy with single-ended testing or via testing to a far-end device (FED), including high-voltage stressed balance testing
  • High resolution 6-inch touchscreen with dual 1 GigE ports and single test lead connection supporting both and copper testing
  • Designed to face the challenges of the outside plant environment, with an IEC IP54 rating


  • FTTx/MDU,, VDSL2 35b and VDSL2 vectored installations
  • Bonded-VDSL2 and ADSL2+ deployments
  • Multiplay service assurance (Internet, IPTV, and VoIP)
  • FTTdp deployments
  • mobile backhaul, DAS or small cell deployments

Installation and Repair of Voice, Broadband and Ultra-Broadband Deployments

EXFO’s MaxTester 635G (MAX-635G) is a complete DSL and copper test set featuring the latest in ADSL2+, VDSL2, and (ITU-T G Series 9700 and 9701 recommendations for fast access to subscriber terminals) chipset based connectivity technologies. Featuring traditional copper measurements (voltage, resistance, capacitance and time domain reflectometry) and highly automated scripted tests, the MAX-635G offers everything a technician needs to complete jobs efficiently.

For service providers considering as a possible future offering, the MAX-635G provides operators today with support for enhanced VDSL2 35b, VDSL2 and ADSL2+ single pair and bonding, in addition to copper testing capabilities. Coupled with the MAX-635G’s small form factor, rugged design, easy-to-use menus and clear pass/fail test result conclusions technicians can close their jobs quickly and efficiently. The large touchscreen display makes it intuitive and user friendly. When it comes to saving results, it provides technicians with many connectivity options for uploading tests and compiling reports.

Work Smarter with the MAX-635G

Equipped with SmartR™, the MAX-635G allows technicians to work smarter, not harder. SmartR is a suite of intelligent and automated tests that enable any technician to quickly and easily get an understanding of the condition of the line under test, as well as to identify and locate a variety of common circuit faults. The Pair Detective feature automatically runs the most common line tests and provides graphical, color-coded results and pass/fail indications to detect conditions including shorts, grounds, opens, battery, splits and imbalances. FaultMapper utilizes time-domain reflectometry (TDR) and resistive-fault location (RFL) technology to provide the additional capability of locating service-affecting line faults including bridged taps, shorts, grounds and opens. EXFO’s unique SmartR presents results in an easy-to-understand, graphical format with plain language feedback, making copper troubleshooting easier than ever before.

Comprehensive Metallic Testing

Verification of copper quality is a snap with the copper measurement capabilities of the MAX-635G. Thanks to its industry standard AC and DC voltage, resistance (shorts), capacitance (opens), power influence, balance and impulse noise measurements, technicians obtain clear graphical results with simple pass/fail indications. The MAX-635G also features a POTS dialer, an optional TDR with dual-trace comparison capability and optional 2/4 wire RFL and K-test measurements for pinpointing loop faults. Technicians have the choice of running single-ended tests, or running tests against an optional far-end device (FED).

Multiplay Performance Mandate

Ultra-broadband and enhanced VDSL2 deployments such as VDSL2 35b are driven by subscriber requirements for flawless IPTV and over-the-top (OTT) video, high speed downloads and uploads, social networking push and pulls, and online gaming (e.g., MMORPG), to name a few. The MAX-635G allows technicians to connect subscriber equipment (e.g., PC, STB, gaming console) to its LAN port to transfer data at speeds up to 1000 Mbit/s.

Noise Mitigation Features

Ensuring the highest quality multiplay services to customers is critical for service providers deploying ultra-fast broadband connectivity. With an aging copper plant and the need to maximize the use of all pairs in the cable bundle, it is imperative that the appropriate mechanisms are in place to mitigate the impact of noise. Noise is a significant service-affecting condition than can have a major effect on the multiplay quality of experience. The MAX-635G has a number of measurements to help mitigate noise. Starting with determining the copper’s ability to mitigate noise using stressed balance, longitudinal balance and impulse noise detection, the DSL chipset offers INP (impulse noise protection), G.INP (impulse noise protection and physical-layer retransmission as defined by ITU-T G.998.4) and vectoring (ITU-T G.993.5) plus a complete set of SELT measurements for attenuation, noise and SNR for tone analysis up to 106MHz.

All the Right Features for Installation Technicians

With its small form factor, the MAX-635G can go anywhere the technician needs to go. It is rugged and lightweight, and protected from the rain—just what is needed for the demanding outside plant environment. The user interface of the MAX-635G was designed with simplicity and efficiency in mind. The large touchscreen display features colored icons and graphics for easy configuration and operation, and is simple to use for both experienced and novice users.

Automated Service Testing

Testing ultra-broadband circuits with the MAX-635G is easy with customizable profiling. Setup the unit to do routine jobs or setup custom profiles for special projects. Test profiles can easily be transferred between units using USB or EXFO Connect to ensure that all technicians from the same organization are testing to the same specifications. In addition, the MAX-635G boasts customizable thresholds allowing all technicians to visualize pass or failed conditions so they can quickly move on to the next job or investigate further.

Data-Mining of Results

In today’s highly competitive network service provider environment, quality of service delivered to subscribers is paramount. With a solution such as EXFO Connect and EXFO Sync combined with the MAX-635G, service providers can manage their fleet of MaxTester units and ensure that they have the most up-to-date software installed and properly configured. These solutions on the MAX-635G also make it possible for service providers to have test results in hand for data mining and post-analytics purposes, thereby enabling them to proactively manage loop plants and ensure that they are of the highest quality.

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v3.1 - MAXTESTER 1 See all versions
Oct. 2016

Network testing capabilities expanded to include the following optional features: Web Browser, IPTV analysis, FTP transfer speed and traceroute.

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