Cookies Use on AFL Website We use cookies to give you the best online experience. By using our website you agree to our use of cookies in accordance with our privacy policy. Agree
Home / AFL Blog / March 2017 / 5 Best Practices for Certifying Next Generation Networks: A Suitable Test Reference Method
Blog posts

5 Best Practices for Certifying Next Generation Networks: A Suitable Test Reference Method

This blog is part of a series. See links to all posts below.

Type and quality of test reference cords

Before we dive into test reference methods, we need to discuss the type and quality of test reference cords. To assure the most accurate loss measurements when testing a link, the use of Reference Grade cables during the referencing process is critical to ensure accuracy, repeatability and reproducibility.

Using average or even poor quality reference cables will lead to understated loss values and in some cases, even negative values (i.e. “gainers”). While negative test values don’t indicate a failure, they can be an indication of an invalid reference so any measurements may become suspect.

High quality Fiber Certification Test Kits will include Reference Grade test jumpers which have been produced with tighter tolerances and improved durability. However, even Reference Grade cables need to be cleaned and inspected prior to referencing every time.

Test reference method: which should I choose?

TIA-526, referred to in TIA-568, specifies three different referencing procedures: 1-jumper reference, 2-jumper reference and 3-jumper reference. These were formerly known as Method B, Method A and Method C, respectively. The naming convention was altered in an attempt to make it easier for users to recognize how many jumpers should be used in the referencing process when testing. The 1-jumper method is the preferred method in the TIA-568 standard, while the ISO-14763-3 standard does not state a preference.

Depending on the application and network being tested, each jumper method has pros and cons and a quality Fiber Certification Kit will allow the user to perform accurate measurements regardless of which method is specified.                                                                                       

1-jumper reference


For shorter distance applications such as those found within Enterprise networks and Data Centers, the 1-jumper reference procedure is the most commonly used method in the industry today. The 1-jumper method includes the loss of the connections at both ends of the fiber link under test. Because much of the loss on a short fiber link is the result of those connections, this is considered the preferred measurement technique.


2-jumper reference


For Telco or long distance applications where fiber loss dominates the overall loss of the link under test, the simpler 2-jumper method is generally preferred and commonly used. This method is also used when the link under test has connectors that are not compatible with the test equipment.


3-jumper reference


The 3-jumper method is used when the fiber type of the test cords do not match the fiber type in the link. This situation could occur when testing multimode networks where various types of cable are used.


With the increased deployment of MPO-style connectors, a 3-jumper reference procedure is often used to test MPO-to-MPO trunks to account for changes in gender/pinning as well as polarity type (A, B, C).


Conclusion: Employ a suitable test reference method for the application and use reference grade (i.e. high quality) test reference cords. Measurements are only as good as the weakest link.

Have any questions? Feel free to contact us or leave comments below.


Posted: 3/10/2017 by | with 0 comment(s)
Filed under: AFL, Best Practices, Certification, Networks, Test and Inspection
Blog post currently doesn't have any comments.
Leave comment

 Security code

Recent Posts

Optical Fiber is the Key to Future-Proof Networks

10/26/2021 4:06:15 PM | with 0 comments
AFL's Seán Adam explains how optical fiber is key to ensuring "future-proof networks," a crucial element in maintaining this growing rate of connectivity.

Product Spotlight: NodeFLEX® Bendable Cable Assembly

10/26/2021 11:45:52 AM | with 0 comments
AFL designed the NodeFLEX® Bendable Cable Assembly to help multi-system operators (MSOs) simplify the installation of aerial, underground and pedestal mount applications.

AFL FTTx/PON Products Receive Awards from BTR’s Diamond Technology Reviews

10/25/2021 10:18:29 AM | with 0 comments
Four AFL products were recognized by the 2021 Broadband Technology Report's (BTR) Diamond Technology Reviews.

Achieving a Connected World

10/13/2021 4:06:02 PM | with 0 comments
In this blog Seán Adam, Vice President, Market Strategy and Innovation at AFL, discusses what it will take to Achieve a Connected World, including a skilled workforce and a network that has flexibility, accessibility and expandability. 

Single-mode vs. Multimode

10/11/2021 3:05:33 PM | with 0 comments
This blog will explore the differences between single-mode and multimode fiber. 

Blog Tags

& 100G 12R 12S 2014 2015 2016 21s 22S 31S 41S 5G 62S 70R 70S 802.11ax 90R Access Networks accessibility accessories AccessWrap ADSS Aerial Aeros AFL AFL. Air Blown Fiber AlumaCore Aluminum and APEX APM-101 APM-102 APTA ASCEND ASIS Associates attenuation awards bandwidth Best Practices BICSI Bishop black Blog bluetooth Broadband BTR bus Cable cable deployment Cables Cable-Tec Cabling Careers Case Case Studies Catalogs Cell Tower Demarcation center Certification CGM Plus Rack Panel CI&M Innovators Award Cladding clean cleaner Cleaning Cleaning Supplies Cleaver cloud CO2 Lasers Coating collaboration collapsible Community Community Outreach compression Compression Accessories Computing Conductor Connect Connections Connectivity connector Connectors Co-ops copper Core Core-alignment Coronavirus Corporate Covid-19 C-RAN CT-30 CT50 CTIA customer experience CWDM dampers DAS data Data Center Data Centers Dead Ends demarcation Demonstration density Diamond Distribution Enclosure Donda DT Duel Dura-Line DWDM eABF Edge electric Enclosure end-to-end solutions Energy Engineer Enterprise Equipment ESB estimation expandability Expo Exterior Distribution Cabinet Facebook Fall Fall 2013 FAST SC FASTConnect FC Features Fiber Fiber Cleaver Fiber Connector Inspection Fiber Distribution fiber inspection Fiber Laser fiber management Fiber Optic Fiber Optic Cable Fiber Optic Intrusion Detection System Fiber Optic Training Fiber OpticTraining Fiber Prep Fiber Security Fiber Shaping Fiber Splicing fibre fibre optic cable field installable Field Splicer flexibility flexscan Flex-Span Flickr FlowScout FOCIS FOCIS Duel FOCIS Flex FOCIS Lightning FOCIS WiFi2 French FSM-100 FTTh FTTx Fujikura FuseConnect Fusion Fusion Splicer Fusion Splicers Fusion Splicing Gas generations Glass Processing global Google Governor Nikki Haley Grand Canyon Greenville Grounding Hardware high high-density High-Wire Walk HiTemp Hyperscale IDEAA IEEE infrastructure innovation inspect Inspection Instagram Install Installation Installing Instructions Integrated Solution International Sales Meeting Internet Interns IoT JMA Kit Laser Last Mile LAZERMaster LC Light Brigade LightLink LightWave LinkedIn live line LL-550 LL-550 & LL-580 enclosures LL580 LL-580 LMHD Loss LZM-100 M210 M310 Maintenance mechanical Metro Ethernet Metro-E MFIS MicroCore Mining mode Month of Service mount MPO MSOs Multi-Fiber Identification System multimode Network Networks new New Year NFPA Nik Wallenda Noyes NY OCS OEM of Oil One-Click OPGW Optic Optical Optical Connectivity Optical Sensing Optical Splicing optics OSP OSP MicroCore: LM200 & LMHD Series OTDR Outside Plant panel panels Paper PCS-100 Stripper Perimeter Security System PES Photonics Photonics West PhotonicsWest platform PM Splicing polarity Poli-Mod power Power Systems PREVAIL Procedures product Product Registration Products Provider providers rack Rail Railway Recoater Recruiting resource center Resources Reviews ribbon Rogue Rural Utilities Rusty Williams SB01 SC SCADA SCTE SCTE Cable-Tec SDN Selection Sensing service Services Sidewinder Rapid Cable Deployment System Silver Level Award single single circuit outage Single Lambda Single-mode SkyWrap Small-Cell Smart City Smart-Grid Smartphone Snapshot Social Software Defined Networking Solutions Spanish Specialty Specialty Splicer Spider Web Ribbon SpiderWeb SPIE Splice Enclosure Splicer Splicers Splicing ST Stockbridge Dampers Stranded Stainless Steel Cable Stream Streetcar Structured Cabling Study substation SuperMobility Support SWAGE Swaging swan SWAT SWFT System systems T&D T&I: technology Terminal termination Termination Instructions Test Test &Inspection Test and Inspection Testing Things Titan Tools trade show Trade Shows traffic Training Transit transition transmission Transportation trends TS100 Tube Tutorials Twitter Ultra HD Upstate Alliance utilities Utility ventilator VFI V-Groove vibration Video Videos Vodafone WDM WDM900 We Connect Webinar Website White White Paper White Papers White-Paper Wi-Fi Winter Wireless Women workflow Wrapping Wrapping Tube Cable WTC/SWR