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Understanding Fiber Connectivity With Belden

by Nate Johnson on May 13, 2014

Datacom and telecom industries have been undergoing huge transitions across the past few decades thanks to ballooning data usage and the introduction of higher speed fiber connectivities. With solutions and common connector types carrying across the world (and even with close geographical areas) it should come as no surprise that contractors and integrators may have a hard time staying up to date with every connector type available.


Dive into an introductory breakdown and learn about the common connector types that surround us today, courtesy of Belden, a leader in telecommunications and datacom connectivity solutions.


This short list is only the tip of the fiber connectivity iceberg, too. Different countries will often have an expanded list of connectors, as do specialty and professional connectors for niche applications. How many of the connectivity types and technologies do you recognize?



E2000 Connector


The E-2000 connector series is a type of fiber optic connector featuring a spring-loaded shutter and dust-cap. Application use includes WANs, LANs, CATV and general telecom systems. Compliant with International IEC 61754-12 standards.


ESCON Connector 

Enterprise System Connection, or ESCON, is a data connectivity connection created by IBM mainly for use in main-frames and storage devices. ESCON supports dynamic switching, however it has been replaced by IBM's FICON fibre channel.c


F3000 Connector 




Similar to the E-2000 connector series, the F-3000 connector family boasts cpring-loaded shutter caps. This connector is geared towards fiber to the home deployments and has been rated as compliant with International IEC 61754-20 standards.


FC Connector

Standing for either 'ferrule connector' or 'fiber channel', fc connectors are becoming an outdated connector technology by LC and SC options. Typical in datacom, telecom and fiber optic deployments, FC connectors have been standardized in the EIA/TIA-604-4 and IEC 61754-13 standards.


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The LC connector is a small form factor ceramic based connector that was developed by Lucent. It is highly favored for single-mode applications. In comparison to the ST and SC connectors, LC connectors are only half the size - 1.25mm ferrule vs 2.5mm ferrule diameter.


MIC Connector

MIC style connectors are a type of fiber distributed data interface (FDDI). These types of connectors are often ceramic ferrule based duplex connectors. 


MPO MTP Connector

MPO, or 'multi-fiber push on', refers to an NTT developed optical connector built around the MT ferrule. It is generally used for indoor applications and is easily connectable. Standards for MPO connectors can be found in IEC-61754-7 and EIA/TIA-604-5 - for international and US standards respectively.


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Evolving beyond MPO is the MTP connector technology developed by US Conec. Essentially an enhanced MPO connector that is inter-matable with established MPO connectivity, MTP has superior performance as well as flexibility.


MT Connector




An MT connector is a 'mechanical transfer' multiplex snap-in connector, primarily used in preterminated cable assemblies and outdoor applications. Based on single ferrule connections, MT connectors can support up to 72 fibers in one connection point.


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Mu connectors are a standard connectivity option created by NNT and used heavily in Japan. It is a small form factor SC connector with the same push/pull style, but capable of fitting in half the footprint of traditional SC connectors. This connection type utilizes a 1.25mm ferrule diameter and is compliant with international standard IEC-61754-6.


ST Connector

The ST style connector was developed by AT&T and is a contractor favorite due to its simple and efficient termination - 'set and twist' or 'stab and twist' being popular mnemonics. It is usually used in multi-mode fiber connectors, utilizes a 2.5mm ferrule connector. Due to their straight tips, angled connection is not possible. ST connectors are compliant with international standard IEC-61754-2.


SC Connector



SC connectors go by many names, including square connectors, subscriber connectors, and standard connectors. This connector has a 2.5mm ferrule diameter and is extremely common in telecom and datacom applications. Originally developed by NTT and compliant with International standard IEC-61754-4.


How Belden Can Help

Brilliant in design and universal in implementation, Belden's new FX Brilliance Universal no-epoxy, no-polish, no-crimp field-installable connectors make fiber field termination faster, easier and better with our industry-leading design. Universal tools simplify field fiber optic terminations across an array of connector types, too.


  • Faster fiber termination in as few as 5 seconds
  • Faster installation proficiency through simple termination technique


  • Easier with no epoxy or polishing
  • Easier no-crimp design
  • Easier with universal tools and installation for LC, SC and ST


  • Better termination yield with integrated VFL feedback
  • Better universal cable support for 250 um, 900 um, 2 mm Jacketed, 3 mm Jacketed
  • Better universal fiber support for OM1, OM2, OM3, OM4 as well as OS2


To learn more about Belden's mechanical fiber splice connectors, then check out the features, benefits, and resources that are available, below:

Learn More About Fiber Mechanical Splice Connectors


For more information on Belden products, their new FX Brilliance Universal Connectors or other telecommunications questions, please contact your local Accu-Tech representative today!



Images courtesy of wikipedia commons image library. Authors of the respective works can be found at the following locations:

Topics: fiber Belden connector

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