Fiber Ring acts as dual‑purpose launch and receive fiber ring to eliminate OTDR dead‑zone, delivering accurate near‑end and far‑end connector loss measurement. Compact coiled design with flexible or armored variant, easy to store inside standard OTDR carry‑case.
• Dual‑Purpose Launch & Receive — eliminate OTDR dead‑zone for full‑link connector‑loss testing • Compact Coiled‑Ring Design — fits easily inside most OTDR instrument carry‑cases • Two Housing Options — standard flexible jacket or stainless‑steel armored anti‑crush version • Broad Compatibility — SM / MM fiber, multiple connector options, custom length available
Field technicians frequently encounter measurement headaches caused by OTDR inherent dead‑zone. Directly connecting OTDR to fiber link cannot capture accurate insertion‑loss and reflectance data for the first near‑end connector, leading to failed project acceptance and hidden joint faults.
FR Fiber‑Ring solves this challenge by providing known reference fiber length. It shifts OTDR dead‑zone onto this launch‑ring, so near‑end connector events become fully measurable. Deploy second unit at far‑end as receive cable to capture final far‑end connector performance, to achieve complete compliant full‑link test results.
Compact coiled‑ring form factor takes minimal space and fits into regular OTDR tool‑kit. Two construction options are available: standard flexible LSZH/PVC jacket for daily indoor and general field deployment; FR‑A armored version with inner stainless‑steel spiral armor for harsh site conditions against crush, pull and rodent damage.
Built‑in adapter storage compartment, equipped with carabiner and dust protection caps. Supports single‑mode G.652.D / G.657.A1 and multimode OM1 / OM2 fiber. Multiple length options from 100m‑2km, custom connector combinations and custom lengths are supported.
It is cost‑effective daily‑work companion for FTTx installation, link acceptance, CATV and data‑center cabling verification.
Need IP67 waterproof rugged box‑style launch cable for heavy‑duty outdoor site? View LFC‑A launch cable box. For Corning‑fiber IP67 waterproof box variant, check LFC‑B launch cable box. For lab‑grade bare‑fiber calibration reel, see BFR bare fiber reel.
Key Features
Fully eliminate OTDR initial dead‑zone for accurate connector insertion‑loss & reflectance measurement
Dual‑use design: works both as launch cable and far‑end receive cable
Length from 100m to 2km, custom length upon request
Built‑in adapter storage compartment; supplied with carabiner and connector dust caps
Applications
OTDR near‑end connector loss & reflectance test
Far‑end connector measurement as receive‑cable
Fiber‑link acceptance & compliance testing
FTTx / CATV network construction verification
Data‑center cabling inspection
General OTDR field calibration work
Ordering Information
Base model FR = standard flexible fiber ring; add suffix ‑A for armored stainless‑steel version.
Select fiber type, connector combination and required length. Custom connectors & lengths are acceptable.
Code Segment
Available Options
Product Code
FR = Standard Fiber‑Ring; FR‑A = Armored Fiber‑Ring
Note: Recommended length:100‑500m for FTTx access network;1km‑2km for long‑haul backbone testing.
Every unit passes insertion‑loss and return‑loss test before shipment. Custom length, connector and private‑label available.
Technical Specifications
Optical Specifications
Parameter
Value
Supported Fiber
SM G.652.D / G.657.A1; MM OM1 / OM2
Standard Length
100m /150m /300m /500m /1km /2km
Insertion Loss
≤0.3dB typical per connector
Return Loss UPC
≥50dB
Return Loss APC
≥65dB
Connector Options
SC / FC / LC UPC / APC, mixed custom
Mechanical & Environmental
Parameter
Value
Standard Jacket
Flexible LSZH / PVC 2.0mm /3.0mm
Armored Variant
Inner stainless‑steel spiral armor + outer LSZH
Armored Crush Resistance
Up to 200N /10cm, anti‑rodent
Operating Temperature
-20°C ~ +70°C
Storage Temperature
-40°C ~ +85°C
Accessories
Ring case, carabiner, dust caps, built‑in adapter storage
Standard Accessories
FAQ
Q1: What is difference between FR Fiber‑Ring, LFC‑A, LFC‑B and BFR bare‑fiber reel? A: FR Fiber‑Ring is compact coiled‑ring launch/receive cable; flexible or armored choice, fits OTDR bag for general field jobs. LFC‑A / LFC‑B are IP67 waterproof hard box‑type launch cable for harsh outdoor environment, LFC‑A uses YOFC fiber, LFC‑B uses Corning fiber. BFR is bare‑fiber reel without protective outer jacket, mainly for laboratory calibration and R&D, NOT for rough field dragging.
Q2: Should I choose standard flexible or armored FR‑A version? A: Standard flexible FR is cost‑optimized for indoor / general field environment. Select FR‑A armored stainless‑steel variant for construction‑site risks of crushing, treading, rodent bite.
Q3: Can FR Fiber‑Ring be used both as launch cable AND receive cable? A: Yes, same physical unit works two‑ways. One unit at OTDR side acts as launch cable, second unit deployed at far‑end link side acts as receive cable for far‑end connector reading.
Q4: What length should I select for my network test? A: 100‑500m is recommended for FTTx access links; select 1‑2km for long‑haul backbone fiber testing. Custom lengths are supported.
Q5: Can I get custom connector combinations and private labeling? A: Yes. Mixed‑type connectors, custom length and OEM private‑label service are available on request.
