Introduction
Optical communication is the backbone of digital infrastructure, and its precision instruments are widely used in installation and maintenance, security surveillance, metropolitan area networks, and national trunk lines. In this field, Nanjing JILONG Optical Fiber Communication Co., Ltd. (JILONG) has been deeply engaged for decades. Positioned as a leading Chinese optical communication manufacturer, JILONG focuses on the R&D, production, and service of fusion splicers, OTDRs (optical time-domain reflectometers), measurement instruments, fiber tools, and RF measurement products. The company is committed to delivering Chinese-made equipment solutions to the global optical communication industry.
I. Company History: From Breaking Monopolies to Driving Domestic Substitution
JILONG’s story began in 1993. At that time, China’s fusion splicer market was dominated by imported brands, and equipment prices were exorbitant. To change this, the company’s predecessor, Kelong Company, was founded and independently developed China’s first-generation fusion splicer, the KL-100, in the same year. Back when the average annual income was only around 150 dollars, imported splicers cost hundreds of thousands of yuan. The KL-100 was priced at roughly half of its imported counterparts, marking the beginning of domestic fusion splicer R&D in China. In 1996, Nanjing JILONG Communication was formally established, ending the country’s long-standing reliance on imported fusion splicers.
Entering the new millennium, JILONG revolutionized splicer design in 2000 by shifting from horizontal to vertical form factors, launching the more compact, fully automatic vertical model KL-200. In 2006, the fourth-generation splicer KL-260 was released and successfully entered European, North American, and other international markets.
A pivotal turning point came in 2008, when JILONG introduced its first handheld OTDR, the KL-6210, filling a gap in the domestic OTDR market. The KL-6210 transformed JILONG from a single-product fusion splicer provider into a comprehensive solution supplier with end-to-end capabilities in optical network construction and diagnostics, significantly broadening the company’s technical depth, product range, and market competitiveness.
In 2011, JILONG won the title of national “high-tech enterprise”. In 2015, it became the first listed company in China’s fusion splicer sector. In 2016, JILONG was recognized as a famous trademark in Jiangsu Province. In 2019, JILONG engineers were invited to participate in drafting the national standard for fusion splicers, GB/T 17570-2019, underscoring the company’s influence and technology leadership in industry standard-setting.
On the product front, JILONG has rolled out successive splicer generations—from horizontal to vertical, from the first to the tenth generation—continuously adapting to network construction needs across different eras, including “fiber replacing copper,” 3G, 5G, and gigabit optical networks. In 2023, the company held new product launch in Shenzhen, unveiling the tenth-generation splicers (260T, 300T, 300X), the fourth-generation FTTx OTDR (KL-6100), and a range of fiber tools.
In 2024, JILONG pushed further into the high-end trunk market with the 280T all-rounder middle trunk line fusion splicer and the OTDR Monster KL-6300, extending its product matrix into more demanding trunk-line engineering. In 2025, marking its 33rd anniversary, JILONG released an anniversary product series including the 260T, KL-6100, and KL-33F, strengthening its technical depth in FTTx splicing and testing.
Riding on 34 years of technical expertise, JILONG took the lead in launching the 300T 6-motor trunk splicer. Employing state-of-the-art 6-motor fiber core alignment technology and intelligent algorithms, the 300T delivers measured splicing loss consistently 0.01dB—demonstrating the new strength of Chinese-made trunk splicing equipment in high-end applications.
II. Four Product Lines: A One-Stop Solution for Optical Construction and Maintenance
JILONG has built four major product systems: fusion splicers, OTDRs, optical measurement instruments, and fiber optic hand tools. Going forward, the company will introduce RF measurement products, covering national and provincial trunk projects, FTTx deployment, security surveillance, and routine installation and maintenance.
1. Fusion Splicers
The lineup includes the tenth-generation 260T, 300T, and 300X, the ninth-generation 280T, and the 500E Mini. The 300T is a 6-motor trunk model supporting long-haul trunk splicing; the 280T is a 4-motor middle trunk line model; the 260T and 500E target FTTx and installation/maintenance scenarios, with the 500E weighing just 1 kg for aerial work. The entire series features all-metal bodies for durability and drop resistance, along with fast splicing/heating and long battery life.
2. OTDR (Optical Time-Domain Reflectometer)
JILONG OTDRs serve installation and maintenance (I&M) of trunk fibers (core networks, MANs, mobile fronthaul and backhaul) as well as fault troubleshooting in access networks and FTTx. The KL-6100 targets FTTx installation, with a 31 dB dynamic range, event dead zone as low as 1.5m, and attenuation dead zone as low as 5m. The KL-6200 supports medium- and long-haul trunks, with a 32dB dynamic range and 1m event dead zone, and integrates an optical power meter, light source, visual fault locator, network test, and fiber inspection probe. The KL-6300 is an intelligent trunk model that immediately broke into the high-end OTDR market upon launch, boasting a dynamic range up to 45 dB, a 0.8m event dead zone, and a 2.5m attenuation dead zone — outperforming most competing OTDRs on the market. Smaller dead zones mean more precise fault localization and more accurate measurement of fiber attenuation and reflection. The KL-6100, KL-6200, and KL-6300 can detect consecutive events on 8×3 m, 9×3 m, and 10×3 m fiber patch cords respectively in fully automatic mode, placing their detection capability at the industry’s advanced level.
Notably, one key advantage of the KL-6300 is its standard iOLA (Eagle Eye) function. Imported EXFO models offer their “iOLM” feature only as an optional add-on costing an extra 2200 dollars, whereas JILONG includes iOLA as standard on the KL-6300 — free for every user.
3. Optical Measurement Instruments
The highlight is JILONG’s new 4.3-inch high-end instrument series: the OLS-33 optical light source, OPM-33V optical power meter with VFL, OPM-33P wavelength-division optical power meter, OVA-33 optical attenuator, and FOT-33 optical multimeter. This series features comprehensively upgraded performance parameters, with significantly improved accuracy and stability over the previous generation. Equipped with a 4.3-inch touchscreen and large-capacity battery, and supporting user self-calibration, it adapts to a wide range of fiber link testing needs.
4. Fiber Optic Hand Tools
JILONG offers one-step cleavers, fully automatic cleavers, and fiber connector inspection scopes, all built with CNC all-metal craftsmanship for high cutting precision and long service life. The KL-33F one-step all-metal cleaver features a premium metal body, a patented tool-free blade position adjustment, and gear-based blade rotation for quick, convenient operation. With a blade life of 72,000 cleaves, it lasts significantly longer.
5. RF Measurement
In 2026, JILONG added an RF measurement category, launching cable and antenna analyzers capable of testing cable loss, VSWR, and fault location—expanding the company’s reach into optical communication-adjacent measurement fields.
III. 100+ Core Patents, National High-Tech Enterprise
With over 30 years of R&D and manufacturing experience, JILONG holds more than 100 patents and is one of the few domestic brands in the industry to possess core invention patents. The company operates a modern industrial park spanning 21 mu (approximately 14,000 m²), including an 8,700 m² standardized production workshop equipped with CNC machining centers and professional laboratories.
In terms of qualifications, JILONG was named a national “High-Tech Enterprise” in 2011, the “JILONG” trademark was recognized as a Famous Trademark of Jiangsu Province in 2016, and its products carry international certifications including EU CE and RoHS. In 2019, the company participated in drafting the national standard for fusion splicers.
IV. 120+ Global Partners, Coverage in 100+ Countries, and Corporate Responsibility
JILONG has established long-term partnerships with over 120 distributors worldwide, with business coverage in more than 100 countries and regions, and overseas offices in Argentina, Nigeria, Brazil, Pakistan, and other locations. Domestically, the company has repeatedly won centralized procurement bids from China Telecom and China Mobile, and collaborates with universities including Nanjing University and Wuhan Railway Vocational College of Technology on research equipment, becoming a preferred brand for academic teaching and research.
On the corporate responsibility front, JILONG lives by the principle of “precision in technology, warmth in enterprise,” integrating social responsibility into its development.
– Emergency relief: In 2024, following the Gansu earthquake, JILONG responded immediately, donating nearly 15000 dollars worth of fusion splicers and instruments to the disaster area for communication infrastructure repair, helping restore vital communication channels quickly.
– Industry advancement: As a drafting unit of the national fusion splicer standard and holder of over 100 core invention patents, JILONG chose not to lock down its technology but to openly share key innovations, helping China’s fusion splicer industry evolve from a single pioneer to a thriving ecosystem—driving the overall progress of equipment through concrete action.
From the first splicer that broke the import monopoly, to emergency equipment rushed to disaster zones, to freely shared industry technology—JILONG contributes Chinese strength to the global optical communication industry through real action.
V. Lifetime “Three–Free” Services: Trustworthy Chinese-Made Quality
JILONG integrates R&D, production, sales, and service, serving both B2B customers (carriers, distributors) and B2C customers (industry practitioners) with user-friendly, convenient, cost-effective precision instruments and tools. For some of its new product series, the company offers lifetime free maintenance, free calibration, and free training, building a comprehensive after-sales service system.
Conclusion: Staying True to the Mission, Sustaining Innovation
As Chinese-made optical communication equipment enters a new stage of development, JILONG will continue to focus on R&D and product quality. Leveraging over three decades of industry expertise, the company will keep delivering equipment solutions for optical communication infrastructure, network operations and maintenance, and the global industry at large.
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JILONG Communication