Spirent is a UK multinational communication testing company, the leading global provider of communication testing instruments and testing solutions. It is headquartered in Crowley, West Sussex, UK. Its stock is listed on the London Stock Exchange .

Spellen was founded in 1936 by Jack Bowthorpe as Goodliffe Electric Supplies. In 1949, the company was renamed Bowthorpe. It acquired Optima Electronics in 1987 and canceled its defense operations in 1990. The company's electronics business grew rapidly during the 1990s network epidemic, purchasing telecommunications analytics systems in 1995 (based in Eaton, New Jersey, USA) and in 1997 a digital testing device Adtech was purchased. In September 2014, Spellen announced the acquisition of Mobilethink A/S and its wholly-owned subsidiary Tweakker ApS, and provides mobile device management, device analysis and intelligent solutions for mobile operators.

Business: Spirent's innovative product and service portfolio can meet the challenges of testing, assurance and automation of a variety of new generation technologies: 5G, SD-WAN, cloud, autonomous vehicles, etc.

Client: Every year, Spellen provides guarantees for more than 1,500 customers around the world to fulfill their promises to their customers, covering a variety of industries including communications, transportation, government, defense, aerospace, financial services, health care, retail, and other industries.

Solutions: Spellen’s cyber, cybersecurity and positioning experts have been working closely with customers to listen to their needs and provide numerous solutions covering the entire technology lifecycle from lab to real-life deployment. These solutions can help customers develop and deploy next-generation network technologies smoothly, such as broadband services, IP phones, 3G, web applications, and security testing. Sibron is a leader in Ethernet, VoIP, VPN, TriplePlay, CDMA technology and application testing.

Sibolun has set up representative offices in Beijing, Shanghai and Guangzhou, China, and established the "Sibolun Communication Technology Service and R&D Center" in Beijing, mainly for telecom operators, communication equipment manufacturers, large enterprises, and research and development institutions. The He Evaluation Laboratory provides advanced communication testing equipment, professional testing technical services, and related testing software and script research and development, providing network equipment development, technical research, network access testing, equipment selection, network operation and maintenance, network optimization and media public testing. An indispensable tool.