Telecommunications billing systems

Huawei Technologies Co., Ltd. (sometimes stylized as HUAWEI; ; ) is a Chinese multinational corporation and technology company headquartered in Longgang, Shenzhen, Guangdong. Its main product lines include telecommunications equipment, consumer electronics, electric vehicle autonomous driving systems, and rooftop solar power products. The company was founded in Shenzhen in 1987 by Ren Zhengfei, a veteran officer of the People's Liberation Army (PLA).

Amdocs Limited () is a multinational telecommunications technology company headquartered in Chesterfield, Missouri. The company specializes in software and services for communications, media and financial services providers and digital enterprises. Amdocs was founded in 1982 and is publicly traded on the Nasdaq stock exchange.

Convergys Corporation was a corporation based in Cincinnati, Ohio, that sold customer management and information management products, primarily to large corporations. Customer management products included agent assisted, self-service and care software tailored to the communications, financial services, technology, retail, healthcare and government markets. Information management provided convergent billing and business support system (BSS) products and services including revenue management, product and order management, and customer care management to telecom, utilities, and cable/satellite/br

group of processes of communications service provider dealing with payment of services