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Telecommunications Voice over IP equipment pcba assembly electronics contract manufacturing services OEM CEM EMS experience company—China Shenzhen TopscomVoice over Internet Protocol (Voice over IP, VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, broadband telephony, and broadband phone service.The term Internet telephony specifically refers to the provisioning of communications services (vo