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Telecommunications

 
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Thursday, 02 April, 2020
SIP Trunk Service Provider - A-Z Telecom Ltd. (Mong Kok) **[SIP trunk service provider][1]** is a type of service which enables businesses that have installed PBX to use real-time communication VoIP included. When this trunk is connected to a traditional public switched telephone network (PSTN) system, a compan...