A group of users can be created with a purpose of receiving voice announcements through the speaker of a telephone set, but it has to be in the waiting mode.
VASC is a child company under VNPT (Vietnam Post and Telecommunications Corp)- the biggest state-owned corporation in Vietnam. Besides doing VAS for mobile, content and data service, software, IPTV….. VASC is also offering Vietnam termination for VoIP s
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