Works on defining new network architecture are carried out by such
organizations as ITU-T, Multiservice Switching Forum, and International
Packet Communications Consortium.
VIETTEL TELECOM
Viettel Group is one of leading telecom service providers in the world with over 50 million subscribers. Wireless Intelligence has ranked Viettel Group as the 19 th out of 784 biggest telecom service providers in the world regarding the number of subscrib
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