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This is where the most advanced technologies and solutions come together to deliver core services such as voice, messaging, data, and billing to customers. Key systems like the Online Charging System (vOCS), 5G Core Network (v5GC), Packet-Switched Core Network (vEPC), and IP Multimedia Subsystem (vIMS) have been widely deployed globally, creating a comprehensive telecommunications ecosystem that provides the best service experience for users.

Viettel Caller Ring Back Tone (vCRBT)

vCRBT is a service enabling users to select and change the ring-tone music of incoming or outgoing calls while waiting for a connection.
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IP Multimedia Subsystem (vIMS)

vIMS is a system providing multimedia services based on IP networks
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Packet-switched core network system (vEPC)

The Evolved Packet Core (EPC) is a system that provides converged voice and data services on a 4G Long-Term Evolution (LTE) network.
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SHORT MESSAGE SERVICE CENTER (VSMSC)

vMSC is a PBX system with the function of providing messaging services to mobile subscribers.
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Mobile Switching Center (vMSC)

A mobile switching center (MSC) is the central component of a network switching subsystem (NSS), which facilitates the switching of calls between mobile users and other fixed or mobile network users
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Online Charging Platform (vOCS)

As an Online Charging Platform solution, vOCS supports prepaid and postpaid models for 3G, 4G, and 5G mobile, fixed, IoT, content, and any other digital services (such as Mobile Money, Cloud Charging, AI Charging, etc.)
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5G Core Network (V5GC)

Viettel’s dual-mode 5G core is key to addressing the rapid and effective introduction of 5G while protecting existing services
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