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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.

Packet-switched core network system (vEPC)

The 4G Evolved Packet Core (EPC) is a system that provides both data and voice services over 4G networks. EPC is responsible for mobile connection management, data sessions and service policy.
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Mobile Switching Center (vMSC)

MSC (Mobile Switching Center) is the central component of the 2G and 3G softswitch system, performing switching between mobile users in the network and other networks such as PSTN, IDN and other mobile networks.
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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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Short Message Service Center (vSMSC)

SMSC (Short Message Service Center) is the central system that provides messaging services to mobile subscribers.
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Online Charging Platform (vOCS)

The ONLINE CHARGING PLATFORM (VOCS) is a convergent multi-service charging platform for mobile services from 2G to 5G, fixed services and digital services such as MySign, ePASS, Mobile Money, Cloud Charging and AI Charging.
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IP Multimedia Subsystem (vIMS)

IMS (IP Multimedia Subsystem) provides IP-based voice services for 4G and 5G networks.
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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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Viettel 5G UPF Acceleration Card (V-FAC)

V-FAC is a high-performance acceleration card designed to enhance user-plane data processing capability in the 5G Core (UPF).
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