BSNL launches Voice over WiFi (VoWiFi)

Source: PIB

Subject: Science and Technology

Context: BSNL has launched Voice over WiFi (VoWiFi) services nationwide across all telecom circles, enabling calls and messages over Wi-Fi.

About BSNL launches Voice over WiFi (VoWiFi):

What is VoWiFi?

• Voice over WiFi (VoWiFi) is a technology that allows users to make and receive voice calls and SMS over a Wi-Fi network instead of a mobile tower.

• It works using IMS (IP Multimedia Subsystem) and uses the same mobile number and phone dialer, without any third-party app.

How VoWiFi works?

• Phone connects to Wi-Fi: The smartphone uses an available home, office, or public Wi-Fi network to connect to the telecom network, instead of relying on a nearby mobile tower.

• Secure login using SIM: The user is authenticated through the SIM card, ensuring the same level of security and identity verification as regular mobile calls.

• Call routed via internet: Voice is converted into digital data packets and transmitted over the internet, allowing calls even where mobile signals cannot reach.

• Seamless switching: When Wi-Fi becomes weak or unavailable, the call automatically shifts to the mobile network (VoLTE) without interruption or call drop.

Key features:

• IMS-based service: Uses IP Multimedia Subsystem (IMS) to manage calls, enabling smooth handover between Wi-Fi and cellular networks.

• Existing mobile number and dialer: Users make and receive calls using their regular phone number and default dialer, without installing any additional apps.

• No additional charges: Wi-Fi calls are treated like normal voice calls and are provided free of extra cost to subscribers.

• Indoor and low-signal support: Ensures reliable connectivity in basements, offices, high-rise buildings, and remote areas with poor mobile coverage.

• Wide smartphone compatibility: Supported on most modern VoWiFi-enabled smartphones, requiring only a settings toggle.

• Network congestion reduction: Offloads voice traffic from mobile towers to Wi-Fi, improving overall network efficiency and call quality.

Benefits:

• Reliable calling without mobile signal: Enables uninterrupted communication in signal-dark zones, particularly useful in rural and indoor environments.

• Better call quality: Provides clearer and more stable voice calls compared to weak or fluctuating cellular networks.

• Enhanced security: Maintains strong protection using SIM-based encryption and authentication, similar to VoLTE services.