Telnyx launches HD Voice in Australia

Telnyx now supports HD Voice for calls in Australia! This update adds G.722 wideband codec support on Australian numbers, increasing the audio sampling rate to 16 kHz for clearer, more detailed sound on PSTN calls.

How it works

Telnyx can now negotiate HD Voice on Australian calls. HD Voice requires both call endpoints, the SIP trunk and the caller’s line, to support the G.722 codec. When both sides are compatible, Telnyx automatically selects G.722 during call setup, enabling clearer, more natural-sounding audio without any manual configuration.

Key benefits

• Enhanced call quality: G.722 wideband enables sharper, clearer speech with greater tonal detail, improving overall communication across Australian PSTN and VoIP calls.

• Future-ready for Voice AI: High-fidelity audio provides the foundation for accurate speech recognition and AI-driven voice interactions, supporting next-generation use cases.

Why this matters

Because of a wider frequency range, HD voice allows AI voice agents, speech-to-text models, and sentiment analysis systems to detect nuances such as tone, emotion, and intent far more accurately. This leads to better transcription accuracy, faster natural-language understanding, and more human-like responses in real time.

Getting started

No setup is needed to get started with HD voice on Australian numbers. HD Voice is available by default on all Australian numbers, with no added cost. For optimal performance, ensure your endpoints support wideband codecs such as G.722.