HD Direct

HD Direct from CarrierX delivers inbound and outbound calling over direct interconnections to major US carriers, currently including AT&T, T-Mobile, and Verizon.

Why HD Direct?

Unlike traditional VoIP routing, HD Direct eliminates intermediate hops by putting you on-net directly with carriers on the HD Direct Network. The result is better audio quality, lower latency, and stronger call integrity.

HD Audio

All calls on the HD Direct Network use the AMR-WB codec (G.722.2) for wideband audio. Codec negotiation is handled automatically: if your network does not support HD audio, calls are transcoded transparently.

STIR/SHAKEN

With end-to-end IP connectivity, HD Direct preserves STIR/SHAKEN attestation information throughout the call path, helping ensure call integrity and reducing spoofing risk.