• A Strategic Initiative to Advance America's Telecommunications Infrastructure

HD Voice Access for Mobile Operators

Signed CLI. HD Audio. Direct U.S. Termination for Mobile-Originated Voice.

Overview

As mobile-originated voice enters the next era of regulation and quality assurance, international MNOs, MVNOs, and mobile voice platforms are under pressure to deliver more than just connectivity—they must deliver clarity, compliance, and carrier-grade credibility. U.S. networks now demand signed caller identity, full SIP header transparency, and voice quality that meets Tier-1 expectations. Without that, even legitimate traffic risks being downgraded, delayed, or rejected outright.

 

USTelco HD Voice for Mobile Operators is purpose-built for this environment. It offers mobile carriers a direct, private ingress into the U.S. telecom backbone—featuring end-to-end AMR-WB high-definition audio, STIR/SHAKEN CLI attestation, and zero-hop SIP routing across USTelco’s geo-redundant infrastructure. This isn’t an internet voice overlay or a generic SIP trunk. It’s a purpose-engineered path for delivering high-fidelity, verified voice into the U.S. PSTN and Tier-1 networks—optimized for call centers, VoWiFi, eSIM applications, and SIP-based mobile voice cores.

 

Whether your platform is app-based or IMS-backed, hosted or cloud-native, USTelco ensures your voice traffic arrives in the U.S. signed, trusted, and in high definition—without degradation, delay, or compromise.

Mobile operators worldwide choose USTelco HD Voice because quality isn’t just heard—it’s proven, packet by packet.

Who This Is For

USTelco HD Voice supports qualified mobile voice infrastructure teams seeking direct, compliant access to U.S. carrier networks:

Mobile Network Operators (MNOs)

Mobile Virtual Network Operators (MVNOs)

Voice-Enabled eSIM / VoWiFi / Mobile Apps

What You Get

CapabilityDelivered with USTelco HD Voice
STIR/SHAKEN CLI SigningFull attestation (A/B) at ingress
AMR-WB HD AudioWideband audio preserved from source to edge
Tier-1 SIP TerminationDirect handoff to AT&T, Verizon, and T-Mobile
Geo-Redundant SIP IngressNYC, Ashburn, Miami, Dallas, Chicago, LA
CLI Monitoring & Trust ScoresSIP-layer visibility + U.S. network analytics
FCCMeets traceback, RMD, and CLI verification standards
Encrypted Media & SignalingTLS/SRTP by default

Interconnect Options

Connect to USTelco via the following production-grade options:
All ingress points are monitored 24/7 by USTelco’s NOC and provisioned with active-active redundancy.

Real-World Results

Case Snapshot: A European MVNO delivering voice via a hosted IMS platform and Equinix Fabric interconnect migrated to USTelco HD Voice for all U.S.-bound traffic. Within 30 days:

Performance Metric Outcome via USTelco HD Voice
CLI Trust Score (U.S. Carriers) +18–25% uplift
Answer Rate / Completion +15–22% increase
Codec Downgrade or Transcoding Eliminated (AMR-WB preserved)
CLI Spoofing or Attestation Failure Resolved with verified STIR/SHAKEN tokens

Getting Started

To begin provisioning, please submit:

You’ll receive:

Ensure your mobile voice enters the U.S. with integrity, fidelity, and full carrier trust.

USTelco HD Voice is the preferred ingress for mobile operators seeking high-performance, high-trust U.S. voice termination. We don’t just deliver calls—we deliver them signed, authenticated, and crystal clear.