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Microphone
HD capture with echo cancellation and automatic gain control before the audio ever leaves the device.
ActivVoice HD Technology
The voice quality your clients judge you by. Make it perfect.
ActivVoice HD is VoxSun's proprietary voice layer — verified caller ID, encrypted media, and AI-enhanced call routing on every call, on every plan. Built on VoxSun's carrier infrastructure rather than relying exclusively on third-party communications APIs.
- MOS ≥ 4.0
- Wideband audio quality
- < 20ms
- Jitter control
- < 800ms
- AI voice latency
- Cert. A
- STIR/SHAKEN attestation
Audio Demo
Hear the difference.
Same caller. Same sentence. Same device. Hear what carrier-grade voice quality sounds like.
Both recordings were captured using the same speaker and the same script. The only difference is the carrier infrastructure.
Side by Side
Why ActivVoice sounds better.
| Feature | Standard VoIP | ActivVoice HD |
|---|---|---|
| MOS Score | 3.2 – 3.8 | ≥ 4.0 |
| STIR/SHAKEN Attestation A | B or C | Yes — 8 countries |
| Media Encryption | Optional | SRTP AES-256 |
| Jitter Control | Basic | Adaptive · < 20ms |
| AI Optimized | Yes | |
| Carrier Infrastructure | Leased / 3rd party | Owned |
| Direct Carrier Interconnects | Yes | |
| Call Authentication | Limited | Carrier Level |
Infrastructure
The call path, end to end.
CustomerVoxSun EdgeCarrier NetworkActivVoice HDDestination
Built on VoxSun's carrier infrastructure rather than relying exclusively on third-party communications APIs. Every hop is owned, monitored, and optimised for voice.
Why Calls Sound Better
From microphone to listener — every stage is engineered for clarity.
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Wideband Codecs
G.722 wideband audio carries 50Hz–7kHz — more than double the frequency range of standard VoIP.
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Noise Suppression
Intelligent filtering removes keyboards, traffic, and background chatter without distorting the voice.
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Carrier Routing
Direct carrier interconnects mean fewer hops, lower latency, and no third-party quality degradation.
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ActivVoice HD
Adaptive jitter buffering and MOS ≥ 4.0 processing keep every conversation stable and natural.
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Listener
What arrives is clear, natural, full-spectrum audio — on desk phones, mobile, and softphones alike.
“ActivVoice immediately improved call clarity and noticeably reduced customer complaints. Our team stopped asking callers to repeat themselves — and our recordings are finally clean enough to coach from.”
Who Benefits Most
Industries where call quality changes outcomes.
Real Estate
Long discovery calls and demanding negotiations — HD clarity keeps prospects engaged and every detail heard.
Call Centers
Lower listener fatigue, fewer repeats, and cleaner recordings for QA and agent coaching at scale.
Legal
Wideband audio for depositions, client calls, and transcripts — with recordings clean enough to rely on.
Healthcare
Clearer patient conversations, accurate transcriptions, and encrypted media that fits regulatory workflows.
Financial Services
Verified caller ID on outbound calls, call authentication, and compliant recording for every client interaction.
International Teams
Direct interconnects across North America, Europe, and Africa — clearer transatlantic calls without extra noise.
What ActivVoice Delivers
Four layers of voice technology — built into every call.
Wideband HD Audio (MOS ≥ 4.0)
Standard calls are narrowband audio (300Hz – 3.4kHz). ActivVoice HD uses wideband codecs (50Hz – 7kHz) — delivering more than double the frequency range on the ITU-T P.800 quality standard, on every plan.
STIR/SHAKEN Certificate A — 8 Countries
VoxSun holds STIR/SHAKEN Certificate A in 8 countries: US, CA, FR, UK, IE, BE, ES, CH. Calls without Cert A increasingly show as 'Spam Likely' or get blocked. VoxSun signs at carrier level — not through a third-party API.
SRTP AES-256 Encryption
All voice media is encrypted end-to-end using SRTP with AES-256. Signaling runs over TLS. Encryption is included on every plan — never a paid add-on or an optional setting.
Intelligent Noise Suppression
Background noise is filtered at the carrier level. Office noise, HVAC, traffic, and call-center chatter are suppressed before the audio reaches the other side, so the voice stays natural and easy to follow.
Inside the Product
Voice quality you can measure. Conversations you can review.
Call Quality Analytics
Monitor MOS score, jitter, packet loss, and call quality per user and per location — at carrier level.
Call Recording Interface
Review HD recordings, jump back and forth, and share clips with your team for QA and coaching.
AI Call Transcript
Every conversation transcribed and summarized automatically — searchable and connected to your CRM.
Live Transfer Dashboard
Transfer AI conversations to a human agent in one click, with full context and HD-quality audio.
Live Demo
Test ActivVoice on your own phone.
Enter your number. We'll call you in 10 seconds so you can hear ActivVoice HD yourself.
ActivVoice FAQ
Everything you wanted to know about voice quality.
MOS (Mean Opinion Score) is the ITU-T P.800 standard for measuring perceived voice quality, from 1 (bad) to 5 (excellent). Most VoIP providers deliver between 3.2 and 3.8. ActivVoice HD delivers MOS ≥ 4.0 on every call — the difference between 'phone quality' and 'in-the-room quality'.
Stop reading about voice quality. Hear it.
Book a demo or get a live ActivVoice HD call on your own phone — and judge the difference yourself.
- MOS ≥ 4.0 wideband audio
- STIR/SHAKEN Certificate A
- SRTP AES-256 encryption
- Carrier infrastructure since 2010