Sonus turns ordinary ringback tones into unforgettable experiences. Built for telecom operators, content creators, and brands — transforming the ringback moment into a space for expression, connection, and monetization.


Sonus is a next-generation Caller Ring Back Tone (CRBT) platform that redefines how people experience phone calls. It blends personalization, entertainment, and promotion — letting every ring tell a story.
From individual tone dedications to full-scale brand campaigns, Sonus bridges creativity and technology to create a richer, more human calling experience.
Every ring, uniquely yours
Engage with every call
Brand moments at scale
New revenue streams
Powerful capabilities tailored for every stakeholder in the CRBT ecosystem
Express Yourself in Every Ring
Love what you hear? Press one key to make it yours instantly.
Send songs or personalized tones to friends and loved ones.
Celebrate birthdays, holidays, or moments that matter.
Rotate tones daily or by mood.
Surprise friends with tones or theme packs.
Manage tones anytime via app, USSD, or web portal.

Every call becomes a personal soundtrack.
Engage. Retain. Monetize.

Run seasonal, event-based, or targeted tone campaigns.
Launch targeted AI-guided campaigns that boost ARPU.
See real-time BI on tone adoption, revenue, and audience trends.
Use smart nudges to reduce churn and lift satisfaction.
Launch sponsored tones or pre-announcement ads for brands.
Subscriptions, pay-per-tone, freemium, or ad-sponsored models.
Real-time reports on tone popularity, usage, and revenue.
Offer tones via SMS, IVR, app, or portal.
Sonus turns engagement into revenue — seamlessly.
Your sound. Your reach. Amplified.
Understand your audience with clear engagement analytics.
Prove ROI with campaign lift and reach metrics.
Optimize releases with data-backed recommendations.
Upload, promote, and manage tones through a secure API.
Schedule releases, contests, or promotional tone drops.
Measure engagement, reach, and tone adoption.
Add your sonic identity to millions of daily calls.
Transparent, automated partner payouts.

Your sound. Your reach. Amplified.
Each caller hears something unique.
New revenue streams through tones, ads, and gifting.
Turn every call into a micro-campaign moment.
APIs, plug-and-play tools, and ready deployment.
Built for VoLTE, 5G, and cloud operators.
2.4M
$847K
125K+ Tones
Tailored solutions that deliver value across the entire CRBT ecosystem
We believe every ring can create value — emotional, cultural, and commercial.
Sonus transforms those few seconds before "Hello" into a canvas for creativity and connection.
Sonus Systems — Turning every ring into a story.
Let's turn call waiting into your next growth channel.