Leading Global Provider of Wholesale Voice Solutions
Your trusted wholesale voice carrier for smooth international calls. High-quality voice termination, direct CLI and non-CLI routes, plus competitive global rates for telecom carriers, VoIP providers, and call centers.
Why Industry Leaders Choose Rozper
Carrier-Grade Quality
Crystal-clear audio and reliable connections backed by our premium QoS network and 99.99% uptime SLA.
Transparent Pricing
Cut operational costs with competitive rates and volume discounts — no hidden fees, no aggregator markup.
Global Reach
Reliable call termination to 200+ countries through our direct carrier interconnect network.
24/7 Expert Support
Instant access to engineers and account managers — real humans, not bots, around the clock.
Discover Our Key Wholesale Voice Solutions
A-Z VoIP Termination
Take advantage of our reliable A-Z VoIP termination for seamless global call delivery.
SIP Trunking
Connect your IP-PBX with flexible, scalable wholesale SIP Trunking — keep your existing hardware.
DID & Toll-Free Numbers
Instantly establish a local presence with our extensive range of DID and toll-free numbers in 150+ countries.
UCaaS & CPaaS Integration
Embed our dependable voice infrastructure into your UCaaS or CPaaS platform via API.
Designed for Unmatched Performance
Our infrastructure ensures maximum reliability with built-in redundancy and automated failover protocols, delivering exceptional uptime backed by our SLA.
Complete Control with Advanced Technology
Smart Routing
Advanced algorithms evaluate network conditions, costs, and quality metrics in real time — every call takes the most efficient path automatically.
Real-time Analytics
Intuitive dashboards with instant insights into call quality, volume, costs, and performance across all destinations — live, not in a monthly PDF.
Fraud Detection
AI-driven monitoring watches traffic patterns, flags anomalies, and automatically blocks suspicious activity before it reaches your network.
Carriers route smarter with Rozper
“Moving A-Z termination to Rozper lifted our ASR by six points and the margin tooling paid for itself in the first month.”
“Rozper's wholesale voice network gives us exceptional call quality and the peace of mind we need to serve our own customers flawlessly.”
“The per-second CDR feed dropped straight into our mediation system. Reconciliation went from days to minutes.”
FAQ
What's the difference between wholesale and retail VoIP?
Wholesale VoIP offers bulk rates for carriers and large-scale users, while retail VoIP caters to individual customers with a focus on user-friendly services. Wholesale buyers get carrier-grade pricing and direct interconnects — retail buyers get a polished end-user experience.
What is A-Z Termination?
A-Z Termination is the process of completing international calls from any origin (A) to any target destination (Z), ensuring global connectivity. Rozper maintains direct carrier interconnects across 200+ countries for end-to-end delivery.
Can I connect my current PBX system to your service?
Yes — our SIP Trunking connects directly to your existing IP-PBX over a standard SIP/TLS link. No hardware replacement needed. Most interconnects are live within a business day.
How do you maintain high call quality?
Every call is scored for ASR, ACD, and PDD in real time. You set quality floors per route — when a path drops below them, traffic re-routes automatically and you get an instant alert. Our NOC monitors 24/7.
Is your service scalable for a growing business?
Our infrastructure scales automatically with your traffic — no capacity pre-ordering, no re-provisioning. Start on a trial corridor, prove the quality, and grow from there. Volume pricing improves as you scale.
Get a Custom Rate Card
Share your traffic details — we'll respond within one business day with a tailored A-Z rate deck.