"Our bandwidth problems have been practically eliminated. Monitoring & customization is a snap with the web interface."
Desert Academy, Santa Fe, USA
"We rolled out 1200 Chromebooks to classrooms and CACHEBOX is saving enough bandwidth that there's no need to increase our internet bandwidth."
Rodney Leer, Brenham Independent School District, USA
"You are the only vendor that takes the time to look at our appliances for us and it really goes a long way."
Mike Caruso, Orland Park Consolidated High School District 230, USA
"We needed to take DNS management in-house in a hurry. Without DNSBOX, we'd have been looking at several weeks"
Mike Bird, IT Director, DHL, UK
"Before deploying DNSBOX I saw the whole networks crash because someone missed out a full-stop..."
Philip Pearce, Strategic Technical Manager, E2BN, UK


SLiMtel are an independent carrier and service provider. It provides telecoms, internet connectivity, mobile and numbering services, as well as managed call termination to the global carrier community.

The Challenge

SLiMtel were asked to provide UK termination capabilities for 100 simultaneous calls for a client in Afghanistan. Each call (without VOIPBOX) required 48kbps in bandwidth to ensure no degradation in quality using G.729, and with bandwidth costing around per 1Mbps per month the cost to provide the bandwidth alone came to around per month.

The Solution

Installed an appliance at each end of the link, loaded with 100 call licence. This enabled the  delivery of 100 simultaneous G.729 calls using only 1Mbps of bandwidth, reducing the cost of the required connection by a staggering per month.

VOIPBOX ensures that 100 simultaneous G.729 calls are delivered using only 1Mbps of bandwidth without any compromise in terms of quality. In fact its unique method of QoS is so granular that jitter and latency are reduced even when using satellite connections.

Slimtel VOIPBOX diagram

In addition VOIPBOX delivers multiple failover capabilities and supports; Bonding, Encryption, Real Time Stats on the underlying link in use, and delivers significant network load reduction.

“Satellite bandwidth is the only reliable way in and out of the territory and bandwidth is expensive,” comments Kashaf Bashir, SLiMtel Managing Director. “This is a solution that exceeded our customer’s requirements with a ROI measured in days.”


  • Saving of per month
  • Increased call capacity
  • Increased call quality