Colt has a wide portfolio of business phone lines & systems with a broad international coverage now extended to 29 countries in Europe, Asia, Australia, and North America.

SIP/ISDN services
Colt Voice portfolio delivers reliable and affordable carrier and enterprise business grade services to enterprises.

Unified communications
Colt provides flexible and scalable unified communications solutions as a service, fully managed end-to-end.

IN Services
Colt Intelligent Network (IN) Services is a managed portfolio of inbound voice services that provide our customer’s callers with an improved user experience, whilst maximising the performance of the customer’s call centre.
| Business phone numbers
| Contact centre solutions
| Voice On Demand

Contact centre as a service
Easy to deploy omni-channel solutions to build meaningful customer relationships, with a remote workforce.

Service provider solutions
A portfolio of comprehensive Wholesale VoIP propositions addressing the needs of Carriers, Resellers and Service Providers.
| White label solutions
| Number hosting
| IN over Carrier VoIP
How Colt solves the challenges of providing international voice services:
Your one-stop shop
It's difficult to work with multiple providers across your countries, so Colt is your one-stop-shop for your global voice needs
Full regulatory compliance
We offer full regulatory compliance across all our geographic regions, saving you time and complexity
Quick time to market
React to changing demands with ease - add new telephone numbers to your service in just 3 days
Extensive coverage
We can support your expansion with developed markets across 4 continents & 29 countries.
As a phone system provider, we serve enterprise, reseller and wholesale businesses with a tailored service wrap and is ideally positioned to meet the growing global challenges of our customers. We deliver flexible - with on-demand services - and resilient all-catering capabilities for our enterprise services, while at the same time we offer completely automated solutions for our carriers and resellers.
Colt voice services portfolio includes outbound voice services to connect to enterprises’ PBXs – either traditional ISDN services or SIP Trunking – as well as inbound voice services (e.g. 0800 Freephone) that include value-added customer contact centre services. As enterprises are increasingly looking at moving their communication infrastructure to the cloud, we provide unified communications as a service solution as an alternative to customer-owned premise-based PBX.
Contact us about:
Voice Services