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Global VoIP

Global VoIP (SIP trunk) stands for one telephony infrastructure, which is realized by combining reliable global telephony providers on one Global VoIP (SIP) platform. Through our Global Connectivity portfolio, we help to create one VoIP (SIP trunk) infrastructure worldwide, which provides a solid reliable foundation that works together with all your favorite applications in the Cloud (such as Microsoft Teams, Google or Salesforce).


One telephony environment for the entire organization

The entire telephony infrastructure from inside and outside the organization can be combined in one telephony environment for all employees.

Integrate VoIP with other Cloud applications

One environment that works with all your favorite applications in the Cloud, such as Microsoft Teams, Salesforce, etc.

Worldwide experience

Each country has its own rules and laws. With our carrier-neutral approach, we combine the VoIP (SIP trunk) solution from multiple tier 1 providers for 1 reliable global solution for flexible usage.


Retention of existing functions

We ensure that the new VoIP (SIP trunk) environment is seamlessly integrated. For instance, with the current service desk, contact center, local telephone exchange or current other systems. This way you migrate at your own pace per department or location.

Worldwide telephone numbers

Optimal accessibility with worldwide available telephone numbers, such as geographic, local, free, or paid service telephone numbers.


Worldwide 911/112 emergency services

Our services can provide 911 reachability worldwide for most countries.

Flexible, future-proof and cost-efficient

Employees can make/receive calls anywhere in the world. At home, at the office or on the road. Always available with predictable costs by following the smartest routes with tariff plans and tailor-made packages.

High availability

By independently combining different carriers and routes, it is possible to create a redundant design with availability of up to 99.999%.

“We make a difference by designing, building and proactively managing all our flexible, reliable and carrier-neutral solutions with our Professional Services.”

CEO Horizon Telecom
Melvin Jellesma

Our Professional Services

Project Management

Our project managers are closely involved in the process; from the design to the development of the solutions, including the transfer to the management organization.

Global Logistics Services

A single point of contact for shipping and handling of hardware components worldwide, incl. support with customs clearance, import duties, installation, etc.


Service Management

Our service managers proactively monitor and ensure optimal performance for the best experience for your employees by responding to trends and changes.

Global Certified On-site Engineers

Use our engineers as your own employees and deploy them globally for migrations and support at (remote) locations without having to use local technical staff/employees.

Customer Mission Control Portal

Gain insight into all invoicing and solutions worldwide (including statuses) in one portal. Designed to fit your organization’s structure and hierarchy.

Design & Engineering

Together with the (solution) architects and consultants, our engineers create a design that exactly meets the requirements of all solutions, locations, and users.

24x7 Support & Monitoring

Our Global Mission Control Centre (NOC) manages all our global solutions. Our experienced, service-oriented experts even solve issues that aren’t our responsibility.

“Horizon Telecom offers truly independent advice and we consider them part of our own IT team. Cases are dealt with promptly and efficiently. The professionals know what they are talking about.”

Hexagon (Intergraph)
Jim van Dijken, IS specialist

Communication solutions

Global VoIP

Global VoIP (SIP trunk) stands for one telephony infrastructure, which is realized by combining reliable global telephony providers on one Global VoIP (SIP) platform.


Microsoft Teams

Easily call with Microsoft Teams. We can also integrate Microsoft Teams with our Cloud Telephony solution, providing you with specific telephone exchange functions.


RingCentral Cloud Telephony

Say goodbye to telephone exchanges on location and use one future-proof solution by linking with your favorite Cloud applications for worldwide accessibility of your employees.

We are Horizon Telecom

Horizon Telecom delivers communications, infrastructure, and security solutions worldwide with 24x7 proactive support and local management. With our independent experts, we work with the world’s best technology partners to connect the aspirations of our customers with flexible and reliable solutions that leverage proven innovations accredited by Gartner®.

Globally Yours, Simply Smiling

Our added values


Independent & Carrier-Neutral


1 Tailored invoice, 1 Contract, 1 Contact, 1 SLA


Global Mission Control Center – 24x7 NOC


Professional Services


Flexible & Scalable tailor-made solutions


'Best-of-breed' technology