Communication Excellence

First-class telecommunications solutions from the pioneer and technology leader in VoIP and the oldest Internet Service Provider in Germany.

Current News

April 16, 2025

Smartphone App for iOS and Android

The CM Mobile App brings the powerful Cloud PBX and UCC features of CNT Call Manager directly to your smartphone.

March 3, 2025

Gigaset Relies on CNT

The leading manufacturer of DECT phones in Europe has chosen CNT Call Manager as its new telephone system and seamlessly integrated its own DECT infrastructure.

January 30, 2025

Motel One – CNT Call Manager in 96 Hotels

CNT Call Manager is exclusively deployed across all Motel One locations, ensuring efficient, cross-site communication.

CNT Call Manager

The only true cloud PBX with all UCC services.

Cloud communications for medium and large enterprises.

Cloud Communications

Cloud PBX
The flexibility of a true telephone system.
Cloud PBX
UCC
Conference, chat, presence – all in one.
UCC
CM App
The app for desktop and smartphone.
SIP Phones
Unlimited selection of devices.
SIP Phones
Integrations
Seamless connection to proven systems.
Integrations
Applications
Solutions for all use cases.
Applications
CNT SIP Connect
The reliable telephone connection in many countries.
CNT SIP Connect
Tariff Model
Simple, transparent, and flexible.
Tariff Model
The Foundation
Security, scalability, and flexibility.
The Foundation

Solutions

Network Services

Since 1995, CNT has provided internet access and site networking for medium and large enterprises with comprehensive availability throughout Germany and at many international locations.

Carrier Trunking

CNT offers high-quality SIP trunks as a carrier's carrier for telecommunications providers as a wholesale product – available in many countries worldwide.

CM Resale

CNT Call Manager is successfully marketed by system houses and integrators as their own product. Targeted adjustments to specific target groups maximize value creation.