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About us

We consistently digitalize
telecommunication companies

Who we are

We are Carrier Call, Europe’s most powerful provider of ICT automation and digitalization solutions in the fields of carrier interconnection, wholesale trading, traffic management, switch provisioning, mediation, billing and reliable fraud detection and prevention.

Our XCarrier platform and application modules enable telecom carriers to generate positive margins in a highly volatile carrier market environment. Deploying the XCarrier platform puts our customers’ core switching infrastructures and interconnection links to other wholesale providers to optimum use. Our solutions and the associated services have been impressing our customers for years due to their modular structure, flexible configuration management and incomparably efficient operation.

With configurable adaptations, XCarrier can be quickly introduced and deployed in other industries, such as the utilities sector (e.g. electricity, gas or water). Our solutions process the highest volumes of master and transaction data in record times.

Our Mission

We ensure that wholesale carriers can digitally determine, optimize and securely manage their business with our application and development platform XCarrier.
This enables them to secure and optimize revenue streams and margins in the highly dynamic telecom market. In addition to the XCarrier applications and customer-specific applications, our professional services and the associated system integration complete the Carrier Call offering.

Our Philosophy

We don’t compromise on convincing results. That’s why we consistently tread our own path and deliver above-average performance.

We pursue our independent goals.

We want to be the first choice for telecom carrier customers looking for a seamless, profitable and fully automated digital business.

We aim to deliver outstanding software solutions and services that enable the greatest possible efficiency, as well as operational and commercial security.

We attach a great deal of importance to nurturing a close and trusting cooperative relationship with our customers and promoting open and transparent dialog. Our long-standing customer relationships are testament to our strong commitment to providing innovative, flexible solutions in a timely and cost-effective manner.

We focus exclusively on what our customers need. We are passionate about providing the best service for each and every customer and supporting them so that they can position themselves as leaders on the market.

We deliver and operate what we promise: high quality, on time and on budget. Simply Swiss precision!

Our team

Our team boasts impressive, internationally known and extremely experienced individuals. The company is divided between software development, consulting and application engineering and obligatory business administration.

Across all our departments, our staff maintain a customer-centric outlook so that we can provide dedicated personal service to our customers and teams alike.
We only procure external services from external partner companies where necessary – when doing so is more efficient and makes sense.

Management

Martin Christen

CEO

Martin Christen is a founding member and partner of Carrier Call AG. He heads up the Development Division and the Professional Service Division.

He started his career as a software engineer and management consultant at ATAG Ernst & Young. This was followed by a longer period spent working at Colt Telecom, where he was Senior Manager for Retail and Wholesale Billing. Martin was the key driving force behind integrating and automating the complex, heterogeneous billing and associated system platforms in the international Colt environment. Together with his team, he built the first OSS and BSS solution framework for Colt Telecom.

Martin holds a Master of Science in Industrial Engineering & Management and a Master Diploma in Software Engineering & Development from Bern University of Applied Sciences (Switzerland).

Markus Wehinger

COO

Markus Wehinger is a founding member and partner of Carrier Call AG. He is responsible for the entire Infrastructure, Sales and Administration Division.

Markus was part of the Management team at Colt Telecom, where as IT & Infrastructure Director he was responsible for the entire IT and telephony infrastructure, among other things. Systems integration and automation of the IP and PSTN networks in Colt’s southern region were carried out under his leadership. Before working for Colt, Markus served as CIO & Global IT Director at The Fantastic Corporation. He was responsible for the global communications and IT infrastructure.

Markus holds several diplomas in IT, management, software development and security.

Kurt Eggler

CTO

Kurt Eggler is a member of the Executive Board of Carrier Call Ltd. and leads the technology and development units as CTO.

Kurt joined Carrier Call in 2010 as Development Director and has been CTO since January 1, 2025. From 2000 to 2010, Kurt developed several database applications as an application support engineer at Colt Telecom. He managed projects in the billing and voice switching area and was responsible for the operation and further development of the data warehouse solution.Before that, he was a developer and team leader in IT at Ascom/Ericsson.

Kurt holds a Bachelor of Science in Electrical Engineering from Bern University of Applied Sciences and has continued his education, particularly in Oracle technology.

Customers and Testimonials

Our customers include leading European telecommunication corporations and groups. They have been relying on our XCarrier platform and our reliable professional services for years.
Our reference customers are Vodafone (Vodafone DE, Vodafone UK, Vodafone Kabel Deutschland, Vodafone Unitymedia), 1&1 Versatel, Sunrise UPC and Colt Technology Services.
Vodafone
Versatel
Sunrise UPC
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References

Facts and Figures

We’re entrepreneurs. That means we have been constantly keeping busy, making decisions and purposefully tackling outstanding issues since 2003.

Carrier Call AG is a privately held joint stock corporation under Swiss law. The company was established by Martin Christen and Markus Wehinger as a limited liability company (GmbH) and converted to a joint stock company (Ltd) in 2019.

We are a completely independent entity, both from a technological and a commercial standpoint. Freedom of choice is and will remain a key issue for us. We’ve been managing the company as entrepreneurs since it was established, ensuring that customers are given the long-term guarantee that both our organization and our solutions will develop sustainably in the long term.

Development

2025

Carrier Call launches the XDash and XValidate applications

2024

Carrier Call is the first in the market to launch the XCarrier Cloud Digital Support System for SMEs and cloud-oriented companies

2021

Vodafone DE integrates Unity Media and also uses the XCarrier platform for its voice business

2020

Vodafone consolidates its business in Germany and uses XCarrier

2019

Change of the legal form from Carrier Call GmbH to Carrier Call AG/Ltd.

2018

Vodafone UK selects XCarrier as its central voice management tool

2017

Vodafone Germany deploys XFraud

2015

UPC Austria deploys XFraud to protect customers

2014

Versatel AG deploys XFraud, Kabel Deutschland migrates to NG voice platform using XCarrier

2013

UPC Switzerland and Versatel AG deploy XFraud to protect their voice platforms

2012

Versatel AG enhances the XCarrier system for its NG voice platform

2011

Colt Technology Services rolls out XCarrier for their voice business

2010

mr.net selects XCarrier as managed service

2008

Versatel AG rolls out XCarrier for its voice business

2007

Kabel Deutschland selects XCarrier platform for its voice business

2005

Carrier Call becomes a limited liability company (GmbH)

2004

First consulting activities at Cablecom, Switzerland

2003

Start of Carrier Call activities and first version development of XCarrier

Swiss Made Software
The "Swiss Made Software" label is dedicated to promoting the Swiss software industry, both at home and abroad. It combines Swiss values such as quality, reliability and precision – especially in software development.

Swiss Made Software

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