• Advanced Interoperability Partner

    The advanced interop level is targeted on PBX functionality. Advanced features as transfer, Music on Hold, etc. are required to work, to get this certification level. With a partner gaining this level you can be assured that the following tested functionality works smoothly.

    Additional to the basic interop tests the following functions undergo a testing:

    • VoiceMail integration
    • attended/unattended transfer
    • Music on Hold
    • Busy lamp field
  • Solution size

    SME - small to medium size solution

    Enterprise solution

    large enterprise - carrier grade solution


3CX develops a Windows based IP PBX, 3CX Phone System for Windows, that fully adheres to the SIP standard. 3CX, a European company with offices in the USA, London, Cyprus and Hong Kong, is a Microsoft Gold Partner.

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4PSA is a leading innovative software development company, specializing in applications that run on computer clouds. The company provides, under the 4PSA brand, solutions that help service providers and enterprises better manage their IT infrastructure, automate processes, and provide improve communications services.

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Since 3 years, AMIRITEL innove with one philosophy: simplicity. Close to its users, AMIRITEL’s solutions of communication are adapted to different types of companies. Thus, beyond its material solutions, a great range of software is also proposed.

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AndreXen is a software provider designing carrier-grade, redundant, and high availability Unified Communication platforms. Solutions come with a wide range of features such as mobile VoIP, audio/videoconferencing, advanced IP telephony, presence. AndreXen patented software dramatically reduces ROI at both service provider and end-user side, through Plug’n Talk ® technology.

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Askozia provides a highly intuitive telephone system for businesses. This is accomplished by combining our popular software AskoziaPBX with standard PC hardware or numerous embedded platforms. AskoziaPBX is incredibly easy to use, supports VoIP, ISDN, analog and GSM, is multilingual and costs less than a single VoIP phone.

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Telefonieren Sie nicht irgendwie - telefonieren Sie komfortabel, übersichtlich und einfach mit einer Astimax® IP Telefonanlage! Unsere Kunden begeistert immer wieder die einfache und übersichtliche Bedienung der Anlage, egal ob Astimax® User- oder Astimax® Admin Interface. Durch das Zusammenspiel der Astimax® Anlage mit den snom Telefonen wird die perfekte Symbiose aus Anlage und Endgerät erzielt. So ist beispielsweise das Astimax® Telefonbuch direkt aus dem snom Telefon erreichbar.

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Avencall pushes the boundaries of the telecommunications industry by providing free, creative and scalable telephony solutions for all size companies. This success story was made possible through Avencall’s team collaboration, expertize and know-how. Avencall is the publisher and integrator of XiVO, full and open source unified communication systems for business under GPLv3 license. This powerful and scalable solution offers a set of features for corporate telephony and call centers to power their business. In 2012, XiVO has been awarded by Digium as the First Communication Solution based on Asterisk in EMEA.

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bevuta IT - professional VoIP-solutions

bevuta IT is a telecommunication and computer services company with a special focus on Voice over IP. Today the company, having a background of two decades of IT projects, implements individual VoIP telephone systems based on the Open Source Software Asterisk, develops a VoIP appliance as a standard solution, offers a hosted PBX solution and is a VoIP telephony provider.

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An award-winning product, Brekeke PBX is a SIP-based IP-PBX system for call centers, enterprises and service providers. Brekeke PBX solutions are cost-effective and provide flexibility to meet each telephony system's requirements. Brekeke PBX comes in two editions: Basic Edition with traditional telephony features and Pro Edition which includes a full set of Call Center features. Brekeke PBX provides trouble-free telephone systems for any organization. Supports both Windows and Linux platforms.

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Broadsoft - Broadworks Plattform

BroadWorks is the industry's leading VoIP applications platform and provides revenue-generating voice features for fixed-line and wireless service providers. BroadWorks offers the widest array of applications from a single platform, including Hosted PBX, Mobile PBX, Business Trunking, IP Centrex, and Residential Broadband. BroadWorks delivers these applications with carrier-grade interoperability, back office capabilities, redundancy, and scalability.

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Clarity AG

Clarity AG is a multi-awarding manufacturer of software-based telephone systems. Customers include call centers, medium-sized companies and large corporations. The freely scalable telecommunication systems are extremely flexible: they can be integrated into existing systems, are suitable for companies of all sizes and can grow in line with changing tasks. The solutions are equipped with a wide range of innovative features, which simplify processes, improve service levels and help to reduce costs.

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CONTELIO® Unified Messaging - Der neue Maßstab für moderne Unternehmenskommunikation


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CordiaCorp - CordiaIP

Cordia Corporation, through its operating subsidiaries, Cordia Communications Corp., CordiaIP Corp., My Tel Co, Inc., Northstar Telecom, Inc., Cordia Prepaid Corp., and Cordia International Corp. offers business, residential, and wholesale customers local and long distance telecommunications services in more than sixty (60) countries utilizing traditional wireline and Voice over Internet Protocol (“VoIP”) technologies.

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Crown Software GmbH

Crown is a German software as a service provider and offers leading technologies, extremely reliable services and extensive know-how concerning successful VoIP business. The result is a complete industry-specific solution for Internet service providers and carriers.

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Coca-Cola, FedEx, Harvard University, IBM, L'Oreal, and Europcar, are amongst the more than 70,000 organizations protecting their networks with Barracuda Networks solutions. The company is privately held with its international headquarters and manufacturing facility based in Campbell, California. Barracuda Networks has offices in 10 international locations and distributors in more than 80 countries worldwide.

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CYTEL is well known for the development of its innovative software products, and for its high-performance, powerful and stable server systems for Fax, Voice, IVR, ACD, VoIP and call center solutions. With CXTEL.iBX, the company offers one of the most efficient IP-telecommunications systems in the world, based on Microsoft® Windows®. 

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Datus AG

The DATUS product family indali IP PBX covers the market requirements of small, medium and large enterprise fields for IP based PBX systems. The available systems indali S and indali M allows the access or the migration to VoIP-telephony, without loss of the functionality, comfort and quality of the proven ISDN surroundings. It convinced the symbiosis of snom IP phones and indali IP PBX. 

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Digium - Asterisk

The days of expensive proprietary telecom software are over. Asterisk solves a wide range of challenges, from common PBX and key system replacements to highly-specialized applications at a fraction of the price of traditional systems.

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Epygi Manufactures Voice over IP Technology for Small to Medium Businesses WorldwideEpygi Technologies designs, manufactures and distributes globally feature-rich IP PBXs, voice over IP gateways and cost-saving conference servers. The privately held U.S. corporation was founded in 2000. 

The company employs more than 125 engineering, administrative and marketing professionals and makes its headquarters in Plano, Texas, a municipality in the Dallas-Fort Worth metro area. 

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ESCAUX - Unified User and Administrator Experience

The proven leader in Unified User Communication, ESCAUX empowers customers to stand out from the crowd. We do so by delivering the most innovative Open & Standard technology and making it as easy as possible to communicate with multiple devices and integrate with multi-IT software environments. The deployment and management of a Unified Communication solution.

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IBM NGN Factory

The IBM NGN Factory VoIP solution offers a wide range of functionalities for use in medium-sized and large companies and in telecommunications carrier segment. Basic telephony features such as flexible call forwarding , simultaneous ringing as well as advanced ones like manager-secretary, call-pickup et al. known from PBX, are supported. 

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Supporting VoIP Service Providers in over 63 countries, IPsmarx Technology has been providing feature rich VoIP solutions since 2001. Their Class 4 & 5 Softswitch Solutions and Multi-Tenant IP-PBX Platform with integrated billing have earned them worldwide acclaim.

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MetaSwitch delivers applications and switching solutions for both packet and circuit-switched networks. These include hosted IP communications services, in conjunction with a suite of products to support a full range of Class 4/5 softswitch capabilities.

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Founded in 1975, Microsoft (Nasdaq “MSFT”) is the worldwide leader in software, services and solutions that help people and businesses realize their full potential.

Microsoft Office is the business world’s chosen environment for information work, providing the programs, servers, and services that help you succeed by transforming information into impact. As part of the Office platform, Microsoft Lync increases user productivity through communications convergence on a familiar platform and infrastructure.

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Objectworld - Unified Communication Server

Objectworld UC Server™ is more than just your new phone system.

It’s your new competitive advantange UC Server is the only low-cost, all-in-one VoIP phone system fully integrated with Microsoft Windows. UC Server delivers all the features and benefits of CallAttendant Office with a complete, easy to manage SIP-based VoIP phone system.  

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pascom - MobyDick

pascom presents the MobyDick– Server, a modern and fully featured communication server. Based on standard PC-hardware combined with the innovative opensource software Asterisk we develop professional business solutions fit to your company. All you need to enjoy the future of telephony.

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Protalk - SARK

SARK UCS/MVP is an advanced, integrated, Asterisk-based PBX, with a browser GUI component, a SIP provisioning system and an Asterisk code generator, all from the same authors. One User-ID, One Password, One Interface.

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reventix is specialized to solutions in innovative communication for medium-sized companies. It is a German leading provider in VoIP (Voice over Internet Protocol). reventix united information and telecommunication solutions to a new high-performance service level.

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Schmooze Com

Founded in 2008 by a core group of communications architects and VoIP experts, Schmooze Com has always had one goal, simplifying the corporate phone system. Our PBXact premise based PBX solution has gained industry wide recognition for its unprecedented feature set and usability. We also offer PBXtended, a Hosted PBX with the same great feature set. Schmooze Com is proud to power unified communications in all types of organizations from small businesses to call centers. We pride ourselves on constant innovation and relentless technical support of our products.

For more information on Schmooze Com, please visit www.schmoozecom.com.


ScopServ International Inc. is an information technology company that provides global communication solutions and services to small and medium businesses. ScopServ specializes in user interfaces, management systems and appliances for Asterisk IP PBXs, providing cost efficiency, reliability and flexibility to customers across the globe.

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Sipcat is a software IP Telephony system for small and medium sized businesses. With its easy to use web interface and flexible integration with your existing software applications it provides an excellent and affordable alternative for traditional complex PBX systems. Sipcat grows with your company and provides flexible support if needed.

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SIPGear AB is a Swedish telecom company established in 2005 with the mission to develop and offer the most value for money and user friendly IP-PBX the market can offer. Primary customers are small and medium sized businesses.

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SDI develops a Windows-based IP-PBX Sipleo for entreprises between 2 to hundred persons. Sipleo and Sipleo suite are compatible with Microsoft® TSE, CITRIX®, VMware® . Sipleo is ready for the Cloud.

  • Easy management: its web-based interface: adding extensions, loading Music-On-Hold is as easy as 1,2,3
  • Powerful & scalable: SipleoBox can manage up-to 400 extensions with 60 simultaneous calls. This limit can be easily overpass with IT servers
  • Rich: All telephony features are included
  • Safe investment: year by year Sipleo has more and more features to fit with the new market requirements


SIP Telefonanlagen

VoiP-Telefonanschlüsse und virtuelle Telefonanlagen von sip-telefonanlagen.de Einfacher geht’s nicht!

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Move your company into the future and save money today: Upgrade to Voice-Over-IP with STARFACE PBX. This innovative software solution, developed especially for medium-sized companies, allows you to integrate all subsidiaries, sales offices, and telephones in the field into your centralized STARFACE telephone system. Maximum telephone convenience and effective cost reduction!

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Technology Alignment - VoIPTelCaster IP PBX Systems

Technology Alignment, Inc., headquartered in Nampa, Idaho, is a leading distributor and manufacturer of Linux Operating Systems, PBX Systems, business routers, SIP provisioning, Consumer VoIP and high-end CRM applications.

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Telepo is the leading provider of enterprise mobility and converged communication solutions. The software solution integrates wired and wireless networks, delivering true mobility, improved cost control, feature rich services and a consistent user experience.

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TELES supplies service providers with complete Class 4 and Class 5 NGN softswitch solutions. TELES NGN Solution is a standard based, scalable architecture that minimizes integration time and enables you to go live quickly. 

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telgo.PRO is a virtual PBX system that is hosted in the cloud and fulfils high security standards. Our cloud solutions are future-proof and allow configuration changes and customisation at any time.


VoIP-One entwickelt seit über 10 Jahren Telefon- und Kommunikationslösungen für flexible Arbeitswelten. Zuverlässig und individuell. Für nachhaltige und unabhängige Lösungen setzt VoIP-One auf eine enge Kunden-Zusammenarbeit und auf offene Technologien. 

Weitere Informationen


A few years back a bunch of guys in Sydney were looking for a phone system to install into their expanding office. They were looking for something inexpensive, expandable with features that would come close with bigger business phone systems - but nothing came close to that. That's why they created vtalk, an easy to use phone system with features you would expect from a big phone system all at a great price.

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Zultys delivers the most compelling feature-rich Enterprise-class IP PBX telephone system in its class today, and as it has for the past eight years in a row. Our award-winning platform allows businesses to easily deploy a complete voice and Unified Communications solutions without the complexity or cost of the other brands. 

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Founded in 1989 and set up in Taiwan, ZyXEL is now the leading provider of complete broadband access solutions for service providers, as well as business and home users.

ZyXEL solutions boast the latest, hottest networking features such as Triple Play, Quality of Service (QoS), Network Security and Network Management. Both corporate and home users can take advantage of ZyXEL products and services to enjoy high quality, versatile media applications in a secure and manageable networking environment. 

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