Grandstream designs all of our products to be fully interoperable with IPPBXs,
traditional PBXs, softswitches,
platforms and open-source based telephony platforms. These alternative platforms offer our customers an innovative and
VoIP solution when paired with Grandstream products. For detailed news announcements, please visit our news room.



3CX offers a fully featured FREE IP PBX with no time outs that is supported via the 3CX forums. 3CX is a privately held company with a management team backed by years of experience in developing and selling network infrastructure software.


Brekeke Software

Brekeke PBX is a SIP-based, IP-PBX software that creates telephony systems for enterprises and service providers. Brekeke PBX comes in three editions: Single-tenant, Multi-tenant (MT) and Contact Center Suite. Brekeke designed PBX MT Edition to be used as a software platform for hosted telephony service providers with a true multi-tenancy feature. The Brekeke Contact Center Suite (CCS) is the latest product derived from Brekeke PBX that provides call capability as well as many other features that are required for a contact center.


Callbox | L5 Networks

The Callbox is a VoIP PBX software, based on Asterisk developed by L5 Networks, leader in the Brazilian market, which integrates all of the administrative features and rich Callcenter functionalities. With a friendly user interface it is possible to adapt the solution to any environment and need. The Callbox can be integrated with any telephony solution, CRM or similar.


Denwa is a top provider of softswitches, virtual PBXs, and IP-PBXs for NGN. Its softswitch solutions actively run in more than 30 telephony operators across the globe. IP-PBX platforms, tailored to both SMB and SME markets, have positioned Denwa as first-in-class in the telecommunications field.

Digium Asterisk

Digium | Asterisk

Digium®, Inc., the Asterisk company, is the original creator and primary developer of Asterisk, the industry’s first open source telephony platform. Digium provides quality hardware and software products, including AsteriskNOWTM, the complete open source software appliance. Asterisk Business EditionTM, the professional-grade version of Asterisk. The AA50, the Asterisk ApplianceTM hardware-based telephony solution. Also Switchvox, a complete turn-key IP PBX solution, to enterprises and telecommunications providers worldwide.



Elastix® is developed and managed by PaloSanto Solutions an Ecuadorian Based Company. PaloSanto Solutions is a leader in open source innovation and new technology in Latin America. Their experience in the development and implementation of open source technologies makes them the preferred technology provider to more than 1000 companies.



Epygi Technologies designs and manufactures robust IP PBXs, voice over IP gateways and cost-saving conference servers. Epygi Quadro PBX appliances are positioned to serve the SMB and SOHO markets, teleworkers and branch offices of large corporations.



FONAX PRO is A SERVER BASE IPPBX with capacity to manage between 1 to 400 extensions, up to 100 concurrent calls, inter connectable with digital trunks, analog lines or voip sip trunking, it is suitable for anyone who wants to have unified communications, has a full mobile solution, reduce communications cost, manage advance reports , for a reasonable price without licensing.


Through an extended network of partners, HiperPBX provides small and large companies with telecom infrastructure designed to optimize communications and business processes. Their portfolio includes last generation scalable IP-PBX, call-center specific solutions, professional consulting services and qualified technical support. HiperPBX Inc. has operations and offices in Argentina, Mexico, Peru, Uruguay and the US.



Matrix is a leading manufacturer of telecom equipment for the customer premises (CPE). These solutions can be grouped under following categories – Voice Switching, Voice Messaging, GSM Products and VoIP Products. Matrix switching products include IP PBXs for SOHO, SMB ,SME and large enterprises.

NEC Sphere

NEC Sphere

Award-winning NEC Sphericall IP PBX delivers enterprise-class unified communications. Combining robust PBX functionality and advanced unified communications features, Sphericall is a comprehensive solution managed through a simple point-and-click user interface.


The Protel PBX is manufactured by nexMatrix Telecom, a provider of nexMatrix SIP services, Protelity hosted PBX, Protel Dialer, Level 4 and 5 softswitches, ATLANTIS CRM/ERP, and other products to form a total Unified Communications solution. The Protel PBX is expandable from a small SOHO to the SMB and Enterprise using HP Superdome 2 mainframes. The company markets and sells their products through Interconnects and Telecom Value Added Resellers.


PymePBX is an IP-PBX platform for the SMB segment developed by GlobalIP S.A.C. from Peru. GlobalIP develops IP-PBX systems for the SMB and Enterprise in Latin America market and offers solution, products and services related to IP-Telephony within the Asterisk community. GlobalIP IP-PBX solutions are widely deployed in private and government organization in Peru and are entering other neighboring markets in the region.

ScopServ International, Inc.

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. Headquartered in Montreal, Canada, ScopServ International distributes its products through numerous resellers and distributors in more than 30 countries worldwide.



ShoreTel is a leading provider of brilliantly simple IP phone systems and unified communications solutions. Its award-winning on-premises IP-PBX solution and cloud-based hosted phone system eliminate complexity and improve productivity. Recognized for its industry-leading customer experience and support, ShoreTel’s innovative business phones, application integration, collaboration tools, mobility, and contact center applications enable users to communicate and collaborate no matter the time, place or device, with minimal demand on IT resources.



Siemens Enterprise Communications is a premier provider of end-to-end enterprise communications, including voice, network infrastructure and security solutions that use open, standards-based architectures to unify communications and business applications for a seamless collaboration experience.


The SNEP is a software based in Asterisk and GNU/Linux, GPL (1) license, which has excellent performance in varied sizes of hardware. It has features that give management flexibility, agility and productivity in voice communications business. Can be customized according to the needs of each business and integrates with other systems. The SNEP interface was designed obeying concepts of ergonomics and practicality, having as main characteristics: clarity, simplicity and objectivity.


Sonetel provides a free, global phone system to small and medium size companies worldwide from operation centers in Europe, USA and Asia. Servicing over 20,000 customers in 200 countries, Sonetel is privately held, with headquarters in Stockholm, Sweden. The CEO Henrik Thomé is a serial entrepreneur with more than 20 years experience from the Telecom/Internet business.



TalkSwitch is a division of Centrepoint Technologies, Inc. Formed in 1990, TalkSwitch sells desktop phone systems and switchboard equipment mainly to small and midsize companies. Most of its devices are interoperable wherein they integrate traditional phone networks with VoIP systems. TalkSwitch offers a range of IP-PBX systems, IP Gateways and IP phones. Some of its early products are the Concero Switchboard and the TalkSwitch line of systems.



trixbox®, formerly Asterisk@Home, which started as a home-grown Asterisk® project, has rapidly become one of most active open source projects in the world. In 2006, trixbox attracted the attention of Fonality, a Los Angeles-based IP-PBX company. The synergies between the companies quickly became clear and Fonality acquired trixbox in October 2006. Fonality now offers Fonality trixbox Pro, a hybrid-hosted software-based solution for resellers; and trixbox CE, an open-source IP-PBX project.