A complete IP PBX for today and tomorrow that is easy to use, fully featured and robust

sipXecs Enterprise Communications System (ECS) is a highly robust and scalable, enterprise-grade, and fully featured unified communications solution with integrated voicemail, unified messaging, presence, call center, multiple auto attendants, paging and intercom services and a powerful plug & play web-based configuration and management system. sipXecs is based entirely on the Session Initiation Protocol (SIP) standard and operates on standard Linux operating system. It interoperates with a large number of third party phones, PSTN/IP gateways and applications such as Microsoft Exchange 2007 without compromising ease of use.

The sipXecs IP PBX is an open source alternative to commercial private branch exchange (PBX) systems from vendors such as Avaya, Nortel, Cisco, Siemens, NEC and others. Vis-a-vis Asterisk sipXecs scales to larger installations, offers more unified communications features and is easier to use. The sipXecs IP PBX is a native SIP based solution that offers all the typical features expected from a PBX, including voicemail, unified messaging, auto-attendant, conferencing, presence and call center capabilities. The sipXecs IP PBX can be deployed on a single server for smaller installations or as a distributed and optionally redundant system for larger deployments. It's Web Services (SOA) based management and configuration system allows centralized management of a distributed system and offers plug & play configuration for all phones and gateways.

sipXecs is a 2nd generation voice over IP (VoIP) open source system not built for geeks but enterprise users requiring easy to use, stable and scalable solutions for mission critical applications. Thousands of small and large enterprises rely on sipXecs for their communications needs ranging from 10 people offices with 4 analog trunk lines to companies such as Amazon.com with thousands of users.

sipXecs provides dramatic cost savings while delivering the system and trunk redundancy, interoperability, scalability and plug–and-play benefits that SMB customers expect. sipXecs is a unified communications solution based on a robust real-time architecture that grows with your business.

sipXecs is the first business-grade IP PBX built on standards based open source. It offers proven, robust functionality for thousands of seats on an optionally redundant system, and provides low-cost communications solutions for main and remote offices, home workers, and call centers.

sipXecs interoperates with TDM PBXs via Voice over IP (VoIP) gateways, enabling users to choose a phased-in approach to VoIP implementations. sipXecs relies on standards and utilizes proven Internet techniques and a distributed architecture to create a highly secure and available IP voice system.

Switching to sipXecs has proven to be the right choice for many enterprises already. Open source offers lowest total cost of ownership (TCO) and it does not lock you into a vendor specific and proprietary solution.

The sipXecs IP PBX effort aims at providing a fully capable open source unified communications solution for the mid-enterprise market. The mid-enterprise market ranges from a few hundred users to several ten thousand users, typically located in different buildings, locations or countries. Amazon.com has been an early user of sipXecs worldwide. Currently (2009), Amazon.com uses sipXecs worldwide for over 6,000 employees. sipXecs, of course, can also be used for much smaller deployments. It's easy to setup and use.