Asterisk does voice over IP in three protocols, and can interoperate with almost all standards-based telephony equipment using relatively inexpensive hardware. Asterisk provides voicemail services with Directory, call conferencing, Interactive voice Response, Call Queuing. It has support for three-way calling, caller ID services, ADSI, SIP and H.323 (as both client and gateway).

Digium™ is the creator and primary developer of Asterisk™, the industry's first Open Source PBX. Used in combination with Digium's™ PCI telephony interface cards, Asterisk™ offers a strategic, highly cost-effective approach to voice and data transport over TDM, switched, and Ethernet architectures.

Kerio Technologies Inc. is a major provider of Internet security software for small to medium sized networks. The solutions protect local networks and personal computers from Internet threats and offer a secure environment for corporate messaging and communication needs.

Red Hat, the world's leading open source and Linux provider, is headquartered in Raleigh, NC with satellite offices spanning the globe. Red Hat is leading Linux and open source solutions into the mainstream by making high quality, low cost technology accessible. Red Hat provides operating system software along with middleware, applications and management solutions. Red Hat also offers support, training and consulting services to its customers worldwide and through top-tier partnerships. Red Hat's Open Source strategy offers customers a long term plan for building infrastructures that are based on and leverage open source technologies with focus on security and ease of management.

Zabbix offers advanced monitoring, alerting and visualisation features today which are missing in other monitoring systems, even some of the best commercial ones. Use of industry standards makes intergation of Zabbix into existing infrastructure trouble-free. Zabbix high-performance agents work under virtually all operating systems. Collecting of SNMP data is also supported. Thus Zabbix takes care of monitoring and availability of any network device on your network.