The basis of the VoIP telephone server (PBX) is an OpenSource-based software solution (Asterisk distribution). A redundant system runs on all common server hardware and forms the fail-safe center of office communication. The existing network cabling serves as the structure for signal transmission. Via “Quality of Service” (QoS), data packets from a telephone call are prioritized so that the network is shared with other network participants (PCs, servers, printers) without interference. The advantages here lie in the low acquisition costs, as there are no acquisition costs for the software, lower basic and telephone fees, as well as in an abundance of telephony functions that are possible. There is no function that we cannot implement, from interactive speech dialog systems, to call recordings, call messages via email or a wide variety of call diversions. We take over all work for you as usual. From the construction of new or integration into existing infrastructure, to the installation and adjustment of all devices. Your VoIP telephone system is individually adapted to your needs.