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The Kommunales Rechenzentrum Niederrhein (KRZN) has phased out its old telephone systems and replaced them with Voice over IP on the basis of an existing wide area network.

Kommunales Rechenzentrum Niederrhein (KRZN): A VoIP network for all local authorities

The Kommunales Rechenzentrum Niederrhein (Lower Rhine Communal Data Center) provides all ICT services for the 10,000 employees of the local authorities in the Lower Rhine region. This includes not only data connections but also communication links. Because the institution could not control the old telephone systems centrally and wanted to reduce telephony costs and introduce new voice services such as unified communications, it enlisted T-Systems to handle the switchover to Voice over IP.

Reduced costs and more services

The Telekom subsidiary used the existing wide area network (WAN) to transmit not only data communications but also telephone calls. The network is based on MPLS (multi-protocol label switching) and is therefore able to transmit data packets on a priority basis. This makes voice telephony more reliable. What is more, the entire network has an availability of 99.99 percent and faults are rectified within a maximum of four hours.
Because only a single connection for voice and data needs to be installed at new workstations, the installation costs when linking together new external offices are reduced for the KRZN. In addition, the previous decentralized telephone systems were replaced by two new redundant Cisco Callmanager systems. This centralization has made it easier to provide support for the entire telephony landscape. And local authorities are able to use new voice services such as computer telephony and unified messaging too.

Details regarding the Kommunales Rechenzentrum Niederrhein reference (KRZN)

  • The Kommunales Rechenzentrum Niederrhein (KRZN) is the central ICT service provider for the 43 local authorities in the Lower Rhine region
  • 10,000 employees
  • Classic voice communication via telephone systems until the end of 2006
  • Since the switchover to VoIP, use of new voice services such as unified messaging
  • Replacing the old telephone systems with central VoIP telephony
  • Using the existing wide area network (WAN)
  • Linking together 10,000 employees and end devices
  • Reducing telephony costs
  • Centrally controlling voice communication
  • Faults rectified within a maximum of four hours
  • VoIP solution on the basis of the existing WAN (wide area network) from T-Systems
  • Redundant, server-based and centrally installed Cisco Callmanager systems
  • Software components for other voice services such as computer telephony integration (CTI) and unified messaging services (UMS)
  • Low investment costs thanks to use of the existing wide area network
  • Central contact person for all issues concerning voice and data services
  • Use of new voice services such as computer telephony integration and unified messaging
  • Greater voice network stability compared to classic telephony with the old telephone system
  • Cabling costs for voice services when linking together new sites and workstations no longer apply
Contact
info.security[at]t-systems.com
T-Systems International GmbH

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