The IT-CS group is responsible for all communication services
in use at the laboratory.This includes networks and communication
for data, voice and video. In order to support the different
services, the group operates a large campus IP/Ethernet network
installation, which reaches out to almost every building on the
CERN sites. The campus network is connected to the Internet,
and it also interconnects with high capacity links to collaborating
The group is also operating the fixed-wire telephone system,
the GSM mobile phone system and the radio system for the emergency
services. In addition, the group operates a few legacy on-site
video and voice distribution systems for dedicated services.
At this time, the group strives to reduce the diversity of
the installation and bring the wired services on to the ubiquitous
The aim is to optimize the availability and capacity of the
communication systems with consideration of costs.