Fixed Line Phone Service

This service is responsible for the installation, configuration, operation and maintenance of the fixed line telephone infrastructure and services including call centers (Fire Brigade, Service Desk, IT Helpdesk) and telephone switchboard.


Over time, several fixed telephony technologies have been implemented at CERN and coexist until now:

  • CERNphone: CERN's new softphone solution developed by IT department. Users having already a personal number (analogue or IP Alcatel ) can migrate their number to CERNphone. Newcomers are also welcome to create their personal CERNphone number.

  • Skype for Business (SfB): deployed since 2013, SfB has been replaced by CERNphone and phased out in June 2022. 
  •  IP Alcatel phones: deployed between 2006 and 2014. Purchasing new IP Alcatel devices is no longer possible.

  •  Analogue phones: obsolete fixed phone technology, deployed until 2009. The replacement of the analogue phones is ongoing, they are not installed or maintained anymore.