The Roaming User function enables users who, for example, work in a large office with workplaces that are not assigned to specific people (i.e. "hot desking") to access any telephone that is configured in the PBX. The user has the known access with his personal settings and authorisations.

If used in combination with the central caller list, the user is given access to all their calls (incoming and outgoing). This requires a COMfortel D-series telephone.