Maintenance work: Certificate update Cisco CallManager

On 15.12.2025 between 6.00 p.m. and 10.00 p.m.

2025/12/12

During the specified period certificates will be renewed on the central components of the Cisco CallManager environment. Short interruptions or reauthentication may occur for Jabber softphones. Cisco phones will restart several times. The Alcatel telephony service will not be affected.