Softphone is the term used to describe the implementation of a telephone connection at the workstation computer by means of software. Of course, a loudspeaker and a microphone (or headset or USB receiver) are necessary for this.
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If the softphone is to be used behind a firewall, the firewall must be configured accordingly. Here, corresponding rules must also be provided for incoming connections from the TUphone servers. Which ports are to be released depends on the software version used.
Cisco Jabber for Windows and Cisco Jabber for Mac can be downloaded on the SWSupport page (after registration), furthermore, it is also included in the campus software product !TUfree (free products are immediately available after ordering without approval).
Please get the software for Cisco Jabber for iPhone and Android from the respective App Store.