CoWork Calls

The settings of CoWork Calls are set by default so that conferences via voice and video immediately work GDPR-compliant if all participants have a connection to the internet. For the negotiation of the voice and video connection, an STUN server1) is required, which is pre-populated with services located in Germany. The actual voice and video connection then takes place exclusively on secured channels between the participants.

If the negotiation of the connection is also to take place in the local network or via other, private servers, the default setting can be changed.

STUN server

At least one STUN server is required to exchange connection data between the participants of a call. The STUN servers are asked for information on which IP and port the respective client could be reached. The clients then set up their own network among themselves, over which voice and video are transmitted in encrypted form.

Examples of public STUN servers can be found here.

To revert back to the default servers, all servers can be removed and then saved.

Note: No more than 5 servers should be entered, because otherwise the connection setup can be negatively affected.

TURN Server

A TURN Server is being used as a relaying party when no other connection candidates can be found between end clients. That means that, e.g. one client is available by IPv6 only while another is available via IPv4 only. In that case both clients can not directly establish a connection for audio and video calls. A TURN server mitigates this problem by offering separate connections to both end clients and linking them internally.

TURN servers usually require an authentication which can be provided via user name and password.

Note: No more than 5 servers should be entered, because otherwise the connection setup can be negatively affected.

Call Reactions

Call Reactions are a list of emojis that can be sent in a connected calls session. They are intended to give feedback to the speaker or cheer up the conversation. The configuration of the list enables administrative users to make sure which emojis can be sent to a conversation.

Note: the reactions are restricted to the configured ones for the WebAPI as well.

1)
Session Traversal Utilities for NAT