Help center support eXpress
We've collected answers to popular questions to make eXpress easy and convenient to use. Didn't find the answer to your question? Contact our support team.
Calls & Conferences Security
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Calls & Conferences Security
- Calls & Conferences Traffic Routing
- Calls & Conferences Traffic Encryption
- Restricting Access to Screen Sharing From Outside the CDTN
- Other Call Security Questions
Calls & Conferences Traffic Routing 
- Traffic between corporate users always passes through corporate Media servers.
- Traffic to public users is routed through a public Media servers of the vendor.
For more details about the required network access, see this article.
Calls & Conferences Traffic Encryption
eXpress calls and conferences use mandatory end-to-end encryption for media traffic (VoEx).
However, end-to-end encryption of messages is always turned off in call and conference chat rooms.
SIP call media traffic uses an unencrypted protocol.
Restricting Access to Screen Sharing From Outside the CDTN
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The corporate server administrator can use the contour settings of the Corporate Data Transmission Network (CDTN) to prohibit screen sharing for users outside CDTN — more details.