Figure 4: Typical call flow: signaling and media paths
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Unified CM provides call control for both mobile and on-premises endpoints.
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Signaling traverses the Expressway solution between the mobile endpoint and Unified CM.
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Media traverses the Expressway solution and is relayed between endpoints directly; all media is encrypted
between the VCS Control and the mobile endpoint.
Jabber client connectivity without VPN
The mobile and remote access solution supports a hybrid on-premises and cloud-based service model,
providing a consistent experience inside and outside the enterprise. It provides a secure connection for
Jabber application traffic without having to connect to the corporate network over a VPN. It is a device and
operating system agnostic solution for Cisco Unified Client Services Framework clients on Windows, Mac,
iOS and Android platforms.
It allows Jabber clients that are outside the enterprise to:
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use instant messaging and presence services
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make voice and video calls
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search the corporate directory
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share content
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launch a web conference
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access visual voicemail
Note that Jabber Web and Cisco Jabber Video for TelePresence (Jabber Video) are not supported.
Cisco VCS Administrator Guide (X8.1.1)
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Unified Communications
Mobile and remote access