System information

Deployment Guide for Siemens Enterprise Communications OpenScape Environments
16
VPN-Based Interdomain Video
Remote or mobile workers in the public domain can use a virtual private network (VPN) to connect to a
private domain and participate in a conference. The benefit of using a VPN to connect is that you can
use public services and applications just as you do in the in the private domain. The following figure
shows a VPN-based interdomain video solution.
Figure 4-2: Connecting with VPN
Gateway-Based Interdomain Video
Gateway-based video enables you to connect video-capable endpoints across networks, when endpoints
are registered with different SIP registrars. You can use gateway-based interdomain video in the
following scenarios:
• To establish a video conference between two endpoints registered with different SIP registrars,
for example, a video partner call between an OpenScape product and a Polycom employee.
• To establish a video conference between multiple endpoints registered at different SIP registrars
and an on-site MCU. For example, you want to establish a video conference call between an
OpenScape product and Polycom product. The conference call is hosted on a Siemens Enterprise
Communications product.
• To establish video between video endpoints registered at different SIP registrars and an off-site
MCU. For example, you want to establish a video conference call between an OpenScape product
and a Polycom product. The conference call is hosted on a Polycom bridge.