System information

Understanding OpenScape Video Use Cases
21
1 The Enterasys Network Management System (NMS) imports data from the physical infrastructure,
such as switches and routers, and from the database.
2 The Enterasys Network Management System (NMS) communicates with the management
appliance to identify the switch the port that is connecting the HDX system or VVX 1500 phone.
3 The management appliance applies the QoS and security settings (also known as policies) for
these ports based on the policy it has received from the Enterasys Network Management System
(NMS).
Using Virtual MCUs in OpenScape Video
Polycom® Distributed Media Application™ (DMA™) 7000 system enables you to configure virtual MCUs,
including multiple physical MCUs that you can access as a single MCU. The benefit of this solution is
better scalability, load balance, and network simplification. The DMA system identifies failure of a
physical MCU or data path and automatically switches to an alternate MCU. As a result, video
conferences are interrupted only briefly.
Connecting Redundant MCUs Using the Polycom DMA System
The Polycom DMA system, shown in the following illustration, enables you to control several MCUs as
one virtual MCU by balancing the load to each connected MCU. This prevents loss of service if a bridge
goes down, and reduces the capacity of only the virtual MCU.
Figure 4-6: The Polycom DMA System
The DMA system supports resilient video conferencing, conference call failover if a connection to a
bridge fails during a call. The DMA system automatically holds the call and reestablishes the connection
to another bridge. Video conference participants notice little break in video and might see a short period
of still video while the system is reconnecting.
Because you can control several MCUs with the DMA system, you can migrate deployment scenarios
from the Polycom RMX system to another manufacturer’s MCU or vice versa.
Refer to the following section for more information on use cases that the DMA system supports.