Polycom RealPresence 2000, Руководство администратора

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Chapter 23-Ultra Secure Mode
Polycom, Inc.
23-37
Restoring the RealPresence® Collaboration Server
(RMX®) 1500/2000/4000 Using the USB Port
When the RMX is in Ultra Secure Mode , the Restoring the RealPresence® Collaboration Server
Using the USB Port procedure can be used to set the RMX back to its factory default settings,
if for any combination of factors the system becomes unstable or unmanageable.
For a full description of this procedure see the
Polycom® RealPresence® Collaboration Server
(RMX®) 1500/2000/4000 Deployment Guide for Maximum Security Environments , " Restoring the
RealPresence® Collaboration Server (RMX®) 1500/2000/4000 Using the USB Port” on page 4-1 .
MLPP (Multi Level Precedence and Preemption)
In compliance with UC APL requirements, Quality of Service ( QoS ) can be more accurately
modified to suit local needs with the addition of Multi Level Precedence and Preemption
methods for call prioritizing and call handling.
QoS is important when transmitting high bandwidth audio and video information. QoS can
be measured and guaranteed in terms of:
•
Latency
• Low packet throughput
• Average delay between packets
• Jitter (variation in delay)
• Transmission error rate
• Order of packet delivery
Precedence is the method by which a call is assigned a priority level. The RMX supports two
separately defined and configurable Domains , each having its own Precedence policy.
For a full description of Precedence see IETF RFC 2474.
One of the following Precedence Levels is assigned to all calls:
Conferences can have a mix of participants from different Precedence domains and network
domains.
Precedence is supported for both IPv4 and IPv6.
Table 23-8 Precedence Levels
Highest Priority FLASH-OVERRIDE-OVERRIDE (Classified Networks only)
FLASH-OVERRIDE
FLASH
IMMEDIATE
PRIORITY
Lowest Priority ROUTINE