Polycom VSX 3000 Administrator's Manual page 27

2. Configure these settings on the Quality of Service screen:
Setting Description
Type of Service Specifies your service type and lets you choose how to set the
priority of IP packets sent to the system for video, audio, and
far-end camera control:
•
•
Type of Service Specifies the IP Precedence or Diffserv value for Video, Audio,
Value and Far End Camera Control.
Maximum Specifies the Maximum Transmission Unit (MTU) size used in
Transmission IP calls. If the video becomes blocky or network errors occur,
Unit Size packets may be too large; decrease the MTU. If the network is
burdened with unnecessary overhead, packets may be too
small; increase the MTU.
•
Enable PVEC Allows the system to use PVEC (Polycom Video Error
Concealment) if packet loss occurs.
Enable RSVP Allows the system to use Resource Reservation Setup Protocol
(RSVP) to request that routers reserve bandwidth along an IP
connection path. Both the near site and far site must support
RSVP in order for reservation requests to be made to routers
on the connection path.
3. Select and configure these settings on the Bandwidth screen:
Setting Description
Dynamic Specifies whether to let the system automatically find the
Bandwidth optimum line speed for a call.
Maximum Specifies the maximum transmit line speed between 64 kbps and
Transmit 1920 kbps.
Bandwidth
Maximum Specifies the maximum receive line speed between 64 kbps and
Receive 1920 kbps.
Bandwidth
IP Precedence — Represents the priority of IP packets
sent to the system. The value can be between 0 and 5. If
this setting is selected, enter the value in the Type of
Service Value field.
DiffServ — Represents a priority level between 0 and 63. If
this setting is selected, enter the value in the Type of
Service Value field.
Auto — Allows the system to select the MTU size.
Networks
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