System information

Configuring Polycom RMX Systems to Interoperate with Siemens OpenScape
Polycom, Inc. 6–13
— Transmission error rate
DiffServ and Precedence are the two QoS methods that the RMX supports.
These methods differ in the way the packet's priority is encoded in the
packet header. The way RMX implements QoS is defined per Network
Service, not per endpoint.
10 View or modify the following fields:
Note: The routers must support QoS in order for IP packets to get higher priority.
Field Description
Enable Select to enable the configuration and use of the QoS
settings.
When un-checked, the values of the Differentiated Services
Code Point (DSCP) bits in the IP packet headers are zero.
Type DiffServ and Precedence are two methods for encoding
packet priority. The priority set here for audio and video
packets must match the priority set in the router.
DiffServ — Select when the network router uses DiffServ for
priority encoding.
The default priorities for both audio and video packets is
0x88. These values are determined by the QOS_IP_VIDEO
and QOS_IP_AUDIO flags in the system.cfg file.
Precedence — Select when the network router uses
Precedence for priority encoding, or when you are not sure
which method is used by the router. Precedence needs to be
combined with None in the TOS field.
The default priority is 5 for audio and 4 for video packets.
Note: Precedence is the default mode as it is capable of
providing priority services to all types of routers, as well as
being currently the most common mechanism.
Audio / Video You can prioritize audio and video IP packets to ensure that
all participants in the conference hear and see each other
clearly. Select the desired priority. The scale is from 0 to 5,
where 0 is the lowest priority and 5 is the highest. The
recommended priority is 4 for audio and 4 for video to ensure
that the delay for both packet types is the same and that
audio and video packets are synchronized and to ensure lip
sync.