Cisco Cisco Unified MeetingPlace Audio Server Quick Setup Guide
Administration Center Page References for Cisco Unified MeetingPlace
Media Parameters Page
54
Table 36
Field Reference: Media Parameters Page
Field
Description
Media Parameters
Audio RTP starting port
The Media Server assigns RTP
1
/UDP
2
ports starting from the specified value up to that
value plus 1024. Modify this field only if required to conform with local firewall rules.
This field applies only to audio ports. Video ports always start at 20000 and are not
configurable.
configurable.
Default 16384
TTL
Time-to-live value in the IP header of transmitted voice packets. Determines how many
hops an IP packet can travel through the network before it is discarded.
hops an IP packet can travel through the network before it is discarded.
Recommendation: Set the value at least high enough to match the number of router hops
between Cisco Unified MeetingPlace and the furthest user endpoint. Using a relatively
low number can help reduce the quantity of stray packets on the network.
between Cisco Unified MeetingPlace and the furthest user endpoint. Using a relatively
low number can help reduce the quantity of stray packets on the network.
Default: 64
QoS
3
Audio media IPv4
Video media IPv4
Signaling IPv4
Differentiated Services (DiffServ) code point (DSCP) settings that determine the QoS
for the audio and video media signaling, as defined in RFC 2475.
for the audio and video media signaling, as defined in RFC 2475.
Recommendation: Keep the default value. The other values are available for the rare
instances when the network requires a different DSCP setting.
instances when the network requires a different DSCP setting.
For more information, see the “Network Infrastructure” chapter of the Cisco Unified
Communications Solution Reference Network Design (SRND) that applies to your
version of Cisco Unified Communications Manager at
Communications Solution Reference Network Design (SRND) that applies to your
version of Cisco Unified Communications Manager at
http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_implementation_d
esign_guides_list.html
esign_guides_list.html
.
Defaults:
•
Audio media: EF DSCP (101110)
•
Video media: AF41 DSCP (100010)
•
Signaling: CS3 (precedence 3) DSCP (011000)
Echo Canceller
4
Window size (milliseconds)
Range of echo return delay that the LEC will attempt to cancel.
Default: 128
Enable non-linear processing (NLP) NLP removes the small amount of residual uncanceled echo that inevitably passes
through the echo canceller and may be useful for removing residual echo from acoustic
or low-bandwidth voice codec (for example, ITU-T G.729) endpoints.
or low-bandwidth voice codec (for example, ITU-T G.729) endpoints.
Set this field to No:
•
If you do not want to suppress the residual echo.
•
If you notice subtle voice quality issues, such as variations in background noise
levels while NLP is enabled.
levels while NLP is enabled.
Default: Yes