Polycom CX5500 Unified Conference Station Administrator’s Guide
1.1.0
Polycom, Inc.
173
Use the table
IEEE 802.1p/Q
to set values. The 802.1p/Q
user_priority
field can be set to a value
from 0 to 7. The
user_priority
can be configured specifically for RTP packets and call control
packets, such as SIP signaling packets, with default settings configurable for all other packets.
IEEE 802.1p/Q
Central Provisioning Server
template
>
parameter
Set the user priority for packets without a per-packet protocol setting
(including 802.1p/Q)
site.cfg
>
qos.ethernet.other.user_priority
Web Configuration Utility
To set the user priority for 802.1p/Q packets, navigate to
Settings > Network > QoS
and expand the
Other
Protocols
menu.
Voice Quality Monitoring (VQMon)
You can configure the phones to generate various quality metrics you can use to monitor sound and
listening quality. These metrics can be sent between the phones in RTCP XR packets, which are
compliant with
RFC 3611
—RTP Control Extended Reports (RTCP XR)
. The packets are sent to a report
collector as specified in draft RFC
draft-ietf_sipping_rtcp-summary-02
. The metrics can also be sent as
SIP PUBLISH messages to a central voice quality report collector.
A license key is required to activate the VQMon feature on all phones. For more information on VQMon,
contact your Certified Polycom Reseller.
You can enable three types of voice quality reports:
●
Alert
Generated when the call quality degrades below a configurable threshold.
●
Periodic
Generated during a call at a configurable period.
●
Session
Generated at the end of a call.
You can generate a wide range of performance metrics, the parameters for which are shown in
Voice
Quality Monitoring (VQM)
. Some are based on current values, such as jitter buffer nominal delay and
round trip delay, while others cover the time period from the beginning of the call until the report is sent,
such as network packet loss. Some metrics are computed using other metrics as input, such as listening
Mean Opinion Score (MOS), conversational MOS, listening R-factor, and conversational R-factor.
Voice Quality Monitoring (VQM)
Central Provisioning Server
template
>
parameter
Specify the warning threshold for alerts
features.cfg
>
voice.qualityMonitoring.collector.alert.*
Enable the generation of quality reports
features.cfg
>
voice.qualityMonitoring.collector.enable.*
Specify the server address and port
features.cfg
>
voice.qualityMonitoring.collector.server.x.*
Enable the generation of RTCP-XR packets
features.cfg
>
voice.qualityMonitoring.rtcpxr.enable
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