Bcm50 Capabilities Aligned With Bcm 4.0; Proactive Voice Quality Monitoring - Nortel BCM50 2.0 System Overview Manual

24 Chapter 2 System Overview

BCM50 capabilities aligned with BCM 4.0

In addition to the new features introduced with BCM50, it incorporates many features that were
introduced with BCM 4.0. These include:
•

"Proactive Voice Quality Monitoring"

• "Ad-Hoc conferencing" on page 25
• "Meridian Customer Defined Network (MCDN) Trunk Anti-Tromboning (TAT) with
integrated applications" on page 25
• "Session Initiated Protocol (SIP) enhancements" on page 25
• "Security enhancements" on page 26
• "Terminal and mobility support" on page 28
Proactive Voice Quality Monitoring
The PVQM capability provides the ability to set call-quality thresholds for IP sets receive an alert
and if these thresholds are violated. This provides the ability to proactively identify voice quality
of experience (QoE) issues on a per-call basis. This, in turn, enables troubleshooting of
voice-quality issues within the network.
PVQM supports calls from an IP set to any other set or trunk. The solution is optimized with Phase
2 IP sets, which support autonotification.
Measured call-quality metrics include:
• packet loss
• inter-arrival jitter
• listening R-value
• RTCP round trip delay
Listener "R" value is a direct measure of the call quality or transmission quality, incorporating the
effects of CODEC type, packet loss, discard, burstiness, delay, and other relevant voice-quality
metrics.
With PVQM, a system-wide summary view of threshold-violation alert occurrences is maintained.
Threshold violations can be sent as alarms and used by the centralized AppManager VoIP
performance-monitoring product from NetIQ to generate a system-wide view of the voice quality
of the network and help diagnose voice-quality issues. The alarms include extensive call-quality
information in accordance with IETF RTCP-XR RFC 3611.
PVQM on BCM50:
• provides the ability to monitor quality and integrity of IP-based voice networking
• ia a a significant differentiator in VoIP convergence network sales with its market-leading,
proactive, per-call focus
• mitigates customer issues over whether the data network or the BCM is at fault when
call-quality issues situations occur
• provides consistency in QoE solution across Nortel enterprise call servers to facilitate
mixed network deployments
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