AudioControl VERSION 6.2 Rtcp XR Voice Quality Monitoring, 20. T.38 SDP T38MaxBitRate Negotiation

SIP Release Notes 1. What's New in Release 6.2

19.RTCP XR Voice Quality Monitoring:

	Product
MP-11x		MP-124
Mediant 600		Mediant 1000
Mediant 800 MSBG		Mediant 1000 MSBG
Mediant 2000
Mediant 3000/TP-6310		Mediant 3000 HA/TP-6310
Mediant 3000/TP-8410		Mediant 3000 HA/TP-8410
	Management Protocol

Web

INI

SNMP

EMS

CLI

This feature provides support for RTP Control Protocol Extended Reports (RTCP XR) according to RFC 3611. RTCP XR is a VoIP management control that defines a set of metrics containing information for assessing VoIP call quality and diagnosis. RTCP XR measures call quality such as packet loss, delay, signal/noise/echo levels, estimated R-factor, and mean opinion score (MOS). RTCP XR extends the RTCP reports defined in RFC 3550 by providing additional VoIP metrics.

RTCP XR information publishing is implemented in the device according to <draft- johnstonsipping-rtcp-summary-07>. This draft defines how a SIP UA publishes the detailed information to a defined collector. RTCP XR messages containing key call- quality-related metrics are exchanged periodically (user-defined) between the device and the SIP UA. This allows an analyzer to monitor these metrics midstream or a device to retrieve them using SNMP. The device can send RTCP XR reports to an Event State Compositor (ESC) server using SIP PUBLISH messages.

These reports can be sent at the end of each call (configured using RTCPXRReportMode) and according to a user-defined interval (RTCPInterval or DisableRTCPRandomize) between consecutive reports. To enable RTCP XR reporting, the VQMonEnable parameter is used. This feature requires that the device be installed with the relevant Software Upgrade Key.

Additional RTCP XR parameters include VQMonGMin, VQMonBurstHR, VQMonDelayTHR, VQMonEOCRValTHR, RTCPXRESCTransportType, and RTCPXREscIP.

20.T.38 SDP T38MaxBitRate Negotiation:

	Product
MP-11x		MP-124
Mediant 600		Mediant 1000
Mediant 800 MSBG		Mediant 1000 MSBG
Mediant 2000
Mediant 3000/TP-6310		Mediant 3000 HA/TP-6310
Mediant 3000/TP-8410		Mediant 3000 HA/TP-8410
	Management Protocol

Web

INI

SNMP

EMS

CLI

This feature supports the negotiation of the T.38 maximum supported fax data rate provided in SIP’s SDP T38MaxBitRate parameter. The negotiated T38MaxBitRate is the minimum rate supported between the local and remote endpoints. The maximum rate supported by the device is configured using the existing parameter, FaxRelayMaxRate.

Version 6.2 37 December 2010