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Version 6.2 37 December 2010
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.