AudioCodes Mediant 2600 - 38 Reporting Information to External Party; Configuring RTCP XR

Version 6.8 485 Mediant 2600 E-SBC
User's Manual 38. Reporting Information to External Party
38 Reporting Information to External Party
This section describes features for reporting various information to an external party.
38.1 Configuring RTCP XR
RTP Control Protocol Extended Reports (RTCP XR) is a VoIP management control that
defines a set of metrics containing information for assessing VoIP call quality and for
diagnosing problems. RTCP XR (RFC 3611) extends the RTCP reports defined in RFC
3550 by providing additional VoIP metrics (Quality of Experience). RTCP XR information
publishing is implemented in the device according to RFC 6035. This draft defines how a
SIP User Agent (UA) publishes the detailed information to a defined collector. RTCP XR
measures VoIP call quality such as packet loss, delay, signal / noise / echo levels,
estimated R-factor, and mean opinion score (MOS). RTCP XR measures these parameters
using metrics as listed in the table below.
Notes:
• The following standard RADIUS Attributes cannot be customized: 1 through 6, 18
through 20, 22, 23, 27 through 29, 32, 34 through 39, 41, 44, 52, 53, 55, 60
through 85, 88, 90, and 91.
• If the RTCP XR feature is unavailable (not licensed or disabled), the R-factor VoIP
metrics are not provided in CDRs (CDR fields, Local R Factor and Remote R
Factor) generated by the device. Instead, these CDR fields are sent with the value
127, meaning that information is unavailable.
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 sends
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 and according to a user-
defined interval between consecutive reports.
Table 38-1: RTCP XR Published VoIP Metrics
Group Metric Name
General
Start Timestamp
Stop Timestamp
Call-ID
Local Address (IP, Port & SSRC)
Remote Address (IP, Port & SSRC)
Session Description
Payload Type
Payload Description
Sample Rate
Frame Duration
Frame Octets
Frames per Packets
Packet Loss Concealment