Related specifications
RFC 3611 , RTP Control Protocol Extended Reports (RTCP XR), available at http://www.ietf.org/
Implementation notes
Supported and unsupported metrics of the VoIP metrics report block (Section 4.7, RFC 3611) are presented in the following table:
|
Metrics of VoIP Metrics Report Block |
Requirement level for compliance by RFC 3611 |
Supported by implementation |
|---|---|---|
|
Packet Loss and Discard Metrics |
||
|
Loss rate |
MUST |
Yes |
|
discard rate |
MUST |
Yes |
|
Burst Metrics |
||
|
burst density |
MUST |
Yes |
|
Gap density |
MUST |
Yes |
|
burst duration |
MUST |
Yes |
|
Gap duration |
MUST |
Yes |
|
Delay Metrics |
||
|
round trip delay |
MUST |
Yes |
|
end system delay |
SHOULD |
No |
|
Signal Related Metrics |
||
|
signal level |
SHOULD |
No |
|
noise level |
SHOULD |
No |
|
residual echo return loss |
SHOULD |
No |
|
Call Quality or Transmission Quality Metrics |
||
|
R factor |
SHOULD |
No |
|
ext. R factor |
SHOULD |
No |
|
MOS-LQ |
SHOULD |
No |
|
MOS-CQ |
SHOULD |
No |
|
Configuration Parameters |
||
|
packet loss concealment |
MUST |
Yes |
|
jitter buffer adaptive |
MUST |
Yes |
|
jitter buffer rate |
MUST |
Yes |
|
Jitter Buffer Parameters |
||
|
jitter buffer nominal delay |
MUST |
Yes |
|
jitter buffer maximum delay |
MUST |
Yes |
|
jitter buffer absolute maximum delay |
MUST |
Yes |