Source note · Echo on VoIP calls
The RTCP XR VoIP Metrics block carries an 8-bit residual echo return loss (RERL) field, measured directly by the endpoint's echo canceller or estimated by adding its reported ERL and ERLE.
Checked 2026-09-25
- Vendor
- IETF
- Product
- RTCP XR
- Subsystem
- echo-measurement
- Deployment
- standard
- Region
- not restricted
- Release range
- RFC 3611
- Checked
- 2026-09-25
Sources
- RTP Control Protocol Extended Reports (RTCP XR) — IETF / RFC Editor · tier 1 standards and regulators · Section 4.7.4 Signal Related Metrics, RERL field
Cite this note
APA
WarmTransfer. (2026, September 25). Echo on VoIP calls: source note echo-on-calls-rfc3611-rerl-definition. WarmTransfer. https://warmtransfer.net/knowledge/claims/echo-on-calls-rfc3611-rerl-definition
BibTeX
@misc{warmtransfer-claim-echo-on-calls-rfc3611-rerl-definition,
title = {Echo on VoIP calls: source note echo-on-calls-rfc3611-rerl-definition},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/echo-on-calls-rfc3611-rerl-definition},
note = {Source note echo-on-calls-rfc3611-rerl-definition, checked 2026-09-25}
}