Source note · Troubleshooting audio delay and talk-over on voice calls
RTCP lets an RTP sender estimate round-trip propagation delay from a receiver report as arrival time minus LSR minus DLSR, where DLSR is expressed in units of 1/65536 seconds.
Checked 2026-10-02
- Vendor
- not restricted
- Product
- not restricted
- Subsystem
- RTCP measurement
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 3550
- Checked
- 2026-10-02
Sources
- RFC 3550 RTP: A Transport Protocol for Real-Time Applications — IETF / RFC Editor · tier 1 standards and regulators · Section 6.4.1, LSR and DLSR field definitions
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting audio delay and talk-over on voice calls: source note call-latency-troubleshooting-rfc3550-rtt-from-lsr-dlsr. WarmTransfer. https://warmtransfer.net/knowledge/claims/call-latency-troubleshooting-rfc3550-rtt-from-lsr-dlsr
BibTeX
@misc{warmtransfer-claim-call-latency-troubleshooting-rfc3550-rtt-from-lsr-dlsr,
title = {Troubleshooting audio delay and talk-over on voice calls: source note call-latency-troubleshooting-rfc3550-rtt-from-lsr-dlsr},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/call-latency-troubleshooting-rfc3550-rtt-from-lsr-dlsr},
note = {Source note call-latency-troubleshooting-rfc3550-rtt-from-lsr-dlsr, checked 2026-10-02}
}