Source note · Echo on VoIP calls
Cisco says a hybrid circuit typically provides more than 6 dB ERL, so the extended echo canceller is configured for a 6 dB worst case by default, and it can be set lower if measurement shows the circuit gives 6 dB or less.
Checked 2026-09-25
Typically a hybrid circuit can provide greater than 6 decibels (dB) echo return loss (ERL), so the extended EC is configured to handle 6 dB in the worst case by default.
- Vendor
- Cisco
- Product
- Cisco IOS
- Subsystem
- echo-return-loss
- Deployment
- on-premises
- Region
- not restricted
- Release range
- current as of 2026-09-25
- Checked
- 2026-09-25
Sources
- Cisco IOS Voice Command Reference - D through I - E — Cisco · tier 2 current vendor documentation · echo-cancel enable > Usage Guidelines; echo-cancel erl worst-case
Cite this note
APA
WarmTransfer. (2026, September 25). Echo on VoIP calls: source note echo-on-calls-ios-erl-worst-case-6db. WarmTransfer. https://warmtransfer.net/knowledge/claims/echo-on-calls-ios-erl-worst-case-6db
BibTeX
@misc{warmtransfer-claim-echo-on-calls-ios-erl-worst-case-6db,
title = {Echo on VoIP calls: source note echo-on-calls-ios-erl-worst-case-6db},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/echo-on-calls-ios-erl-worst-case-6db},
note = {Source note echo-on-calls-ios-erl-worst-case-6db, checked 2026-09-25}
}