Source note · Echo on VoIP calls
Cisco states that ERL needs to be approximately 6 dB or higher for the gateway echo canceller to engage.
Checked 2026-09-25
ERL needs to be approximately 6 dB or higher for the echo canceler to engage.
- Vendor
- Cisco
- Product
- Cisco IOS voice gateways
- Subsystem
- echo-return-loss
- Deployment
- on-premises
- Region
- not restricted
- Release range
- as documented 2008-04-02
- Checked
- 2026-09-25
Sources
- Troubleshooting Echo Problems between IP Phones and IOS Gateways — Cisco · tier 2 current vendor documentation · Step-by-step Procedure to Troubleshoot and Eliminate Echo
Cite this note
APA
WarmTransfer. (2026, September 25). Echo on VoIP calls: source note echo-on-calls-erl-6db-engage. WarmTransfer. https://warmtransfer.net/knowledge/claims/echo-on-calls-erl-6db-engage
BibTeX
@misc{warmtransfer-claim-echo-on-calls-erl-6db-engage,
title = {Echo on VoIP calls: source note echo-on-calls-erl-6db-engage},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/echo-on-calls-erl-6db-engage},
note = {Source note echo-on-calls-erl-6db-engage, checked 2026-09-25}
}