Source note · Echo on VoIP calls
On Cisco IOS voice ports, input gain is applied before the echo canceller sees the echo signal, and output attenuation is applied after the echo canceller sees the original output signal.
Checked 2026-09-25
Input gain is performed before the echo canceler sees the echo signal, and output attenuation is performed after the echo canceler sees the original output signal.
- Vendor
- Cisco
- Product
- Cisco IOS voice gateways
- Subsystem
- echo-canceller-tuning
- 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-gain-vs-attenuation-order. WarmTransfer. https://warmtransfer.net/knowledge/claims/echo-on-calls-gain-vs-attenuation-order
BibTeX
@misc{warmtransfer-claim-echo-on-calls-gain-vs-attenuation-order,
title = {Echo on VoIP calls: source note echo-on-calls-gain-vs-attenuation-order},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/echo-on-calls-gain-vs-attenuation-order},
note = {Source note echo-on-calls-gain-vs-attenuation-order, checked 2026-09-25}
}