Source note · Echo on VoIP calls

When the IP phone user hears echo, Cisco attributes it to hybrids in the PSTN network.

Checked 2026-09-25

The problem exists when IP phone users hear echo caused by hybrids in a PSTN network.
Vendor
Cisco
Product
Cisco IP phones with IOS gateways
Subsystem
echo-sources
Deployment
on-premises
Region
not restricted
Release range
as documented 2008-04-02
Checked
2026-09-25

Sources

Cite this note

APA

WarmTransfer. (2026, September 25). Echo on VoIP calls: source note echo-on-calls-ip-user-hears-pstn-hybrid. WarmTransfer. https://warmtransfer.net/knowledge/claims/echo-on-calls-ip-user-hears-pstn-hybrid

BibTeX

@misc{warmtransfer-claim-echo-on-calls-ip-user-hears-pstn-hybrid,
  title  = {Echo on VoIP calls: source note echo-on-calls-ip-user-hears-pstn-hybrid},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/echo-on-calls-ip-user-hears-pstn-hybrid},
  note   = {Source note echo-on-calls-ip-user-hears-pstn-hybrid, checked 2026-09-25}
}

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