Source note · DTMF methods and interoperability failures
On CUBE, interworking RFC 2833 with G.711 in-band audio DTMF requires DSP transcoding resources and G.711 end to end; Cisco states the other DTMF interworking cases are handled without a transcoder in flow-through calls.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Cisco Unified Border Element
- Subsystem
- media resources
- Deployment
- on-premises
- Region
- not restricted
- Release range
- as of technote update 2023-05-15
- Checked
- 2026-09-24
Sources
- Configure DTMF Relay on CUBE — Cisco Systems · tier 2 current vendor documentation · DTMF interworking section; G711 to RFC2833 requirements
Cite this note
APA
WarmTransfer. (2026, September 24). DTMF methods and interoperability failures: source note dtmf-interop-cube-2833-inband-needs-dsp. WarmTransfer. https://warmtransfer.net/knowledge/claims/dtmf-interop-cube-2833-inband-needs-dsp
BibTeX
@misc{warmtransfer-claim-dtmf-interop-cube-2833-inband-needs-dsp,
title = {DTMF methods and interoperability failures: source note dtmf-interop-cube-2833-inband-needs-dsp},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/dtmf-interop-cube-2833-inband-needs-dsp},
note = {Source note dtmf-interop-cube-2833-inband-needs-dsp, checked 2026-09-24}
}