Source note · DTMF methods and interoperability failures
For SIP INFO tone generation the Cisco gateway clamps Duration to 100-5000 ms and uses 250 ms if no duration is given.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Cisco IOS XE voice gateway
- Subsystem
- SIP INFO DTMF
- Deployment
- on-premises
- Region
- not restricted
- Release range
- IOS XE 17.6 onwards
- Checked
- 2026-09-24
Sources
- CUBE Configuration Guide - Cisco IOS XE 17.6 Onwards - SIP INFO Method for DTMF Tone Generation — Cisco Systems · tier 2 current vendor documentation · SIP INFO Method for DTMF Tone Generation, duration parameters
Cite this note
APA
WarmTransfer. (2026, September 24). DTMF methods and interoperability failures: source note dtmf-interop-sip-info-duration-limits. WarmTransfer. https://warmtransfer.net/knowledge/claims/dtmf-interop-sip-info-duration-limits
BibTeX
@misc{warmtransfer-claim-dtmf-interop-sip-info-duration-limits,
title = {DTMF methods and interoperability failures: source note dtmf-interop-sip-info-duration-limits},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/dtmf-interop-sip-info-duration-limits},
note = {Source note dtmf-interop-sip-info-duration-limits, checked 2026-09-24}
}