If a CUBE call goes from RTP-NTE inbound to an out-of-band method outbound without dtmf-relay rtp-nte digit-drop on the inbound dial-peer, the same digit is sent both out-of-band and in-band, and the far end reads it as a duplicate.
Checked 2026-10-02
Otherwise, the same digit is sent in OOB as well as in-band, and gets interpreted as duplicate digits by the receiving end.
- Vendor
- Cisco
- Product
- Cisco Unified Border Element
- Subsystem
- DTMF relay
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Cisco IOS XE 17.6 onwards
- Checked
- 2026-10-02
Sources
- Cisco Unified Border Element Configuration Guide - Cisco IOS XE 17.6 Onwards - DTMF Relay — Cisco Systems · tier 2 current vendor documentation · chapter 'DTMF Relay', note on digit-drop for RTP-NTE to out-of-band interworking
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting DTMF digits not detected in Webex Contact Center flows: source note wxcc-dtmf-troubleshooting-cube-dup-digits. WarmTransfer. https://warmtransfer.net/knowledge/claims/wxcc-dtmf-troubleshooting-cube-dup-digits
BibTeX
@misc{warmtransfer-claim-wxcc-dtmf-troubleshooting-cube-dup-digits,
title = {Troubleshooting DTMF digits not detected in Webex Contact Center flows: source note wxcc-dtmf-troubleshooting-cube-dup-digits},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/wxcc-dtmf-troubleshooting-cube-dup-digits},
note = {Source note wxcc-dtmf-troubleshooting-cube-dup-digits, checked 2026-10-02}
}