Webex Contact Center requires RFC 2833 DTMF on the PSTN leg.
Checked 2026-09-22
DTMF: RFC2833
- Vendor
- Cisco
- Product
- Webex Contact Center
- Subsystem
- media
- Deployment
- multi-tenant, hybrid
- Region
- not restricted
- Release range
- current as of 2026-09-22
- Checked
- 2026-09-22
Sources
- Set up voice channels for Webex Contact Center — Cisco Systems, Inc. (Webex Help Center) · tier 2 current vendor documentation · section "PSTN Media and Signaling Requirements for Webex Contact Center", DTMF row
Cite this note
APA
WarmTransfer. (2026, September 22). Telephony during a UCCX to Webex Contact Center migration: source note uccx-to-webex-cc-telephony-coexistence-dtmf-rfc2833. WarmTransfer. https://warmtransfer.net/knowledge/claims/uccx-to-webex-cc-telephony-coexistence-dtmf-rfc2833
BibTeX
@misc{warmtransfer-claim-uccx-to-webex-cc-telephony-coexistence-dtmf-rfc2833,
title = {Telephony during a UCCX to Webex Contact Center migration: source note uccx-to-webex-cc-telephony-coexistence-dtmf-rfc2833},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/uccx-to-webex-cc-telephony-coexistence-dtmf-rfc2833},
note = {Source note uccx-to-webex-cc-telephony-coexistence-dtmf-rfc2833, checked 2026-09-22}
}