The 2021 Cisco transition deployment guide states that the PSTN option cannot be changed once it is configured for a tenant.
Checked 2026-09-22
You cannot change the PSTN option once it is configured for a tenant.
- Vendor
- Cisco
- Product
- Webex Contact Center
- Subsystem
- pstn-connectivity
- Deployment
- multi-tenant, hybrid
- Region
- not restricted
- Release range
- guide dated 2021-09
- Checked
- 2026-09-22
Sources
- Contact Center: Transitioning from Unified Contact Center Express to Webex Contact Center Deployment Guide — Cisco Systems, Inc. · tier 2 current vendor documentation · pre-transition step 6, "Understand PSTN options"
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-pstn-fixed-2021. WarmTransfer. https://warmtransfer.net/knowledge/claims/uccx-to-webex-cc-telephony-coexistence-pstn-fixed-2021
BibTeX
@misc{warmtransfer-claim-uccx-to-webex-cc-telephony-coexistence-pstn-fixed-2021,
title = {Telephony during a UCCX to Webex Contact Center migration: source note uccx-to-webex-cc-telephony-coexistence-pstn-fixed-2021},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/uccx-to-webex-cc-telephony-coexistence-pstn-fixed-2021},
note = {Source note uccx-to-webex-cc-telephony-coexistence-pstn-fixed-2021, checked 2026-09-22}
}