For UCCX agent phones or user device profiles, the Common Device Configuration should be set to IPv4 only.
Checked 2026-10-02
- Vendor
- Cisco
- Product
- Unified Contact Center Express
- Subsystem
- Agent login
- Deployment
- on-premises
- Region
- not restricted
- Release range
- not stated; current as of 2026-10-02
- Checked
- 2026-10-02
Sources
- Troubleshoot Agent Log in Issues — Cisco Systems (TAC technote) · tier 2 current vendor documentation · Troubleshoot Agent Log in Issues > Step 4
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting CTI applications that cannot control phones in Unified CM: source note cucm-cti-troubleshooting-uccx-cdc-ipv4-only. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-cti-troubleshooting-uccx-cdc-ipv4-only
BibTeX
@misc{warmtransfer-claim-cucm-cti-troubleshooting-uccx-cdc-ipv4-only,
title = {Troubleshooting CTI applications that cannot control phones in Unified CM: source note cucm-cti-troubleshooting-uccx-cdc-ipv4-only},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-cti-troubleshooting-uccx-cdc-ipv4-only},
note = {Source note cucm-cti-troubleshooting-uccx-cdc-ipv4-only, checked 2026-10-02}
}