When a CTI application controls most devices but not one, the per-device settings (controlled devices list, Allow Control of Device from CTI on phone or line, CTI-supported model) are likelier causes than a CTIManager outage, which would affect every device on that provider.
inferred · Checked 2026-10-02
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- CTI troubleshooting method
- Deployment
- on-premises
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Status
- inferred
- Checked
- 2026-10-02
Sources
- System Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Configure CTI Applications — Cisco Systems · tier 2 current vendor documentation · Configure CTI Applications > CTI Redundancy; Associate Devices with Groups
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting CTI applications that cannot control phones in Unified CM: source note cucm-cti-troubleshooting-inference-per-device-scope. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-cti-troubleshooting-inference-per-device-scope
BibTeX
@misc{warmtransfer-claim-cucm-cti-troubleshooting-inference-per-device-scope,
title = {Troubleshooting CTI applications that cannot control phones in Unified CM: source note cucm-cti-troubleshooting-inference-per-device-scope},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-cti-troubleshooting-inference-per-device-scope},
note = {Source note cucm-cti-troubleshooting-inference-per-device-scope, checked 2026-10-02}
}