CallTower incident
US Webex Customers experiencing call quality degradation, or call failures
CallTower experienced a minor incident on July 29, 2025 affecting Cisco Voice and Cisco Webex Contact Center and 1 more component, lasting 1h 7m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Jul 29, 2025, 04:09 PM UTC
Cisco has announced they are continuing to experience a network event similar to the one they had Yesterday, 7/29/2025. The issue may cause media quality degradation for some Webex Calling users and Webex Contact Center agents in the US region. Additionally, some provisioning tasks and emergency calls may fail, and some Cisco Calling Plan services may experience failures as well.
- resolved Jul 29, 2025, 05:16 PM UTC
Cisco's Engineering team has completed mitigation efforts and Cisco reports all services are now fully operational CallTower will be closing this master case and all associated cases. Within three business days, an Official Root Cause Analysis (RCA) or a Preliminary RCA will be available and provided to customers upon request.