US Webex Customers experiencing call quality degradation, or call failures

Update timeline

1. identified Jul 30, 2025, 03:33 PM UTC

   Cisco has announced they are continuing to experience a network event similar to the one they had Yesterday, 730/2025. Cisco Engineering teams are collaborating on potential mitigation actions, including rerouting and optimizing network traffic to resolve the impact. This issue may cause degradation in media quality for some Webex Calling users and Webex Contact Center agents in the US region. Additionally, some provisioning tasks and emergency calls may fail, and certain Cisco Calling Plan services may also experience failures. CallTower has opened a master case for this issue as it is affecting more than one CallTower customer. This issue may or may not directly affect your services. If you are affected, please report the issue to [email protected]. CallTower intends to post updates on status.calltower.com approximately every 60 minutes, unless identified otherwise.

2. monitoring Jul 30, 2025, 06:04 PM UTC

   Cisco's Engineering team has successfully implemented mitigation measures, and all impacted services are now fully operational and stable. CallTower will continue to monitor the situation closely and will share further updates as they become available. CallTower has opened a master case for this issue as it is affecting more than one CallTower customer. This issue may or may not directly affect your services. If you are affected, please report the issue to [email protected]. CallTower intends to post updates on status.calltower.com.

3. resolved Aug 01, 2025, 03:26 PM UTC

   This incident has been resolved.