CallTower experienced a minor incident on July 28, 2025 affecting Cisco Voice and Cisco Webex Contact Center and 1 more component, lasting 1h 48m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Jul 28, 2025, 05:37 PM UTC
Cisco has advised they are currently experiencing a global event impacting Webex calling, media quality degradation and provisioning. CallTower has opened a master case to investigate this issue as it has been reported by more than one CallTower customer. This issue may or may not directly affect your services and is currently under investigation. If you are affected, please report the issue to [email protected]. CallTower intends to post updates on status.calltower.com approximately every 30 minutes, unless identified otherwise. This issue is being investigated as a top priority.
- investigating Jul 28, 2025, 06:04 PM UTC
We are continuing to investigate this issue.
- investigating Jul 28, 2025, 06:04 PM UTC
Cisco has announced a network event that is impacting provisioning and degrading call quality for Webex Calling and Webex Contact Center. Calltower has engaged Cisco Support and is closely monitoring for any new information related to the event. CallTower has opened a master case to investigate this issue as it has been reported by more than one CallTower customer. This issue may or may not directly affect your services and is currently under investigation. If you are affected, please report the issue to [email protected]. CallTower intends to post updates on status.calltower.com approximately every 30 minutes, unless identified otherwise. This issue is being investigated as a top priority.
- identified Jul 28, 2025, 06:26 PM UTC
Cisco has announced a network event that is impacting provisioning and degrading call quality for Webex Calling and Webex Contact Center. They have also noted that some 911 services may fail and that some Cisco Calling Plan services, and Contact Center Agents may experience failures. Their engineers have been able to identify the issue, but there is no estimated repair time yet. Calltower is engaged with Cisco Support and is closely monitoring for any new information related to the event and will provide updates as they are made available to us. CallTower has opened a master case to investigate this issue as it has been reported by more than one CallTower customer. This issue may or may not directly affect your services and is currently under investigation. If you are affected, please report the issue to [email protected]. CallTower intends to post updates on status.calltower.com approximately every 30 minutes, unless identified otherwise. This issue is being investigated as a top priority.
- identified Jul 28, 2025, 06:58 PM UTC
Cisco Engineers have identified a network event and are working diligently toward a resolution. The event is impacting multiple services including Webex Calling, Webex Contact Center, Emergency 911 services, and some Calling Plan Services. Symptoms could include quality degradation or in some cases, call failures. The event is isolated to the US region. There has not been an estimated repair time provided yet, but any new informaiton received will be provided once it has been made 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 approximately every 60 minutes, unless identified otherwise.
- resolved Jul 28, 2025, 07:25 PM UTC
Cisco Engineering has completed mitigation activities. Services should now be fully operational. Please retest and confirm if there are any persisting issues, and please let us know if further support is needed. CallTower will be closing this master case and all associated cases.