CallTower Status

All Systems Operational

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Welcome to CallTower's home for real-time system status updates. Here you will find a current and historical data on system performance.

Cisco Unified Communications Operational
Cisco Voice Operational
Cisco Jabber Operational
VoiceCube Operational
Attendant Console Operational
Cisco Webex Calling Operational
CT Text Operational
CT Cloud Operational
CT Cloud SIP Operational
CT Cloud Voice Operational
Attendant Console Operational
CT Cloud Meeting Operational
Microsoft Operational
Microsoft 365 Operational
Microsoft Teams - Direct Routing Operational
Microsoft Operator Connect Operational
CT Text Operational
Contact Center Operational
Clarity Connect Operational
Five9 Operational
Intermedia Operational
Cisco Webex Contact Center Operational
Solgari Operational
Global SIP Trunk Operational
Hosted Cloud Based PBX Operational
Zoom Operational
CallTower Connect Operational
Fax Operational
CT Cloud Fax Operational
Concord E-Fax Operational
Concord ATA Fax Operational
eComFax Operational
Skype for Business Operational
Skype for Business - Voice Operational
Instant Messenger and Presence Operational
Attendant Console Operational
WFM (Alvaria) Operational
Talk Desk Operational
Genesys Cloud Operational
Genesys Cloud (US East) Operational
Genesys Cloud (US West) Operational
Genesys Cloud (Canada) Operational
Genesys Cloud (FedRAMP) Operational
Operational
Degraded Performance
Partial Outage
Major Outage
Maintenance

Scheduled Maintenance

Scheduled Maintenance Feb 20, 2026 21:00 - Feb 21, 2026 03:00 MST

ATL Data Center Core Switch Maintenance

Purpose: replace the main core switch in the ATl Data Center

Systems Affected:
Cisco Jabber
Cisco Voice

Impact: Cisco Jabber: Jabber clients may experience intermittent connectivity or login issues as servers are shutdown and failover to redundant data centers occurs.
Cisco phone registration: Cisco phones may temporarily unregister as they reregister with servers in redundant data centers.

Outage: No


MasterFax & CT Cloud Fax - General Server Maintenance

Purpose: Monthly server maintenance: remove old/stuck faxes, reboot servers
updating Wireshark

Systems Affected:
MasterFax
CT Cloud Fax

Impact: Customers will experience interruptions to both MasterFax and CT Cloud Fax services during the Maintenance Window

Outage: Yes

Update Jabber certificate for collaborate-atl.ct450.com

Purpose: Calltower will be upgrading the Edge servers for Jabber.

Systems Affected:
Cisco Jabber

Impact: Users will experience a connectivity loss with their Jabber Client/Services.

Outage: Yes
Posted on Feb 13, 2026 - 10:22 MST

Scheduled Maintenance Feb 22, 2026 20:00 - Feb 23, 2026 02:00 MST

CT Cloud Maintenance - February 2026

Purpose: Upgrade CHI/DAL Meta from 9.6.70 to 9.7.20

Systems Affected:
CT Cloud SIP
CT Cloud Voice

Impact: New calls may fail to setup while services are failed over during maintenance. Calls in progress will not be affected. Downtime will be 30 seconds or less.

Outage: Yes

NOAM Meta 9.7 upgrade

Purpose: Upgrade CHI/DAL Meta to 9.7.20 SU13 for security and stability improvements.

Systems Affected:
CT Cloud SIP
CT Cloud Voice

Impact: New calls may fail to setup while services are failed over during maintenance. Calls in progress will not be affected. Downtime will be 30 seconds or less.

Outage: Yes
Posted on Feb 13, 2026 - 10:24 MST
Feb 13, 2026

No incidents reported today.

Feb 12, 2026
Out-Of-Cycle Maintenance
Completed - The scheduled maintenance has been completed.
Feb 12, 19:00 MST
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Feb 12, 16:00 MST
Scheduled - CallTower EMEA Layer 2 migration

Purpose: Migrating connections for Five9 endpoints.

Systems Affected:
Five9

Impact: Services will be hard down as we migrate from old to new circuits; during failover testing users may experience intermittent issues.

Outage: Yes
Feb 9, 16:04 MST
Feb 11, 2026
Out-Of-Cycle Maintenance
Completed - The scheduled maintenance has been completed.
Feb 11, 01:00 MST
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Feb 10, 22:00 MST
Scheduled - CallTower US Layer 2 migration

Purpose: Migrating connections for Five9 endpoints.

Systems Affected:
Five9

Impact: Services will be hard down as we migrate from old to new circuits; during failover testing users may experience intermittent issues.

Outage: Yes
Feb 9, 16:03 MST
Feb 10, 2026
Feb 9, 2026

No incidents reported.

Feb 8, 2026

No incidents reported.

Feb 7, 2026

No incidents reported.

Feb 6, 2026

No incidents reported.

Feb 5, 2026

No incidents reported.

Feb 4, 2026
Microsoft Teams Call Queue Failures
Resolved - Microsoft is now reporting that the issue affecting Teams users ability to toggle call queues has been resolved. Microsoft’s final posting is included below.

Issue ID: TM1226887
Affected services: Microsoft Teams
Status: Service restored
Issue type: Advisory
Start time: Feb 4, 2026, 2:30 AM MST
End time: Feb 4, 2026, 9:22 AM MST

User impact
Users may have been unable to toggle call queues on or off in the Microsoft Teams web or desktop client.

More info
As a workaround, users may have been able to use the Microsoft Teams mobile app to toggle call queues as expected.

Additionally, admins may have been unable to make changes to call queues, auto attendants, and holidays within the Microsoft Teams admin center.

Scope of impact
Some users hosted in the North America region attempting to toggle call queues in the Microsoft Teams web or desktop client may have been impacted.

Additionally, admins making changes to call queues, auto attendants, and holidays in the Microsoft Teams admin center may also have been affected.

Root cause
A code change contained within a recent service update was causing requests to be sent to an incorrect URL, resulting in impact.

Next steps
- We're reviewing our update procedures to understand why impact to call queues wasn't caught during the testing phase. This will allow us to drive service improvements by proactively identifying similar issues in the future and improve our update testing processes.

Current status
Feb 4, 2026, 10:08 AM MST
We've reverted the offending service update and confirmed through monitoring service health telemetry that the impact has been remediated.
This is the final update for the event.

* CallTower will be closing this master case and all associated cases.
Feb 4, 10:33 MST
Investigating - Microsoft has reported issues with opting into Teams call queues. Microsoft has released an official service health alert for this issue (TM1226887), which is included below. Calltower has identified a workaround for the issue by toggling off the option "Call agents can opt out of taking calls" in the Teams Admin Center. Microsoft also reports that using the Teams application on mobile is a valid workaround.

Microsoft's Posting (TM1226887)

Issue ID: TM1226887
Affected services: Microsoft Teams
Status: Service degradation
Issue type: Advisory
Start time: Feb 4, 2026, 9:10 AM MST

User impact
Users may be unable to toggle call queues on or off in the Microsoft Teams web or desktop client.

More info
As a workaround, users may be able to use the Microsoft Teams mobile app to toggle call queues as expected.

Scope of impact
Some users hosted in the North America region attempting to toggle call queues in the Microsoft Teams web or desktop client may be impacted.

Root cause
A code change contained within a recent service update is causing request to be sent to an incorrect URL, resulting in impact.


Current status
Feb 4, 2026, 9:11 AM MST
We've identified that a code change contained within a recent service update is causing requests to be sent to an incorrect URL, resulting in impact. We're reverting the offending service update as a potential remediation action, and anticipate this process will complete by our next scheduled communications update.
Next update by:
Wednesday, February 4, 2026 at 11:00 AM MST

*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 support@calltower.com. 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.
Feb 4, 09:27 MST
Feb 3, 2026

No incidents reported.

Feb 2, 2026

No incidents reported.

Feb 1, 2026

No incidents reported.

Jan 31, 2026

No incidents reported.

Jan 30, 2026

No incidents reported.

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