CallTower Status

All Systems Operational

About This Site

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

Out-Of-Cycle Maintenance Jul 21, 2026 11:00-12:00 MDT

Purpose: Patching and preventative maintenance on multiple systems.
Systems Affected:

CT Text:
-CT Text Down Vendor Emergency Maintenance
***Possible Impact: The CT Text SMS service will be down due to emergency maintenance by the downstream vendor. This service could potentially be down for 1 hour and return to normal at 12:00 PM MDT.
We apologize for the short notice.
Posted on Jul 20, 2026 - 12:34 MDT
Jul 20, 2026

No incidents reported today.

Jul 19, 2026

No incidents reported.

Jul 18, 2026
Scheduled Maintenance
Completed - The scheduled maintenance has been completed.
Jul 18, 04:00 MDT
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jul 17, 22:00 MDT
Scheduled - PSTN / Global SIP (Sansay Infrastructure):
- Moving Sansay’s from old HK2 Rack to new HK2 Rack.

***Possible Impact: Active calls on the Hong Kong Sansay will be terminated when the maintenance begins. For any customers with functional redundancy from the Hong Kong Sansay to another CallTower datacenter will be able to make and receive new calls via the redundant datacenter during the maintenance window.

Outage: Yes

PSTN / Global SIP (Sansay Infrastructure):
- LAX Border Router Software Updates

***Possible Impact: Sansay customer calls may intermittently drop while updates are being performed and traffic is rerouted.

Outage: No

Cisco:
- Security Update Expressway Clusters for CUCM

***Possible Impact: *Cisco Jabber/ MRA Phones, Users will experience a connectivity loss with their Jabber Client/Services and/or MRA Edge connection Phones.

Outage: Yes

Legacy OneStream Customers:
- car1ff reload/Licensing update.

***Possible Impact: All legacy OneStream voice services will be down for a few minutes while the device is being reloaded.

Outage: Yes
Jul 10, 10:03 MDT
Jul 17, 2026
Jul 16, 2026
Dial by Name Function Failing
Resolved - Microsoft has reported that they have implemented a fix for the issue affecting Dial by Name functionality for Microsoft Teams customers. Following the deployment of the fix, CallTower engineers have completed validation testing across multiple customer tenants and have confirmed that the service is functioning as expected. If you are still experiencing issues, please reach out to support@calltower.com.

CallTower will be closing this master case and all associated cases.
Jul 16, 12:31 MDT
Update - CallTower engineers continue to work with Microsoft to investigate the Dial by Name issue affecting some Teams customers. The issue remains under active review, and escalation efforts are ongoing as both teams analyze available diagnostic information.

We will share additional updates as soon as new information becomes available and thank you for your patience while this investigation continues.

*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 60 minutes, unless identified otherwise. This issue is being investigated as a top priority.
Jul 15, 13:01 MDT
Update - CallTower engineers continue to investigate the issue affecting Dial by Name functionality for a subset of Teams Operator Connect customers. We remain actively engaged with Microsoft and continue to escalate the matter to assist in identifying the underlying cause and restoring normal service as quickly as possible.

*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 60 minutes, unless identified otherwise. This issue is being investigated as a top priority.
Jul 15, 11:43 MDT
Investigating - CallTower is investigating reports of the Dial by Name feature not working for some of our Operator Connect customers. We have opened a case with Microsoft to help investigate this issue.

*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 60 minutes, unless identified otherwise. This issue is being investigated as a top priority.
Jul 15, 10:39 MDT
Jul 15, 2026
Jul 14, 2026

No incidents reported.

Jul 13, 2026
EMEA outbound calls failing
Resolved - CallTower considers the issue resolved at this time. We 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.
Jul 13, 08:51 MDT
Monitoring - CallTower engineers have completed remediation efforts and service appears to be restored, based on current monitoring and testing. We ask that affected customers please retest their services and confirm that normal functionality has been restored. If you continue to experience any issues, please contact CallTower Support and provide details of the impact so that our teams can investigate further. 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 support@calltower.com. CallTower intends to post updates on status.calltower.com as any new information becomes available.
Jul 9, 06:02 MDT
Update - CallTower Network Engineers have identified a potential cause of the service disruption and are actively working to implement remediation measures. At this time, our engineers are focused on validating the identified cause and restoring full-service stability as quickly as possible. We are continuing to monitor the environment closely and are treating this issue as a top priority. 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 support@calltower.com. CallTower intends to post updates on status.calltower.com approximately every 30 minutes, unless identified otherwise
Jul 9, 05:33 MDT
Identified - CallTower engineers are continuing their efforts to isolate and restore services in EMEA for all affected customers. 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 support@calltower.com. CallTower intends to post updates on status.calltower.com approximately every 30 minutes, unless identified otherwise
Jul 9, 05:00 MDT
Update - Microsoft Teams and Zoom customers in EMEA are receiving failures when attempting outbound calls. Calltower's voice network engineers have been engaged and are working diligently to restore services in EMEA. 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.
Jul 9, 04:28 MDT
Investigating - 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.
Jul 9, 03:57 MDT
Jul 12, 2026
Out-Of-Cycle Maintenance
Completed - The scheduled maintenance has been completed.
Jul 12, 23:00 MDT
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jul 12, 22:00 MDT
Scheduled - Purpose: Patching and preventative maintenance on multiple systems.
Systems Affected:

CT Cloud Voice:
- Meta WAFs - Modify WAF Inspection
***Possible Impact: Users may need to log back into CommPortal and/or CT Cloud Communicator
Jul 10, 11:31 MDT
Jul 11, 2026

No incidents reported.

Jul 10, 2026

No incidents reported.

Jul 9, 2026
Jul 8, 2026

No incidents reported.

Jul 7, 2026
Service Update: High-Risk Calling Destination Changes
Completed - The scheduled maintenance has been completed.
Jul 7, 17:10 MDT
Scheduled - As part of our ongoing efforts to protect customers from toll fraud, CallTower is expanding the list of high-risk calling destinations to include select exchanges in Alaska and Montana.

Customers who do not have high-risk calling enabled on their account may be unable to place calls to certain destinations identified as having an elevated fraud risk.

If you are unable to complete calls to a destination and believe there is a legitimate business need, please contact CallTower Support. Our team can help determine whether fraud-prevention controls are affecting call completion and discuss available options.
Jul 7, 15:45 MDT
Jul 6, 2026

No incidents reported.

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