Scheduled Maintenance
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Sep 19, 2026 - 22:00 MDT
Scheduled - Purpose: Patching and preventative maintenance on multiple systems.
Systems Affected:

Cisco:
-Webex - Domestic US Webex Connectivity Optimization
***Possible Impact: Cisco Webex services may experience a brief interruption while improvements are made to strengthen connectivity and increase service resiliency between Cisco and CallTower.
Sep 19, 2026 22:00 - Sep 20, 2026 04:00 MDT

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 Under Maintenance
Cisco Voice Under Maintenance
Cisco Jabber Operational
VoiceCube Operational
Attendant Console Operational
Cisco Webex Calling Under Maintenance
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 Under Maintenance
Clarity Connect Operational
Five9 Operational
Intermedia Operational
Cisco Webex Contact Center Under Maintenance
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

Sep 20, 2026

No incidents reported today.

Sep 19, 2026

Scheduled Maintenance
Completed - The scheduled maintenance has been completed.
Sep 19, 04:00 MDT
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Sep 18, 22:00 MDT
Scheduled - Purpose: Patching and preventative maintenance on multiple systems.
Systems Affected:

Cisco:
-Webex - APAC Webex Connectivity Optimization
***Possible Impact: Cisco Webex services may experience a brief interruption while improvements are made to strengthen connectivity and increase service resiliency between Cisco and CallTower.
-Cisco Jabber / MRA Phones - Security Update Expressway Clusters for CUCM
***Possible Impact: CallTower will be upgrading the Edge servers for Jabber and MRA Edge Phone Device. Users will experience a connectivity loss with their Jabber Client/Services and/or MRA Edge connection Phones.

Voice:
- Hong Kong Masergy Circuit Migration
***Possible Impact: Legacy OneStream voice services hosted in Hong Kong may experience a temporary interruption. Active calls may be disconnected, and new call setup may be unavailable while connectivity services are relocated within the datacenter. Failover and redundant service configurations will minimize downtime. Service will be restored upon completion of the maintenance activities.
- London Infrastructure Maintenance
***Possible Impact: During this maintenance window, services hosted in the Telehouse London datacenter may experience a brief interruption as network infrastructure is upgraded. Any service impact is expected to be limited to the duration of the maintenance activity, and services will be restored immediately upon completion.
Sep 11, 09:31 MDT

Sep 18, 2026

Out-Of-Cycle Maintenance
Completed - The scheduled maintenance has been completed.
Sep 18, 04:00 MDT
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Sep 18, 00:00 MDT
Scheduled - Purpose: Patching and preventative maintenance.
Systems Affected:

Microsoft:
-Microsoft Teams - Migrate MAPS circuits in Ashburn to new cross-connects and test failover afterward
***Possible Impact: There is no expected impact during the circuit migration. During the failover testing, we will intentionally shutdown primary paths to force traffic over the backup connections and test failover performance. This failover testing could result in a very brief loss of audio or dropped calls.
Sep 16, 16:22 MDT

Sep 17, 2026

Teams Direct Routing (GCC High) — DID Assignment and Voice App Provisioning Errors
Resolved - CallTower has continued to monitor the issue following this morning's patch and has confirmed customers are successfully provisioning Direct Routing (DR) users in CallTower Connect for GCC High customers. This issue is now considered resolved.

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.
Sep 17, 13:02 MDT
Monitoring - CallTower deployed a corrective patch early this morning to resolve the issue affecting Direct Routing (DR) user provisioning in CallTower Connect for GCC High tenants. CallTower is currently monitoring the environment to confirm the issue has been fully resolved.

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. This issue is being investigated as a top priority.
Sep 17, 09:12 MDT
Identified - CallTower engineers have identified the root cause of the issue affecting Direct Routing (DR) user provisioning in CallTower Connect for GCC High customers. A corrective patch will be implemented after business hours this evening.
For customers requiring immediate assistance, CallTower Support has a temporary workaround available. Please reach out to support@calltower.com for assistance.

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. This issue is being investigated as a top priority.
Sep 16, 16:58 MDT
Investigating - CallTower is currently investigating an issue affecting the provisioning of Direct Routing users in CallTower Connect for GCC High tenants. Customers may experience errors when assigning DIDs or validating Voice Apps in GCC High environments.

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. This issue is being investigated as a top priority.
Sep 16, 16:13 MDT

Sep 16, 2026

Sep 15, 2026

No incidents reported.

Sep 14, 2026

No incidents reported.

Sep 13, 2026

No incidents reported.

Sep 12, 2026

No incidents reported.

Sep 11, 2026

No incidents reported.

Sep 10, 2026

No incidents reported.

Sep 9, 2026

No incidents reported.

Sep 8, 2026

No incidents reported.

Sep 7, 2026

No incidents reported.

Sep 6, 2026

No incidents reported.

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