Mar <var data-var='date'>23</var>, <var data-var='time'>00:00</var> MDT Completed - The scheduled maintenance has been completed.Mar <var data-var='date'>22</var>, <var data-var='time'>20:00</var> MDT In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Mar <var data-var='date'>17</var>, <var data-var='time'>14:27</var> MDT Scheduled - Purpose: Patching and preventative maintenance on multiple systems. Systems Affected: CT Cloud Voice: -ATL Meta - March 2026 maintenance ***Possible Impact: New calls may fail to set up while services are failed over during maintenance. Calls in progress will not be affected. Downtime will be 30 seconds or less.

Scheduled Maintenance

Mar <var data-var='date'>21</var>, <var data-var='time'>04:00</var> MDT Completed - The scheduled maintenance has been completed.Mar <var data-var='date'>20</var>, <var data-var='time'>22:00</var> MDT In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Mar <var data-var='date'>13</var>, <var data-var='time'>11:32</var> MDT Scheduled - Purpose: Patching and preventative maintenance on multiple systems. Systems Affected: Fax: -MasterFax and CT Cloud Fax - General Server Maintenance ***Possible Impact: Customers will experience interruptions to both MasterFax and CT Cloud Fax services during the Maintenance Window Cisco: -Update mra.ct450.com and mra02.ct450.com Latest Release ***Possible Impact: Cisco Edge Phones: CallTower will be loading a Public Certificate to all Edge servers for mra.ct450.com and mra02.ct450.com . Phones are expected to be down for no more than a few minutes and should connect as usual once servers are restarted.

Mar <var data-var='date'> 2</var>, <var data-var='time'>13:15</var> MST Resolved - CallTower Support has received positive confirmation from affected customers, and the CT Cloud Communicator Mobile issue is 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.Mar <var data-var='date'> 2</var>, <var data-var='time'>12:37</var> MST Monitoring - Based on vendor guidance, CallTower Engineering completed a configuration change designed to address the CT Cloud Communicator Mobile issue. CallTower Support will continue to monitor the environment to confirm the issue is fully resolved. 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.Mar <var data-var='date'> 2</var>, <var data-var='time'>11:32</var> MST Update - CallTower Engineering continues to partner with the vendor on log and diagnostic review. The issue has been isolated to an affected system, and investigation is ongoing. 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.Mar <var data-var='date'> 2</var>, <var data-var='time'>10:56</var> MST Update - CallTower Engineering remains engaged with the vendor and is providing logs and diagnostic information as part of the ongoing resolution process. 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.Mar <var data-var='date'> 2</var>, <var data-var='time'>10:25</var> MST Identified - The issues affecting CT Cloud Communicator Mobile have been identified as vendor-related. CallTower engineers are actively working with the vendor to determine and implement a resolution. 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.Mar <var data-var='date'> 2</var>, <var data-var='time'>09:52</var> MST Investigating - CallTower Support is actively investigating multiple reports of inbound and outbound call failures and login issues with CT Cloud Communicator Mobile but has not identified/confirmed there is an issue on our network or with our services. 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.

CT Cloud Communicator Mobile Inbound calls, Outbound calls, and Login Issues

Mar <var data-var='date'> 1</var>, <var data-var='time'>23:00</var> MST Completed - The scheduled maintenance has been completed.Mar <var data-var='date'> 1</var>, <var data-var='time'>21:00</var> MST In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Feb <var data-var='date'>27</var>, <var data-var='time'>10:33</var> MST Scheduled - Purpose: Patching and preventative maintenance on multiple systems. Systems Affected: CT Cloud Voice: -CT Cloud Maintenance - March 2026 ***Possible Impact: New calls may fail to set up while services are failed over during maintenance. Calls in progress will not be affected. Downtime will be 30 seconds or less.

Out-Of-Cycle Maintenance

Feb <var data-var='date'>23</var>, <var data-var='time'>02:00</var> MST Completed - The scheduled maintenance has been completed.Feb <var data-var='date'>22</var>, <var data-var='time'>20:00</var> MST In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Feb <var data-var='date'>13</var>, <var data-var='time'>10:24</var> MST Scheduled - 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

Feb <var data-var='date'>21</var>, <var data-var='time'>03:00</var> MST Completed - The scheduled maintenance has been completed.Feb <var data-var='date'>20</var>, <var data-var='time'>21:00</var> MST In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Feb <var data-var='date'>13</var>, <var data-var='time'>10:22</var> MST Scheduled - 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

Feb <var data-var='date'>20</var>, <var data-var='time'>12:15</var> MST Resolved - Some CallTower customers may have briefly experienced issues with Intermedia Contact Center Voice and login. The issue was identified as an Intermedia service outage and has since been resolved. Update from Intermedia: Intermedia Engineering teams identified the root cause as a Cloudflare service disruption that affected connectivity to certain Intermedia services. The third-party provider has since restored service, and Intermedia has verified that Email, Contact Center, and Voice services are fully operational. If any issues persist, customers are advised to contact Intermedia Support for assistance. 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.

Intermedia Contact Center Issues Logging In, Inbound and Outbound Voice Calling Failures

Feb <var data-var='date'>12</var>, <var data-var='time'>19:00</var> MST Completed - The scheduled maintenance has been completed.Feb <var data-var='date'>12</var>, <var data-var='time'>16:00</var> MST In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Feb <var data-var='date'> 9</var>, <var data-var='time'>16:04</var> 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 <var data-var='date'>11</var>, <var data-var='time'>01:00</var> MST Completed - The scheduled maintenance has been completed.Feb <var data-var='date'>10</var>, <var data-var='time'>22:00</var> MST In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Feb <var data-var='date'> 9</var>, <var data-var='time'>16:03</var> 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 <var data-var='date'> 4</var>, <var data-var='time'>10:33</var> MST 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 <var data-var='date'> 4</var>, <var data-var='time'>09:27</var> 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.

Microsoft Teams Call Queue Failures

Jan <var data-var='date'>29</var>, <var data-var='time'>19:30</var> MST Completed - The scheduled maintenance has been completed.Jan <var data-var='date'>29</var>, <var data-var='time'>19:00</var> MST In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Jan <var data-var='date'>29</var>, <var data-var='time'>15:23</var> MST Scheduled - Purpose: Patching and preventative maintenance. Systems Affected: CT Cloud SIP: -Remove Transcoding from IPAuth Adjacency ***CallTower will be disabling support for transcoding. Customers need to ensure that they support G.711, G.729, and/or RFC 2833.

Jan <var data-var='date'>26</var>, <var data-var='time'>04:00</var> MST Completed - The scheduled maintenance has been completed.Jan <var data-var='date'>25</var>, <var data-var='time'>22:00</var> MST In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Jan <var data-var='date'>16</var>, <var data-var='time'>10:20</var> MST Scheduled - CT Cloud Voice - January 2026 maintenance Purpose: Renew APNS certs for AMS, EAS and Perimeta Systems Affected: CT Cloud Voice Impact: Users with CT Cloud Communicator for iOS will need to log back into the application Outage: Yes CT Cloud Communicator - Mandatory update to v3.21.60 Purpose: This version removes CT Cloud Meeting, which has been decommissioned (and no longer functions) 2. Security updates and bug fixes Systems Affected: CT Cloud Voice Impact: Users with CT Cloud Communicator will be forced to upgrade to v3.21.60. Desktop users will be notified in-app if they are not already using v3.21.60 and forced to upgrade to v3.21.60 before they can continue using the app. ***Mac OS users: If CTCC hangs or freezes after update, follow these steps: 1. Uninstall the app from Applications 2. Open Finder and navigate to Go -> Go to folder -> type "~/Library/ApplicationSupport and press go. Remove anything with "CT Cloud" in the name. 3. Open Finder and navigate to Go -> Go to folder -> type "~/Library/Caches and press go. Remove anything with "CT Cloud" in the name. 4. Install CTCC 3.21.60 from CommPortal Mobile users can check and update their current version in the respective app store on their phone. These users will be prompted and forced to upgrade to v3.21.60 before they can continue using the app. Outage: No

Jan <var data-var='date'>24</var>, <var data-var='time'>04:00</var> MST Completed - The scheduled maintenance has been completed.Jan <var data-var='date'>23</var>, <var data-var='time'>22:00</var> MST In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Jan <var data-var='date'>16</var>, <var data-var='time'>10:17</var> MST Scheduled - Upgrade collaborate.ct450.com to V15.3.2 Purpose: Upgrade of collaborate.ct450.com which is 15.3 to 15.3.2 . According to Cisco there are bug fixes that are addressed Systems Affected: *Cisco Jabber Impact: Calltower will be upgrading the Edge servers for Jabber. Users will experience a connectivity loss with their Jabber Client/Services. Outage: Yes Regen CUPs Server Certs Clusters 00,02 and 10 Purpose: Calltower will be updating certificates for the CIsco CUPS servers for Jabber. Systems Affected: *Cisco Jabber Impact: Jabber Clients will receive a Certificate Warning. Please be aware that this is expected behavior and all users will need to accept this before signing back in. Outage: No HCS Server Certificate Renewal - Reboot Purpose: Server Reboots of the HCS Cisco Unified Communications Manager will occur. Systems Affected: *Cisco Call Manager - HCS Impact: User phones will re-register to the next server in the Server list. Calls in progress 'should' remain up until the call has ended. Phone will most likely re register multiple times during the MW time. This is expected behavior. Outage: No MasterFax & CT Cloud Fax - General Server Maintenance Purpose: Monthly server maintenance: remove old/stuck faxes, reboot servers 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

Jan <var data-var='date'> 2</var>, <var data-var='time'>09:24</var> MST Resolved - This incident has been resolved.Jan <var data-var='date'> 2</var>, <var data-var='time'>09:23</var> MST Investigating - CallTower engineers have identified and resolved an issue impacting customers using CT Cloud Communicator. The problem was caused by a failed update that did not download correctly, resulting in application failures. To restore service, our engineers have reverted the update and will not reapply it until we have confirmed with the vendor that it can be deployed successfully. This will not affect customers who have manually updated to the newest version of the app; they can continue to use it without issue. A detailed summary of the event is provided below. If you continue to experience any issues, please contact CallTower Support for assistance. Start Time: Around 6:30 AM MST End Time: 8:18 AM MST Resolution Action: The update was rolled back to the previous version.

CT Cloud Communicator Failed Update

Dec <var data-var='date'>20</var>, <var data-var='time'>04:00</var> MST Completed - The scheduled maintenance has been completed.Dec <var data-var='date'>19</var>, <var data-var='time'>22:00</var> MST In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Dec <var data-var='date'>12</var>, <var data-var='time'>13:59</var> MST Scheduled - CT Cloud Voice - December 2025 Maintenance Purpose: Mitigate attacks against CommPortal and SIP PS by adding ACL to Meta-ATL-WAF1 and Meta-CHI-WAF1. ON 12/21/2025 Systems Affected: - CT Cloud SIP - CT Cloud Voice Impact: - CT Cloud Voice users will need to log back into CommPortal and/or CT Cloud Communicator. Outage: YES CUCM Reboots - All Clusters Purpose: CUCM Reboots - All Clusters, Cluster 00, 02, 03, 04, 07, 08, 09, 10, 12 and HCS. On 12/19/2025 Systems Affected: - Cisco Call Manager Impact: - Server Reboots of the Cisco Unified Communications Manager will occur. Your phone will re-register to the next server in the Server list. Calls in progress 'should' remain up until the call has ended. Outage: No MasterFax & CT Cloud Fax - General Server Maintenance Purpose: Monthly server maintenance: remove old/stuck faxes, reboot servers. On 12/19/2025 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

Nov <var data-var='date'>13</var>, <var data-var='time'>22:00</var> MST Completed - The scheduled maintenance has been completed.Nov <var data-var='date'>13</var>, <var data-var='time'>18:00</var> MST In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Oct <var data-var='date'>31</var>, <var data-var='time'>15:27</var> MDT Scheduled - Purpose: Patching and preventative maintenance on multiple systems. Systems Affected: CallTower Connect: -Connect Database Migration ***CallTower Connect will be down for the duration of the Maintenance Window. This includes the below services: •	Operator Connect DID routing and un-routing, only changes will be affected, not the actual service. •	Legacy Cisco Services o	Call Forwarding and Corporate Directory from Cisco Phones. o	Message Waiting Indicator. o	Remote Notification. o	911 CallerID Cleanup.

Nov <var data-var='date'> 5</var>, <var data-var='time'>07:28</var> MST Resolved - CallTower is considering this issue resolved. If you experience any persisting issues, please provide the most recent call example and we will troubleshoot accordingly. 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.Nov <var data-var='date'> 4</var>, <var data-var='time'>13:31</var> MST Update - CallTower Engineering has worked with affected vendors to implement a resolution for the Toll-Free inbound call issue. We are currently seeing continued stability and performance and will continue to monitor. If you experience any persisting issues, please provide the most recent call example and we will continue to investigate. 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 soon as any new information is made available.Nov <var data-var='date'> 4</var>, <var data-var='time'>12:34</var> MST Monitoring - CallTower Engineering has worked with affected vendors to implement a resolution for the Toll-Free inbound call issue. We are currently seeing resolution of the issue and are continuing to monitor to ensure continued stability and performance 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 60 minutes, unless identified otherwise.Nov <var data-var='date'> 4</var>, <var data-var='time'>11:43</var> MST Investigating - CallTower Support has received multiple reports of failures affecting Toll-Free inbound calls. Our Engineering team is actively investigating the 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.

Toll-Free Inbound Call Failures.

Nov <var data-var='date'> 2</var>, <var data-var='time'>21:15</var> MST Completed - The scheduled maintenance has been completed.Nov <var data-var='date'> 2</var>, <var data-var='time'>21:00</var> MST In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Oct <var data-var='date'>29</var>, <var data-var='time'>12:05</var> MDT Scheduled - Purpose: Patching and preventative maintenance on multiple systems. Systems Affected: CT Cloud Voice, Microsoft, CT Cloud Fax, Intermedia, and Talk Desk: -Emergency Maintenance ***Active calls will not be impacted. New calls initiated during the maintenance window may fail to connect, with downtime expected to be under 30 seconds.

Oct <var data-var='date'>25</var>, <var data-var='time'>03:00</var> MDT Completed - The scheduled maintenance has been completed.Oct <var data-var='date'>24</var>, <var data-var='time'>23:00</var> MDT In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Oct <var data-var='date'>23</var>, <var data-var='time'>14:40</var> MDT Scheduled - Purpose: Patching and preventative maintenance on multiple systems. Systems Affected: CT Cloud Voice: -Migrate circuit cross-connects in Chicago datacenter ***Possible Impact: A short interruption will occur while the cable is being moved.

Oct <var data-var='date'>20</var>, <var data-var='time'>01:00</var> MDT Completed - The scheduled maintenance has been completed.Oct <var data-var='date'>19</var>, <var data-var='time'>21:00</var> MDT In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Oct <var data-var='date'>10</var>, <var data-var='time'>10:25</var> MDT Scheduled - NOAM CommPortal maintenance October 2025 Purpose: Transfer service back to CHI after network changes during CMR(s) on 9/19/25 and 9/20/25 Systems Affected: - CT Cloud SIP - CT Cloud Voice Impact: - CommPortal will be unavailable while service is transferred. Downtime will be 5 minutes or less. Outage: YES

Oct <var data-var='date'>18</var>, <var data-var='time'>04:00</var> MDT Completed - The scheduled maintenance has been completed.Oct <var data-var='date'>17</var>, <var data-var='time'>22:00</var> MDT In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Oct <var data-var='date'>10</var>, <var data-var='time'>10:29</var> MDT Scheduled - Legacy DNS Server Shutdown Purpose: Shutting down Slimer DNS Systems Affected: - CT Cloud SIP - CT Cloud Voice Customers Impact: - If customer is using 69.54.70.15 or 69.54.75.28 for DNS services, please migrate to another DNS service, such as 8.8.8.8 (Google) or 1.1.1.1 (Cloudflare) Outage: YES Upgrade Expressway to X15.3 Purpose: Calltower will be upgrading the Edge servers for Jabber and MRA/Edge Devices. Systems Affected: *Cisco Jabber / Edge Phones Impact: - Users will experience a connectivity loss with their Jabber Client/Services and/or their MRA?Edge connected device. Outage: NO

Oct <var data-var='date'>12</var>, <var data-var='time'>03:00</var> MDT Completed - The scheduled maintenance has been completed.Oct <var data-var='date'>11</var>, <var data-var='time'>21:00</var> MDT In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Oct <var data-var='date'>10</var>, <var data-var='time'>09:43</var> MDT Scheduled - Purpose: CallTower engineers will be completing some routing and maintenance in Chicago. All routing should continue to function as normal, but may cause brief service interruptions for some services. Systems Affected: - CT Cloud Voice - CT Cloud - Microsoft Teams - Cisco hosted - Cisco Webex Impact: - There is a possibility of very brief interruptions lasting a couple seconds as some failovers are performed.

Out of cycle maintenance in Chicago datacenter Part 2

Oct <var data-var='date'>11</var>, <var data-var='time'>02:00</var> MDT Completed - The scheduled maintenance has been completed.Oct <var data-var='date'>10</var>, <var data-var='time'>21:00</var> MDT In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Oct <var data-var='date'>10</var>, <var data-var='time'>09:41</var> MDT Scheduled - Purpose: CallTower engineers will be performing some routing and maintenance in Chicago. All routing should continue to function as normal, but may cause brief service interruptions for some services. Systems Affected: - CT Cloud Voice - CT Cloud - Microsoft Teams - Cisco hosted - Cisco Webex Impact: - There is a possibility of very brief interruptions lasting a couple seconds as some failovers are performed.

Out of cycle maintenance in Chicago datacenter

Sep <var data-var='date'>26</var>, <var data-var='time'>21:30</var> MDT Completed - The scheduled maintenance has been completed.Sep <var data-var='date'>26</var>, <var data-var='time'>21:00</var> MDT In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Sep <var data-var='date'>26</var>, <var data-var='time'>13:55</var> MDT Scheduled - Purpose: Patching and preventative maintenance on multiple systems. Systems Affected: CT Cloud Voice: -CT Cloud Emergency Maintenance ***Possible Impact: CommPortal and Connect will be unable to make changes to any services while servers are restarted. Downtime will be 10 minutes or less.

Sep <var data-var='date'>20</var>, <var data-var='time'>04:00</var> MDT Completed - The scheduled maintenance has been completed.Sep <var data-var='date'>19</var>, <var data-var='time'>22:00</var> MDT In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Sep <var data-var='date'>12</var>, <var data-var='time'>14:38</var> MDT Scheduled - Chicago datacenter moves Purpose: During 9/19 and 9/20 As part of our Chicago datacenter expansion, we will be moving some core network hardware and servers inside the Chicago datacenter. Efforts will be made to minimize impact, but during the moves customers could see brief interruption in service lasting a few minutes each. Systems Affected: - CT Cloud Voice - CT Cloud - Microsoft Teams - Cisco hosted - Cisco Webex Impact: - During equipment moves there may be brief interruptions in service that could last up to a couple minutes each. This would include services like Outage: Yes Upgrade Expressway to X15.3 Purpose: Security and Bug Fixes Systems Affected: Cisco Jabber / Edge Phones Impact: - Calltower will be upgrading the Edge servers for Jabber and MRA/Edge Devices. Users will experience a connectivity loss with their Jabber Client/Services and/or their MRA Edge connected device. Outage: No FR8 Route Reflector migration Purpose: Migrating the FR8 route reflector from Hyper-V to VMware Systems Affected: Sansay, Cisco Webex, Zoom and Microsoft Teams Impact: - Customers may experience a brief connectivity disruption that may affect services in the Frankfurt datacenter. Outage: Yes Legacy DNS Service Shutting Down (Notice Only) Purpose: Shutting down Slimer DNS in October MW Systems Affected: CT Cloud SIP and CT Cloud Voice Customers Impact: - If customer is using 69.54.70.15 or 69.54.75.28 for DNS services, please migrate to another DNS service, such as 8.8.8.8 (Google) or 1.1.1.1 (Cloudflare) before October 17 Outage: Yes

Is CallTower down?

CallTower status is UP

Lastest published events

Scheduled Maintenance

Scheduled Maintenance

CT Cloud Communicator Mobile Inbound calls, Outbound calls, and Login Issues

CallTower Services, Components and Regions

Recent CallTower events

Scheduled Maintenance

Scheduled Maintenance

CT Cloud Communicator Mobile Inbound calls, Outbound calls, and Login Issues

Out-Of-Cycle Maintenance

Scheduled Maintenance

Scheduled Maintenance

Get your FREE account now,
5 monitors included!

Is CallTower down?

CallTower status is UP

Lastest published events

Scheduled Maintenance

Scheduled Maintenance

CT Cloud Communicator Mobile Inbound calls, Outbound calls, and Login Issues

CallTower Services, Components and Regions

Recent CallTower events

Scheduled Maintenance

Scheduled Maintenance

CT Cloud Communicator Mobile Inbound calls, Outbound calls, and Login Issues

Out-Of-Cycle Maintenance

Scheduled Maintenance

Scheduled Maintenance

Get your FREE account now,5 monitors included!

Get your FREE account now,
5 monitors included!