Check if CallTower is down, recent outages, user-reported issues, and outages map.
CallTower is undergoing maintenance
This chart displays the number of user-reported issues over the past 24 hours, grouped into 20-minute intervals. It's normal to see occasional reports, which may be due to individual user issues rather than a broader problem. We only consider an issue widespread if there are multiple reports within a short timeframe. Sign up for free to see more CallTower status data.
IsDown has tracked 126 incidents since started monitoring CallTower status in October 2022. We collect data from 4522+ services, and normalize the data to give you a clear picture of the impact of the outage.
| Date | Status | Incident | Duration |
|---|---|---|---|
|
Sep 04, 2025
05:30 PM EDT
|
Major | Five9 Inbound/Outbound Call Failures | 35 minutes |
|
Aug 15, 2025
02:52 PM EDT
|
Major | CT Cloud Voice EAS Service Down | about 9 hours |
|
Jul 30, 2025
11:33 AM EDT
|
Minor | US Webex Customers experiencing call quality degradation, or call failures | 2 days |
|
Jul 29, 2025
12:09 PM EDT
|
Minor | US Webex Customers experiencing call quality degradation, or call failures | about 2 hours |
|
Jul 28, 2025
01:37 PM EDT
|
Minor | Cisco Webex Calling quality degradation. | about 2 hours |
|
Jul 10, 2025
08:23 AM EDT
|
Major | EMEA intermittent inbound call failure | about 3 hours |
|
May 19, 2025
03:26 PM EDT
|
Major | Outbound Calls Failing for CT Cloud SIP Customers | about 1 hour |
|
May 19, 2025
09:41 AM EDT
|
Major | CT Cloud Communicator Login Issues | 1 day |
|
May 01, 2025
11:48 AM EDT
|
Minor | Intermittent Microsoft Teams Call Queue Failure | about 24 hours |
|
Mar 24, 2025
01:34 PM EDT
|
Major | Microsoft Teams Dropped Calls | 2 days |
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IsDown aggregates scheduled maintenances for CallTower. Currently, there are 2 more maintenances scheduled.
Scheduled for October 18, 2025 at 12:00 AM EDT · until 06:00 AM EDT
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...
Scheduled for October 19, 2025 at 11:00 PM EDT · until 03:00 AM EDT
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 servi...
| Component | Status |
|---|---|
| Cisco Unified Communications | OK |
| Skype for Business | OK |
| CT Cloud | OK |
| Contact Center | MAINTENANCE |
| Microsoft 365 | OK |
| Microsoft Teams - Direct Routing | OK |
| Conferencing | OK |
| CallTower Connect | MAINTENANCE |
Unified communications service offering voice, video, messaging, and fax solutions, integrating platforms like Cisco Jabber, Skype for Business, and proprietary tools like VoiceCube and CT Cloud Voice.
Monitoring CallTower since October 2022
Tracking 26 CallTower services and regions
13 incidents in 2025
Number of Incidents
0 issues
Last incident
39 days ago
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CallTower is down. You can check CallTower status and incident details on the top of the page. IsDown continuously monitors CallTower official status page every few minutes. In the last 24 hours, there were 0 outages reported.
CallTower seems to be having problems. You can check CallTower status and incident details on the top of the page. The status is updated in almost real-time, and you can see the latest outages and issues affecting customers.
No, there is no ongoing official outage. Check on the top of the page if there are any reported problems by other users.
Currently there's no report of CallTower being slow. Check on the top of the page if there are any reported problems by other users.
IsDown monitors the CallTower official status page every few minutes. We also get reports from users like you. If there are enough reports about an outage, we'll show it on the top of the page.
CallTower last outage was on September 04, 2025 with the title "Five9 Inbound/Outbound Call Failures"
Because IsDown is a status page aggregator, which means that we aggregate the status of multiple cloud services. You can monitor CallTower and all the services that impact your business. Get a dashboard with the health of all services and status updates. Set up notifications via Slack, Datadog, PagerDuty, and more, when a service you monitor has issues or when maintenances are scheduled.
IsDown and DownDetector help users determine if CallTower is having problems. The big difference is that IsDown is a status page aggregator. IsDown monitors a service's official status page to give our customers a more reliable source of information instead of just relying on reports from users. The integration allows us to provide more details about CallTower's Outages, like incident title, description, updates, and the parts of the affected service. Additionally, users can create internal status pages and set up notifications for all their third-party services.
IsDown offers an easy way to monitor CallTower with maximum flexibility
IsDown monitors CallTower for major outages. A major outage is when CallTower experiences a critical issue that severely affects one or more services/regions. When CallTower marks an incident as a major outage, IsDown updates its internal status, the customer status page and dashboard. Depending on the customer settings, IsDown will also send notifications.
IsDown monitors CallTower status page for minor outages. A minor outage is when CallTower experiences a small issue affecting a small percentage of its customer's applications. An example is the performance degradation of an application. When a minor outage occurs, IsDown updates its internal status and shares that information on the customer status page. Depending on the customer settings, IsDown will also send notifications.
IsDown collects all information from the outages published in CallTower status page to provide the most accurate information. If available, we gather the title, description, time of the outage, status, and outage updates. Another important piece of information is the affected services/regions which we use to filter the notifications that impact your business.
CallTower publishes scheduled maintenance events on their status page. IsDown collects all the information for each event and creates a feed that people can follow to ensure they are not surprised by unexpected downtime or problems. We also send the feed in our weekly report, alerting the next maintenances that will take place.
IsDown monitors CallTower and all their 26 components that can be affected by an outage. IsDown allows you to filter the notifications and status page alerts based on the components you care about. For example, you can choose which components or regions affect your business and filter out all other outages. This way you avoid alert fatigue in your team.
CallTower and other vendors don't always report outages on time. Our crowdsourced status platform helps you stay ahead of outages. Users report issues and outages, sharing details on what problems they are facing. We use that info to provide early signs of outages. This way, even without an official update, you can stay ahead of possible problems.
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