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
Skype for Business Operational
Skype for Business - Voice ? Operational
Instant Messenger and Presence Operational
Attendant Console Operational
CT Cloud Operational
CT Cloud SIP ? Operational
CT Cloud Voice ? Operational
Attendant Console Operational
CT Cloud Fax Operational
Contact Center Operational
Clarity Connect Operational
Five9 Operational
Telax Operational
Microsoft O365/Teams Operational
Microsoft Teams - Direct Routing Operational
Conferencing Operational
CT Cloud Meeting Operational
Adobe Connect Operational
iMeet Operational
ON Demand Audio Conferencing Operational
CallTower Connect Operational
Operational
Degraded Performance
Partial Outage
Major Outage
Maintenance
Past Incidents
Nov 20, 2019

No incidents reported today.

Nov 19, 2019

No incidents reported.

Nov 18, 2019
Resolved - CallTower Support is monitoring services for customers on Skype For Business (SfB). Customers who have made the recommended network changes are seeing services normalized.

CallTower Support and Engineering will continue to work with customers individually to resolve any outstanding issues. If you have any outstanding issues, please contact support@calltower.com or 800-347-5444 to continue working on this issue.
Nov 18, 15:03 MST
Update - CallTower Support is working with affected customers to address issues related to Skype For Business (SfB) users experiencing connectivity issues, and in some cases no audio being passed on calls after these changes are made. CallTower Engineering has made call routing changes internally to resolve the majority of calls connecting with no audio. Customers are reporting services have normalized when customers verified their network firewall settings were correct, then clearing their cache and rebooting. CallTower encourages all affected customers to take these steps.

Please see below for steps necessary to take:

https://www.uc.solutions/Skype_for_Business/Skype4B_Set_Up/005Firewall_Settings
• It is recommended to whitelist the domain ct950.com on your network as well as specifying the IP addresses.
• Another more flexible approach would be to simply whitelist the following networks since we can and will add servers over time to multiple locations:
• 205.196.169.0/24
• 205.196.173.0/24
• 205.196.174.0/25
• 67.213.189.0/24
• 63.128.106.128/26
• If a SonicWall or other firewall is utilizing "DPI" Deep Packet Inspection, it is recommended to disable this feature for voice traffic. All Skype traffic is Encrypted Data traffic and this feature isn't necessary, also it will interfere with Skype/Voice services and cause call quality issues.
• If your router is not configured for the new traffic protocols that Skype for Business (Lync) will introduce to your network, you could experience packet loss, dropped calls and jitter. You must make sure that SIP inspection or SIP ALG (Application level gateway) are disabled on your routers and firewalls to prevent this from happening. You may need to contact your ISP to have this done, but make sure this is completed prior to deployment. These features in routers are intended to block SIP traffic and will interfere with Skype for Business (Lync) communications.
• Clear your Skype for Business (Lync) cache: https://www.uc.solutions/Skype_for_Business/Skype_for_Business_Client/Windows_Users/How_to_clear_Skype_for_Business_cache
• Reboot your workstation to refresh DNS settings, after the above changes are confirmed.

If you continue to have issues after these changes have been made please contact support@calltower.com or 800-347-5444.
Nov 18, 13:20 MST
Update - CallTower Support is continuing to address an issue related to Skype For Business (SfB) users experiencing connectivity issues. CallTower Engineering has taken steps to remediate issues internally. Customers are reporting services have normalized when customers verified their network firewall settings were correct and then clearing their cache and rebooting.

Please see below for steps necessary to take:

https://www.uc.solutions/Skype_for_Business/Skype4B_Set_Up/005Firewall_Settings
• It is recommended to whitelist the domain ct950.com on your network as well as specifying the IP addresses.
• Another more flexible approach would be to simply whitelist the following networks since we can and will add servers over time to multiple locations:
• 205.196.169.0/24
• 205.196.173.0/24
• 205.196.174.0/25
• 67.213.189.0/24
• 63.128.106.128/26
• If a SonicWall or other firewall is utilizing "DPI" Deep Packet Inspection, it is recommended to disable this feature for voice traffic. All Skype traffic is Encrypted Data traffic and this feature isn't necessary, also it will interfere with Skype/Voice services and cause call quality issues.
• If your router is not configured for the new traffic protocols that Skype for Business (Lync) will introduce to your network, you could experience packet loss, dropped calls and jitter. You must make sure that SIP inspection or SIP ALG (Application level gateway) are disabled on your routers and firewalls to prevent this from happening. You may need to contact your ISP to have this done, but make sure this is completed prior to deployment. These features in routers are intended to block SIP traffic and will interfere with Skype for Business (Lync) communications.
• Clear your Skype for Business (Lync) cache: https://www.uc.solutions/Skype_for_Business/Skype_for_Business_Client/Windows_Users/How_to_clear_Skype_for_Business_cache
• Reboot your workstation to refresh DNS settings, after the above changes are confirmed.

Once you have taken these steps and if you continue to have issues after these changes have been completed, please contact support@calltower.com or 800-347-5444.
Nov 18, 11:39 MST
Identified - CallTower Support has identified an issue related to Skype For Business (SfB) users experiencing connectivity issues.

CallTower Engineering is taking steps to remediate the issue urgently.

CallTower suggests that all customers please verify your settings are in line with those posted on the following article from our knowledge base: https://www.uc.solutions/Skype_for_Business/Skype4B_Set_Up/005Firewall_Settings
• It is recommended to whitelist the domain ct950.com on your network as well as specifying the IP addresses.
• Another more flexible approach would be to simply whitelist the following networks since we can and will add servers over time to multiple locations:
• 205.196.169.0/24
• 205.196.173.0/24
• 205.196.174.0/25
• 67.213.189.0/24
• 63.128.106.128/26
• If a SonicWall or other firewall is utilizing "DPI" Deep Packet Inspection, it is recommended to disable this feature for voice traffic. All Skype traffic is Encrypted Data traffic and this feature isn't necessary, also it will interfere with Skype/Voice services and cause call quality issues.
• If your router is not configured for the new traffic protocols that Skype for Business (Lync) will introduce to your network, you could experience packet loss, dropped calls and jitter. You must make sure that SIP inspection or SIP ALG (Application level gateway) are disabled on your routers and firewalls to prevent this from happening. You may need to contact your ISP to have this done, but make sure this is completed prior to deployment. These features in routers are intended to block SIP traffic and will interfere with Skype for Business (Lync) communications.

If you are experiencing issues related to the above please contact support@calltower.com or 800-347-5444.
Nov 18, 10:04 MST
Investigating - CallTower Support is investigating an issue related to Skype For Business (SfB) users experiencing connectivity issues.

These issues appear to be related to network settings. Please verify your settings are in line with those posted on the following article from our knowledge base: https://www.uc.solutions/Skype_for_Business/Skype4B_Set_Up/005Firewall_Settings.

If you are experiencing issues related to the above please contact support@calltower.com or 800-347-5444.
Nov 18, 09:05 MST
Completed - The scheduled maintenance has been completed.
Nov 18, 02:00 MST
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Nov 17, 21:00 MST
Scheduled - CT Cloud Voice:
***Possible Impact: CT Cloud SIP and CT Cloud Voice - Services will be intermittently unavailable for customers during the maintenance window.
***Possible Impact: CT Cloud Voice - Customers using Accession Mobile on iOS may experience short interruptions in service during the maintenance window.
***Possible Impact: CT Cloud Voice - Customers can expect that CommPortal, voicemail and CT Cloud Communicator will be unavailable during the maintenance window and customers will be prompted to upgrade their existing Accession/CT Cloud Communicator client software after the maintenance window.
Nov 8, 15:00 MST
Nov 16, 2019
Completed - The scheduled maintenance has been completed.
Nov 16, 04:00 MST
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Nov 15, 22:01 MST
Scheduled - Cisco Unified Communications:
***Possible Impact: Cisco Call Manager/Phones - Customers will experience phone re-registering and reboots during the maintenance window.
***Possible Impact: Cisco Voice - Customers will experience Voicemail and auto attendant service disruptions during the maintenance window.
***Possible Impact: Cisco Jabber - Customers can expect to experience a brief loss in connectivity with their Jabber Client/Services, during the maintenance window.

Fax Platforms:
***Possible Impact: CT Cloud Fax - Customers will experience their Fax services will be unavailable for a time during the maintenance window.
***Possible Impact: MasterFax - Customers will experience their Fax services will be unavailable for a time during the maintenance window.
Nov 8, 14:59 MST
Nov 14, 2019

No incidents reported.

Nov 13, 2019

No incidents reported.

Nov 12, 2019

No incidents reported.

Nov 11, 2019

No incidents reported.

Nov 10, 2019

No incidents reported.

Nov 9, 2019

No incidents reported.

Nov 8, 2019

No incidents reported.

Nov 7, 2019
Resolved - CallTower Support has confirmed with our partner Five9 that the issue appears to be resolved. Users are now reporting services have normalized.

If you continue to have any issues with your service please contact support@calltower.com or 800-347-5444
Nov 7, 16:42 MST
Monitoring - CallTower Support is aware of an issue affecting users of Five9 Server – Five9 Plus Applications. The issue is causing agents to receive a ‘Reconnecting’ error message. Our partner, Five9, has acknowledged the issue and has provided the following status update:

• “11/07/2019 12:46 Software testing was successful, we're currently in the process of moving all customers to the patched version.”

CallTower has escalated cases with the partner, Five9, and will provide updates as information becomes available. The next update will be provided by 4:00 PM MST.

If you are affected by this issue please contact support@calltower.com or 800-347-5444.
Nov 7, 14:18 MST
Nov 6, 2019

No incidents reported.