PC700 and CT Series Clocks Update Guide – TLS 1.0/1.1 Deprecation

Affected Time Clocks:

PC700

CT70

CT72

CT74

Overview

In alignment with Microsoft Azure’s announcement regarding the deprecation of TLS 1.0 and 1.1 support, all Lathem PC700 and CT Series clocks must be updated before August 31, 2025, to maintain connectivity with PayClock Online.

Microsoft will discontinue support for TLS 1.0 and TLS 1.1 on their Application Gateway platform as of August 31, 2025. This change affects all networked devices that rely on these protocols for secure communication. For more information, refer to Microsoft’s official update here:
🔗 Microsoft Azure: Support for TLS 1.0 and TLS 1.1 Ends August 31, 2025

Action Required

All customers using PC700 and CT Series clocks must update their device firmware to ensure continued functionality with PayClock Online after August 31, 2025.

Compatible Firmware Versions

To ensure your clocks remain supported, they must be updated to the following minimum firmware versions:

The firmware version for your clock can be checked by logging into the Settings/Admin menu on your clock and tapping on the Device Info Button. 

How to Update Your Clock

How to update the PC700 Frimware

How to update the CT70/CT72 time clock

How to update the CT74 time clock

FAQs

Q: What happens if I don’t update the firmware?

After August 31, 2025, clocks running outdated firmware using TLS 1.0/1.1 will no longer be able to connect to PayClock Online.

Q: Can I still use the clock offline?

Some local features may remain accessible, but full functionality including cloud sync and real-time data uploads will be lost without the update.

Q: How long does the update take?

Firmware updates typically take 5–10 minutes. During the update, the clock will reboot.