All Tekron clocks are configured to have DHCP enabled by default.
If the Tekron clock is configured to use DHCP and there is no DHCP server present, the behaviour will differ depending on the clock:
1. For legacy products, the clock will revert back to an IP address of all zeroes. Windows do not accept this type of IP address, so the clock won't be discoverable. We have a tool that helps to overcome this issue here: TCG E-Series DHCP Recovery Tool
2. For current products, the clock will revert back to a link-local IP address (169.254.xxx.xxx).
If you wish to determine whether your clock is using a DHCP assigned IP address or a static IP address, there are two methods that can be used.
Method 1
For clocks with a front panel display that are running supported firmware, the front panel can be used to show whether the IP address is DHCP assigned or static. Note that this method will not work for all Tekron clocks. The table below details the clocks and associated firmware versions that support this method.
| Clock Model | Supported Firmware Versions |
| TCG 01-G | F2.25r2 and later |
| TCG 02-G | F2.25r2 and later |
| NTS 02-G | 3.18r4 and later |
| NTS 03-G+ | 3.18r4 and later |
| NTS 02-E | 3.18r and later |
| NTS 03-E | 3.18r and later |
If the clock is using a static IP address, it will display FIXED: xxx.xxx.xxx.xxx on the front panel display. The "Fixed" indicates that a static IP address has been set.
If the clock is DHCP enabled, then it will display "DHCP: xxx.xxx.xxx.xxx" on the front panel display.
Method 2
This method uses the Configuration Tool and can be used for Tekron clocks that do not have a front panel display or clocks that do not display the IP address settings on the front panel.
1. Download and save a copy of the Tekron Configuration Tool: Tekron Configuration Tool v4.5.1.0
2. Connect the computer directly to the Tekron clock using an Ethernet cable. Tekron legacy products may require an Ethernet crossover cable.
3. Allow the Tekron Configuration Tool through the Windows Firewall. Follow this guide for how to do this: How to create an exception for the Tekron Configuration Software in your firewall
4. Open and run the Tekron Configuration Tool.
5. Press the “Discover” button to discover the clock.
6. Login to the clock and navigate to the Network tab. If the clock is fitted with more than one Ethernet interface, you will need to select and check each Ethernet port settings individually.
The clock will be using a DHCP assigned IP address if the "DHCP" checkbox is enabled, refer to the image below.
The clock will be using a static IP address if the "Static" checkbox is enabled, refer to the image below.
