The Client must get the information, which TCMS it has to use. There are three ways to distribute the information:

1. Manually

In Kommbox you can set the TCMS Adress (IP or Hostname) in
KOMMBOX → Remote Administration → TCMS Settings

Note: If you are using Hostname, please check name resolution 

2. DHCP

In your DHCP Server you can define TAG 210 -> String -> IP-Adress or Hostname

Note: Not all DHCP Server allow custom TAG. Especially DHCP in Router have only limited configuration options.
Note: If you are using Hostname, please check name resolution 

3. DNS (Recommended)

In your DNS Server you can define defaulttcms -> IP-Adress of your TCMS
The thin client will search for defaulttcms at the end of the setup wizard and when name can be reached, it will register there.
Note: If you are using Hostname, please check name resolution