While some configuration for DN radios is via OTA programming, the appropriate APK version must be selected and installed on the radio itself, via the menu. The default is an Entel specific APK version, therefore the Tassta SMART/PTT APK will need to be downloaded and installed as a first step in setting up a new DN radio.
In addition to selecting the correct APK, the PoC credentials must be set for each individual radio. i.e server name/port/username & password.
The following pages describe the processes involved.
https://enteluk.atlassian.net/servicedesk/customer/kb/view/102662430
https://enteluk.atlassian.net/servicedesk/customer/kb/view/102432971