How does TNG receive call details from the Siemens 3800 using the IP option for SMDR data:
If you use the IP option, the call details is sent to a TCP port(TCP listen).
TNG only has a TCP connect option. You need to install the Datatex Linker program to receive the data from the PABX(TCP listen) and then make it available to a TCP port (TCP connect) for TNG.
Please see forum post: How do I install the Linker service?
In TNG under 'Communication Configuration' set the 'PABX IP' to the 'IP' of the PC on which 'Linker' is running and the PABX Port to that you configured in the Linker program as 'PROVIDER_PORT'.