@IoT-Arista Hi, thanks for letting us know! We moved our documentation library to docs.iotcreators.com - but I think you figured that out. I will try to figure out if we can change or remove the broken links from google search. Thank you!
In case of public APN, we are using a NAT service to allocate public IP addresses dynamically. In case of a private APN, devices get IP addresses from the internal IP addresses space. The IP address assignment is usually managed by Deutsche Telekom. However, the customer has the possibillity to operate his own AAA system (RADIUS forwarding) so that they can manage the IP address assignment by themself.