Topfield TF 7700 HD PVR User Manual page 86

78 Accessing to The Digital Receiver via The Internet
1. Make an account on a web site providing DDNS service,
which should be supported by your router.
2. Configure your router with the account so that it can
communicate with the web site.
Whenever a new dynamic IP address is assigned to the router,
it will inform the DDNS service provider of the new IP address.
This makes it possible that you access the router with a domain
name at any time.