The device offers several settings if you want to. Otherwise, it can also be quickly and easily set up using the wizard so that it can also be set up from less tech savvy people.
Furthermore, the Fritz box provides extensive information about the DSL.
Still 2 tips for those who migrate to the IP-based connection of the Telekom: The phone numbers must be saved "Internet" as connection type and the hook at "fixed active" "Connection Settings" to get out after the conversion of the terminal. If you can then dial out, that's half the battle. If the phone does not ring for incoming calls, do not get nervous. The existing analog phone must first be ported from the Telekom as an IP number. This happens either in the evening of the changeover day but can be speeded up if you call at least 5 seconds outgoing. So call your own cell phone and allow the connection for 5 seconds exist. The port is then for the next hour and you can be called back.