FRITZ!Box 7581 Service - Knowledge Base
Can the FRITZ!Box be used as a DSL modem?
The FRITZ!Box cannot be used as a DSL modem because the majority of the FRITZ!Box functions could not be used then. It would also no longer be possible to use the telephony functions and television service included in Internet packages offered with many DSL lines. Therefore, configure the FRITZ!Box for operation as a DSL router.
If your Internet service provider allows you to establish several parallel Internet connections, you can enable PPPoE Passthrough in the FRITZ!Box. This way all of the computers or routers connected to the FRITZ!Box can establish additional PPPoE Internet connections via the FRITZ!Box using their own account information.