Edimax BR-6524n Manual page 31

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NOTE: Some service providers use 'DHCP' (Dynamic Host
Configuration Protocol) to assign IP address to you. In this case, you
can choose 'Cable Modem' as Internet connection type, even you're
using another connection type, like xDSL. Also, some cable modem
3.
uses PPPoE, so you can choose 'PPPoE xDSL' for such cable modem
connection, even you're using a cable modem.