I bought this to replace the box of my ISP. This modem is positioned before a netgear router configured with DDWRT firmware. I wanted just bought a modem and let it do all the work to the router that is already set. This modem does its job as it should. My speed and my table were unchanged following the box-modem pass. I connected the modem to the reception, reparameterized my adsl router IDs with my internet connection and all the internet has been functional on. Only downside: I can not access the modem's configuration page being behind my router.