A:Answer NO This is a ROUTER, not a MODEM. You require the AT&T modem to convert the signal from AT&T. You can then plug your router (if needed) into the AT&T modem. If the AT&T modem has more than one ethernet port, you do NOT use a router. If it has one ethernet port, YOU DO use a router. If you need more than the 4 or 5 ethernet ports provided by a router or modem/router combination, you use a "switch" to expand the number of ethernet ports available.
