D-Link DSL-2750U Rev C1 is a legacy ADSL2+ wireless modem router
Look at the sticker on the underside of the router. It should explicitly state "H/W Ver: C1". d-link dsl-2750u c1 firmware
However, technology moves fast. If you find yourself restarting the router daily, it’s not broken—it’s just telling you it’s ready for retirement. D-Link DSL-2750U Rev C1 is a legacy ADSL2+