Log in to your router (usually 192.168.1.1 or 192.168.0.1 ) and look at the top right corner of the status page for the hardware version. Latest Official Firmware Versions
Even with the right firmware, you may encounter problems. d-link dsl-2750u c1 firmware
A correctly updated DSL-2750U C1 can easily last another five years as a reliable ADSL bridge or secondary access point. Stay updated, stay secure. Log in to your router (usually 192
Perform firmware upgrade