Firmware for the J1 revision can typically be found on regional D-Link support sites, such as D-Link Middle East & Africa or D-Link India . Common versions available for this hardware include: Wireless N ADSL2+ WI-FI Router DSL-2750U - D-Link
Before you download any .bin file from a random forum, look at the sticker under your router. d-link dsl-2750u h w ver j1 firmware
Before discussing the firmware, it is crucial to understand the hardware. The DSL-2750U has two distinct lineages: Firmware for the J1 revision can typically be
The new firmware changed your DSL modulation mode. Fix: Go to Advanced Setup > DSL and try different settings: ADSL2+ , VDSL2 , or Auto Sync . Some J1 units require G.DMT for legacy lines. The DSL-2750U has two distinct lineages: The new
The firmware for the DSL-2750U enables a variety of networking functions: Index of /pub/ADSL/DSL-2750U/Firmware - D-Link FTP