Some DSL-124 variants support TFTP recovery:
The core purpose of the firmware is to manage the ADSL connection. The firmware provides granular control over DSL parameters, allowing users to manually select modulation standards (ADSL2+, ADSL2, G.DMT, T1.413). This is particularly useful in regions with aging copper infrastructure where forcing a specific standard can stabilize a flaky connection. dlink dsl124 firmware work