Navigate to . Look for "Firmware Version."

While the term "DSL-3788" appears to be a misidentification or a confusion with internal hardware codes, the solution lies in correctly identifying your hardware as the (or occasionally the older DSL-AC series, depending on the physical look of the device).

: Often based on Linux or ZyNOS depending on the specific hardware revision.

: Supports VDSL2 (up to 100 Mbps) and ADSL2/2+ standards.