New firmware can sometimes conflict with older configuration settings remaining in the NVRAM.
Look for the text string labeled or Hardware Version .
To check the current firmware version:
Updates patch security holes that hackers could exploit to access your network.
Warning: Since the official support site may have removed the files, manual searching is required. D-link Dsl-124 Firmware
to maintain download speeds up to 24 Mbps. Regular updates can also fix persistent connectivity issues, such as frequent disconnections reported by users. Security and Network Integrity
Update to at least version 1.03. If no update is possible, retire the DSL-124 and buy a modern router. New firmware can sometimes conflict with older configuration
Look for the text or Hardware Version (common versions include T1, U1, etc.).