@--dragon__---__ You could try connecting it via Ethernet cable and then login its web interface to check or change the wireless password.

@Rivers1962 Hi, is the TD-W9970 connected to talktalk(wall ONT) via Ethernet cable or via DSL cable? The default operation mode of TD-W9970 is DSL modem router mode, which needs to connect via DSL...

@MuhammadNaiem Hi, do you mean the DSL light will turn off or blinking when the issue happens? You may try the following troubleshooting 1. Please confirm the DSL connection is stable on another DSL...

@Nav_exe Actually, Archer VR400 doesn't support VoIP function, you could check which TP-Link DSL modem routers support VoIP by using filters on the following website: DSL Modem Routers | TP-Link

@Tobias14 By timer, do you mean the reboot schedule function on MR600 itself? or there is indeed a power cut in the area? Did you or someone there confirm the MR600 is off, or it is on but internet...

@Davidm04 Please refer to this guide to set up parental control: How to configure Parental Controls with TP-Link Wireless Dual Band 4G LTE Router If it still doesn't work, please let us know what you...