@soha1410 Hi Soha. Happy to help you here. Actually, the problem or better say my problem was ISP's flaw. Some sort of problem with the port. They replaced after about a month following up. Here's...

@Pedram I contact the ISP and they said there is no problem with your line. I tried connecting the modem to main ISP cable, same issue! Do you think I should consider replacing the modem with a new...

Hello My device is TD-W8151N and it's working for 7 years or more. Before getting to the point, a while back my modem adaptor got broken. After about two weeks I replaced it with a 9v 0.8A TP-Link...