How to raise the system on the router if the interface is not available?

Question

linux

In general, there is a telecom Huawei and a Wi-Fi router (netis wf2780). Everything works except the interface. Reset doesn't help. Or rather ... it happens (login and pass are standard), but there is no way to access the router itself. I only knew how to flash the option through the interface, until I found nothing else. Can someone tell me how to connect to it at least possible? Well, like a body, you pump it out through a fastboot. Here, of course, it’s different, but I haven’t come across this yet either: D
Oh, yes ... I forgot - not only indicators work, but there is also the Internet, both through wires and through antennas. Only here is how it turns out that he jumps onto the outlet, but does not want to climb into the face.

Answer 1

If you disassemble it there is a special jack for firmware.

Answer 2

Programmer.