I tried to login using ssh, but without access to the terminal I couldn't upload the authorized_keys file.Thanks for your report. I'll check. There was something like that during my internal betas with this but I do not remember such an obstacle (fatal impossibility to login by telnet). BTW I'd recommend to establish SSH access to the router/satellite. SSH authorization by keys is used. In my quick start readme it is mentioned...
BTW, try also to enter using "root" account, not "admin".
Using "root" as username on telnet login gives me the same message, it doesn't allow me to input the password. The thing is, when I try to login using any other invented username, it asks me the password, but not with "admin" or "root".