You can access TV over ftp on 21 port.
No telnet, but netcat shell. Its almost same, but hasn`t prompt (like ~#). After you connect to 1023 port you dont have any "welcome" sign. Just empty row. Try to enter some unix command there (like ps -A ) and you will be informed about process list on TV

To have telnet-like netcat connection you have to use special netcat for windows or better - connect from unix mashine (NAS, router console), here must be unix network negotiation. You cant connect to TV directly using terminal or putty if you`re windows user.