Telnet is essentially the "old" SX-2000 maintenance console, or used to be... I think it's just gone as of MiVB 9... The credentials are installer/sx2000 but I don't think you will get what your looking for as it will be in a VT100/ANSI terminal that will line wrap at 72-74 characters. Also note you will need to use escape codes for navigate, like ESC-1 for option 1, ESC-2 for option 2, etc. Note that some maintenance commands work, and others do not, this is literally a "left over" from the old SX2000 system and is not intended to be used for any purpose unless directed by technical support.
Honestly, just do a logsys read smdr all in maintenance commands of ESM, then CTRL-A and paste into notepad++ and you should be good.