Hi, just to find out Main.Menu> How to run telnet command on veritas netbackup appliance after going to Main.Menu> Support > Maintenance> Elevate?
Your appliance "model" might be 5240. As for your appliance "version", you will have to check.
As previously highlighted, within later / recent "versions" of appliance, "telnet" has been removed. It's simply not there, so the answer in your case is probaby: "No, you cannot use telnet."
I have to ask... what kind of site are you working at anyway where they would even consider allowing the use of telnet?