Issue:

With a direct attachment to the Console/Admin port on the server, or within a telnet connection to port 23, the CLI command Telnet does not work.

Cause:

The command line option of Telnet is only available to devices that are logged in on one of the RJ45 serial ports on the server.

Telnet is not available on the Admin port
Telnet is not available within an established telnet connection with the server.

Solution:
Feature currently not supported.