of course, any unix system has the capability to run telnet - both
client and server.
However telnet has been deprecated for many years because the security
implications of sending your login and password over the network in the
clear, unencrypted for all to see, are really bad.
All modern unix systems have telnet disabled, and use secure shell for
network logins. Ironically, microsoft windows introduced, for the first
time, a crude telnet server around the time all the unix vendors had
switched to secure shell.
Is there a reason you need telnet, and couldn't use secure shell?