It sounds like you might be confusing hyperterminal, which is indeed no longer existent past Windows XP, with Telnet. The telnet client or server is not included by default on Windows Vista (and I assume Windows 2008). Go into your Server Manager, and select Add Features. I think the Telnet Client component will show up in there, if 2008 includes it.
Thanks Trevor's help. We install new telnet client and FTP client features in windows2008 and solve the issue. It seems that MS windows2008 remove a lot of features in new verison. Hopefully, SCCM SP2 can include the feature and don't need customer hand-on fix the problem. BTW, MS windows2008 default open firewall and disable OOB ports and need hand-on open it.