I got Solution,  " Enable TELNET  "  Thanks
When  i  tried telnet  to  6248 version  3.3.14                                PuTTY log 2017.03.30 16:37:56 =~=~=~=~=~=~=~=~=~=~=~=Sorry, new remote sessions are disallowed by current switch configuration. How can I Fix the problem  please advice me  Thank you
Telnet Session