how can i telnet or get access to other LAN members in LAN without using third party software?

[qamarmiqdad]

I have admin access to the main  router in our LAN, so how can i telnet or get access to other LAN  members in LAN without using third party software?

its linksys3500 router and  i login as admin using the gateway address in address bar..

i  want to access the c drive of my colleague in same subnet in same  office and i know his ip address.but he not configured telnet accept  request.so without it how can i open his telnet port and access him

[amohabir1]

I think you are using the wrong terminology. You can browse the hidden share of any pc if you know the ip and have a valid user account on the pc by typing in the following \\computername\c$ or \\ipaddress\c$ . It should prompt you for a user account. You may have to allow this through the windows firewall (or disable it completely).