It's in your Accounts Table, you setup your username and pw there..
Then do a Start - Run - Telnet 127.0.0.1 9000
(assuming it's on the machine your trying to telnet too otherwise replace that IP with the correct addy)
You can go into your database and create a new user for the telnet account too if you like by running a query like this:
Code:
INSERT INTO `account` (`id`, `name`, `charname`, `sharedplat`, `password`, `status`, `lsaccount_id`, `gmspeed`, `revoked`, `karma`, `minilogin_ip`, `rulesflag`, `hideme`, `suspendeduntil`, `time_creation`) VALUES
(NULL, 'TelnetAccount', '', 0, 'yourpasswordhere', 255, 0, 0, 0, 0, '', 0, 1, '0000-00-00 00:00:00', '')
You will want to change the "TelnetAccount" to whatever name you want and of course the Password to whatever password you want to use.