Go to RME > Administration > Config Management and set the Application Name field to NetShow. You can now select your protocols (Telnet and / or SSH) and the protocol order. You want the protocol order to be SSH, Telnet.
You will need to setup the router to support SSH logins if you haven't already done so:
ip domain-name xxx.com
crypto key generate rsa
ip ssh version 2
line vty 0 15
transport input telnet ssh