Telnet checks are performed as agent-less monitoring. Zabbix agent is not needed for Telnet checks.
Actual command(s) to be executed must be placed in the Executed script field in the item configuration.
Multiple commands can be executed one after another by placing them on a new line. In this case returned value also will be formated as multi lined.
Supported characters that the shell prompt can end with:
|telnet.run[<unique short description>,<ip>,<port>,<encoding>]||Run a command on a remote device using telnet connection|