telnet command in .bat file

Hi,

I have problem with starting telnet connection from .bat file.

I have created in SCTM test case by ProcessExecutor.

In ExecutableName field I have "cmd.exe"

In argumnet list I have /c D:\StartTestRun\StartTestRun.bat

In "StartTestRun.bat" I have command "start telnet 127.0.0.1 4477"

The problem is that after test is started I receiving an error (pop-up) with message  "Windows cannot find 'telnet'. Make sure you typed the name correctly, and then try again.

Also in the logs in SCTM this error is visible (11/23/2016 +0100 16:22:46.796 The system cannot find the file telnet.)

When I start this "StartTestRun.bat" by double click everything works fine, telnet starts.

Can anybody tell me where is a problem?

thanks!