I've used both pexpect and python's built-in telnetlib somewhat regularly to talk to "dumb" telnet devices. Depending on how complicated the data is, telnetlib might be good enough and will work ...

Telnet is a protocol used for emulating a remote terminal. Telnet tool is an implementation of the Telnet protocol, which translates the protocol specifications into a programming language to create a ...

A port is a gateway on a computer through which a connection is established. To test the network and Internet connection in your business, test the connection port using the Telnet utility in Windows.