Sending a CTRL B with java

I am talking to a device via a Telnet connection (Telnet client from Apache), the device requires us to send a C开发者_StackOverflowtrl+B to go into a certain mode. How can I send that via Java?

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Ctrl+B is just the byte 2.

Given an OutputStream out, out.write(2);.

Function keys and the like will have escape sequences, exactly what sequence is determined by which terminal you have negotiated to emulate.