The tr command connect the console port with the host port.
The tr command has no parameters.
The tr command is used to connect the PMON2000 console to the host port. The host port is given by the environment variable hostport. The host port can not be the same port as the PMON2000 console port.
When the tr command is started PMON2000 displays the line:
Entering transparent mode, ^K to abort
The characters typed on the keboard will be sent to the host port and characters received from the hostport will be displayed on the console. The abort character, ^K, can be changed by setting the environment variable trabort to the character that should end transparent mode.
The stty command.