Direct serial control of each channel transport on the server is available through the RJ45 ports on the breakout cable connected to the server. Ethernet communications can also be used to control a channel transport instead of the direct serial connection.
The first RJ45 port on the breakout cable provides control over channel transport A, the second port provides control over channel transport B, and so on.
The procedure for setting up a room for external control depends on the protocol you want to use.
Please see the links below for these configurations.