View and Configure Parallel Port Settings
Note: To ensure consistency with PostScript language requirements, if the Handshake parameter is set, but the corresponding Back Channel parameter is not set, the printer issues a warning and the Back Channel parameter is forced to the correct value. For example, if Handshake is set to Bidirectional, Back Channel is forced to Parallel. If Handshake is set to Unidirectional, Back Channel is forced to None. If Back Channel is changed without the correct corresponding Handshake setting, the printer reports an error.