This attribute specifies the line signal originating from the HSSI
interface that will always be turned on, provided the HSSI interface
passes it diagnostics. This set of signal is generally required for
maintaining the connection. Note that both dte and dce signals are
specified in this attribute. The appropriate set of specified signals
will be turned on or checked according to the operational attribute
actualLinkMode. See also linkMode.
Description of bits:
ca(0)
ta(1)