This defines whether signalling link selector(SLS) will
be rotated. This option only applies to ANSI variant
and will return false for all other variants. By default
SLS rotation is enable by default for ANSI linksets. ANSI
specifications state that SLS rotation should not be
performed on C type linksets. This object can be used to
disable SLS rotation.
'true' Indicates that SLS rotation is enable for this
linkset.
'false' Indicates that SLS rotation is disable for this
linkset.