Lexical signs can be decomposed in sublexical units, known as phonological parameters. There are five different groups of phonological parameters in sign languages: handshape, orientation, location, and movement at the manual level, and non-manual markers (facial expressions, and head and body movements). The last type of phonological parameter (non-manual markers) may not be specified for some lexical signs. In this chapter, we describe the inventory of phonological parameters in LSC and their organization.