An application gains access to the SSCP session by opening an SSCP connection to the local node. To do this an application sends an Open(SSCP) Request message to the local node, which responds with an Open(SSCP) Response. The local node follows a positive Open(SSCP) Response with a Status-Session message reporting the current state of the SSCP session (see Using the SSCP Session).
The message flow is shown in the following figure. For a more detailed message flow diagram, including the LPI values used during initialization of both the SSCP and PLU sessions, see Opening the PLU Connection.