Structure and Interfaces of SCCP

SCCP consists of the parts shown in Fig. 14.1-2. Connectionless control (SCLC) and connection-oriented control (SCOC) handle the message transfer in the corresponding services.

SCCP users (Subsystems)

N-connect Request N-connect Response N-data Request N-exped. Data Request N-data Ack. Request N-disconnect Request N-reset Request N-reset Response N-inform Request

N-connect Indication N-connect Confirmation N-data Indication N-exped. Data Indication N-data Ack. Indication N-disconnect Indication N-reset Indication N-reset Confirmation N-inform Indication

Request Type 1 Request Type 2 Reply

N-unitdata Request N-unitdata Indication N-notice Indication

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