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• Originating point of the message is a signalling point at which message is generated, i.e. there is location of the source User Part function
• Destination point of the message is a signalling point to which message is destined, i.e. there is location of the receiving User Part function
• Signalling point at which a message is received on one signalling link and transferred to another link is a Signal Transfer Point (STP)
• Signalling relation exists between two nodes when they are capable of exchanging signalling messages through signalling network
• “Modę” refers to the type of association between path taken by the signalling message and its corresponding signalling relation:
•> Associated » Non-associated » Quasi-associated