In this section we describe the functions and procedures relating to the transfer of messages between signaling points (i.e., signaling network nodes). These nodes are connected by signaling links involving layers 1 and 2 described in Sections 14.5 and 14.6. Another important function of layer 3 is to inform the appropriate entities of a fault and, as a consequence, carry out rerouting through the network. The signaling network functions are broken down into two basic categories:

• Signaling message handling

• Signaling network management (see Section 14.4.1 for description)

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