This function provides a means for rerouting traffic around failed or congested nodes. Route management is a function of Level 3 and works together with link management. Route management informs other nodes of the status of the affected node. This function provides flow control if a node has become congested. It allows the network to control the flow of certain messages based on protocol.
Traffic management deals with a specific user part within an affected node.
For example, if ISUP is not available at a particular node, a traffic management message can be sent to adjacent nodes informing them that ISUP is not available, without affecting TCAP messages on the same node. Message Routing Message discrimination in Level 3 will pass messages to message routing if it determines the message is not local. Message routing reads the called and calling party addresses to determine the physical address in the form of a point code. Every SS7 node must have its own unique point code. Message routing determines the point code from an address contained in the routing table.