Hook points

Last Updated : Aug 05, 2015 |

Several hook points are illustrated in the figure and table.

Hook points are points within the Avaya SBC processing from where given actions can be executed. These hook points can be specified by using the %ENTRY_POINT built-in variable within the Where Clause.

Hook Point

Description

AFTER_NETWORK

A point in the packet path soon after the packet is received from the network.

The AFTER_NETWORK hook point can be used to modify some parameters related to SIP dialog matching. For example, when elements send messages with dialog parameters that do not conform to RFC standards, the messages can be corrected with the AFTER_NETWORK hook. Any manipulation required for Avaya SBC before matching the dialog is applied at this hook.

This hook takes the configuration of the source of the message.

You cannot use the AFTER_NETWORK hook point in the server flow.

PRE_ROUTING

After the transaction layer, before target destination for the packet is determined.

The PRE-ROUTING hook point can be used to influence the routing decisions and deliver the messages to different elements with required message modifications.

This hook takes the configuration of the source of the message.

POST_ROUTING

After target destination is determined, before the transaction layer.

The POST-ROUTING hook point can be used to modify the message based on the destination element requirements. This hook takes the configuration of the destination of the message.


packet path