The Role of Local Policy

You must configure local policies (and local policy attributes, if necessary) in order for translations between SIP and H.323 to take place. These local policies determine what protocol is used on the egress side of a session. Local policy and local policy attribute configurations make routing decisions for the session that are based on the next hop parameter that you set. The next hop can be any of the following:

IPv4 address of a specific endpoint
Hostname or IPv4 address of a session agent
Name of a session agent group

You can use the application protocol parameter in the local policy attributes configuration as a way to signal the Oracle® Enterprise Session Border Controller to interwork the protocol of an ingress message into a different protocol as it makes its way to its egress destination (or next hop).

For example, if you set the application protocol parameter to SIP, then an inbound H.323 message will be interworked to SIP as it is sent to the next hop. An inbound SIP message would travel to the next hop unaffected. Likewise, if you set the application protocol parameter to H.323, then an incoming SIP message will be interworked to H.323 before the Oracle® Enterprise Session Border Controller forwards it to the next hop destination.

The following example shows a configured local policy and its attributes used for IWF traffic.

local-policy
        from-address
                                       *
        to-address
                                       444
        source-realm                   *
        state                          enabled
        last-modified-date             2004-04-20 17:43:13
        policy-attribute
                next-hop                       sag:sag_internal
                realm                          internal
                replace-uri                    disabled
                carrier
                start-time                     0000
                end-time                       2400
                days-of-week                   U-S
                cost                           0
                app-protocol                   SIP
                state                          enabled
                media-profiles