SIP Number Normalization

This section explains the SIP number normalization feature that applies to the SIP To URI. (Currently the Oracle® Enterprise Session Border Controller supports number normalization on From and To addresses for both inbound and outbound call legs.) Number normalization includes add, delete, and replace string functions that result in consistent number formats.

Number normalization is supported for the following call types:

• SIP to SIP
• H.323 to SIP

Number normalization applies to the SIP To URI. It occurs on ingress traffic, prior to the generation of accounting records or local policy lookups. RADIUS CDR attributes are populated with the normalized numbers. Local policy matching is based on the normalized numbers.