In this section:

Scenario

SBC performs protocol repair.

Background Information

Refer to the background information in Basic Service Availability - DNS. 

Description

Figure 1: Protocol Repair


  1. The public internet/ISP receives SIP messages with slight variations in SIP headers, parameter formats etc.
  2. The SBC repairs the protocol information, discards irrelevant and/or offending information or inserts missing information based on the policy installed by the operator. A common "normalized" SIP message passed to the core network simplifies implementation and supports better interoperability.