Building redundancy into your Cisco EGW 2200 application is recommended to maximize uninterrupted service if there is a component or network failure. Cisco EGW 2200 applications have been designed to make optimum use of redundant components, providing automatic switchover and maintenance of call data during periods of critical hardware or software problems.

Read Planning for Redundancy (Microsoft Word document) for a description of these redundancy options and what you can expect when a component or network failure occurs.