Please note that although Avaya intend that releases of the IP Office TAPI Driver will provide backwards compatibility with earlier versions of the IP Office TAPI Driver, in terms of the feature set provided, Avaya cannot guarantee that the behavior of IP Office will remain unchanged. Due to improvements in IP Office, the precise sequence, timing and content of TAPI events are likely to change. It is recommended that developers use an event driven programming model to make their applications resilient to such changes.