# New features in Avaya one-X Agent 2.5

- Alternate Server Address definition: This feature provides an option to define other server addresses as registration alternatives if registration with the primary server fails.

- Authorization and carrier code: This feature supports authorization and carrier code, which is mandatory in some countries. Authorization and carrier code is required for making external calls from the Avaya one-X Agent application. A user or an administrator can assign the authorization and carrier code to the Avaya one-X Agent application and define the call types that the application must append to make external calls.

- Multiple local area code: This feature provides the option to specify more than one local area code for a local calling area in the Dialing Rules field of the Avaya one-X Agent application.

- Interoperable with IM and presence: This feature supports integration with Avaya one-X Communicator.

Parent topic: Avaya one-X Agent overview
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