The next thing that needs to be altered is under the Audio Configuration heading. The following change is required.
Preferred Codec: G729a
The final item that requires changing is under the Dial Plan heading. The dial plan will vary from provider to provider. The dial plan show below is an example only, and may require alteration depending on which VoIP provider you subscribe to. See Appendix A for a detailed description of how dial plans work.
Dial Plan: (*xxxx.)