IP Telephony Deployment ModelNotes/CommentsCodec SelectionNotes/CommentsLegacy Voice-Mail Integration RequirementsNotes/CommentsLegacy PBX Integration RequirementsNotes/CommentsSizing the CallManager ClusterNotes/CommentsBranch Office IPT RequirementsNotes/CommentsClass of Restriction RequirementsNotes/CommentsCall-Routing and Dial Plan RequirementsNotes/CommentsSizing the PSTN/Gateway TrunksNotes/CommentsPower Requirements (Per Site/Per Switch Specific)Call Admission Control ConsiderationsNotes/CommentsCorporate Directory RequirementsDirectory Access RequirementsNotes/CommentsDirectory IntegrationNotes/CommentsConferencing, Transcoding, and MTP Requirements for Central SitesNotes/CommentsMusic on Hold RequirementsNotes/Comments