165 Appendix D: Programming the host switchCOMPANION 200 Installation and Maintenance Guide P0725810 Issue 3.0• Need for privacy of telephone conversations.Discuss these factors with the System Administrator to ensure thateach user’s requirements are considered before the method ofassigning a host switch extension number to the portable isdetermined. The System Administrator ensures that the lines to thehost switch are wired and that the host switch is programmedaccording to the method selected.Independent assignmentA portable is independent when the user is assigned a portable only.The host switch directory number is assigned to the portable.A portable that is assigned independently on the COMPANION 200system is supported by an access line connecting the Controller tothe host switch. The access line is programmed at the host switch asthough it supports a standard analog telephone.• Independent assignment can be used with any host switch.• The portable can be given access to any host switch featuresavailable to a standard analog telephone.• A call in progress on the portable can be continued on any othertelephone by using Call Transfer, or any other similar host switchfeature. The call is interrupted briefly while the feature isperformed.• Privacy of telephone conversations is ensured when independentassignment of a host switch directory number is used. Since thedirectory number is not shared, access to a conversation that is inprogress on the portable cannot be gained through any othertelephone.Parallel assignment (separate directory numbers)A portable and a wired telephone are assigned in parallel when theuser is assigned both, and each has its own host switch directoryFeature IndependentassignmentParallelassignmentTwinned assignmentMADN SCA MADN MCA Bridge-tapHost switchdependentno no yes yes noWired telephonedependentn/a no no yes yesPrivacy ensured yes yes no yes no
