1.5 Making Call FeaturesFeature Guide 871.5.4.6 Trunk Busy OutDescriptionThe PBX can monitor the loop current sent through analogue trunks, preventing users from seizing trunkswhere a loop current is not detected. When loop currents are not detected, trunks are set to Busy Out status,and become unable to make or receive calls. A trunk in Busy Out status cannot be used for making calls asa TIE line, as part of a trunk group, or with the ARS feature, and cannot receive trunk calls. If a user tries toseize a trunk set to Busy Out status, the user will hear a reorder tone.This is useful if some or all trunks are occasionally unavailable because of problems with the externaltelecommunications environment.Conditions• This feature is not available for the following LCOT cards:KX-TDA0181NE (LCOT 16)KX-TDA0180NE (LCOT 8)KX-TDA0183NE (LCOT 4)KX-TDA3180NE and KX-TDA3180AL (LCOT4)KX-TDA3183NE and KX-TDA3183AL (LCOT2)• Loop current detection is performed on active trunks whenever the trunk is seized and/or at fixedintervals.• When a trunk is in busy-out status, loop current detection is performed at fixed intervals, returning thetrunk to in-service status once a loop current is detected. An extension assigned as the manager canmanually change the trunk back to in-service status.• Trunk status changes are recorded in the error log of the PBX.• Busy Out status is maintained even when the PBX is reset.PT Programming Manual References[511] Manager AssignmentFeature Guide References2.2.6 Manager FeaturesUser Manual References2.1.6 Allowing Users to Seize an Unavailable Outside Line (Trunk Busy Out)
