Page 1351 of 1814International ISDN PRI Feature description and administration1356Network Drop Back Busy and Off-hookQueuingContentsThe following are the topics in this section:Feature description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1351Operating parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1352Feature interactions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1353Off-Hook Queuing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1353Drop Back Busy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1353Feature packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1353Feature implementation . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1354Task summary list . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1354Feature operation . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1356Feature descriptionThe Network Drop Back Busy (DBB) feature allows network calls that areblocked at a tandem node to be rerouted (dropped back) to the originatingnode. The calls are then directed over an alternate route. The NetworkOff-Hook Queuing (OHQ) feature allows Off-Hook Queuing to beconfigured at a tandem node, thereby allowing Off-Hook Queuing at thatnode.Both DBB and OHQ give the originating node control over the routing of alloutgoing network calls.
