Description: This object will either be considered NULL (i.e. non usable) or non NULL (usable or activated and related to an entry in the vismTonePlanTable table). This object must be compatible with the vismDsx1TonePlanRegion object above, where both objects must either be NULL or where both objects must be non NULL. The vismTonePlanTable table consists of 32 slots which are configurable (provisionable) followed by a release dependent number of slots for built-in entries which are not configurable, but loaded from values stored in the internal firmware of the release. As releases are continued, the number of built-in slots will typically increase. The total number of slots in this table consists of the sum of the 32 provisionable slots plus an unspecified number of built-in slots and the built-in number and this sum represents the size of this table.

In the case where these two objects are non NULL, this object, along with the vismDsx1TonePlanRegion object above, must exactly match an entry in the vismTonePlanTable. In the case where these objects are considered to be a NULL object, its behavior and contents are described in paragraph five of this description block.

The allowed range and contents of this object in the non NULL case is the same as the tonePlanVersionNumber object in the vismTonePlanTable. This object will thus consist of a non zero numeric value. And this object plus the vismDsx1TonePlanRegion object above, must exactly match an existing valid entry in the vismTonePlanTable.

In the case where this object is NULL, this object will consist of a zero numeric value. A NULL value for this object will make the vismDsx1RingingTO, vismDsx1RingBackTO, vismDsx1BusyTO, vismDsx1ReorderTO, vismDsx1DialTO, vismDsx1StutterDialTO, vismDsx1OffHookAlertTO, and vismDsx1RemoteRingback.