IAD Group

The IAD Group object is a child of the Call Agent object.

An IAD Group corresponds to an underlying resource with a limited bandwidth. Typically an IAD Group is defined for each DSLAM associated with the VP3000, and all IADs subscribed to that DSLAM belong to the same IAD Group. IAD Groups enable Call Admission Control to be performed for the transmission links from the DSLAMs.

The bandwidth required on the ATM virtual path to the DSLAM is determined by specifying the maximum number of concurrent calls that can be in progress on the IAD Group at any time. The maximum number of concurrent calls is specified at two levels:

Actions
Create Enable Activate
Delete Disable Deactivate
Apply Reset Statistics Refresh

Parameter

Access

Description
Group index Read only Local index identifying the IAD Group. This index is referenced by the IADs that are associated with the IAD Group.
Current maximum concurrent calls allowed (all types) Read only The total of the Maximum concurrent calls allowed (all types) values for all IADs in this IAD Group.
Current maximum concurrent calls allowed (PCM only) Read only The total of the Maximum concurrent calls allowed (PCM only) values for all IADs in this IAD Group.
Maximum concurrent calls allowed (all types) Change Maximum number of calls that can be in progress at any one time on IADs in this IAD Group. This count includes both ADPCM (G.726) and PCM (G.711) calls. This value allows you to restrict the amount of bandwidth used for the IAD Group, on the assumption that not all voice ports on all IADs will need to be in use at the same time. It operates in a similar way to restricting the maximum number of concurrent calls on each IAD. This value cannot exceed the value of Current maximum concurrent calls allowed (all types) for this IAD Group. If you reduce it so that it is below the value of Calls in progress (all types) for this IAD Group, the existing calls will be maintained, but no new calls will be accepted for this IAD Group until enough calls have ended to leave the "calls in progress" count below the new maximum. Changing this value will change the value of the Required sustained cell rate parameter; you may need to update the DSLAM configuration to reflect this.
Maximum concurrent calls allowed (PCM only) Change Maximum number of PCM (G.711) calls that can be in progress at any one time on IADs in this IAD Group. This value allows you to restrict the amount of bandwidth used for the IAD Group, on the assumption that not all voice ports on all IADs will need to be in use at the same time. It operates in a similar way to restricting the maximum number of concurrent calls on each IAD. This value cannot exceed the value of Current maximum concurrent calls allowed (PCM only) or Maximum concurrent calls allowed (all types) for this IAD Group. If all IADs in the IAD Group support only PCM and not ADPCM (AAL2 channel profile is set to Profile 9), this value should be the same as Maximum concurrent calls allowed (all types). If you reduce the maximum concurrent calls allowed so that it is below the value of Calls in progress (PCM only) for this IAD Group, the existing calls will be maintained, but no new calls will be accepted for this IAD Group until enough calls have ended to leave the "calls in progress" count below the new maximum. Changing this value will change the value of the Required sustained cell rate parameter; you may need to update the DSLAM configuration to reflect this.
Required sustained cell rate Read only The sustained cell rate required to support calls on this IAD Group. This is calculated from the values for Maximum concurrent calls allowed (all types) and Maximum concurrent calls allowed (PCM only).
Calls in progress (all types) Read only The number of calls currently in progress on this IAD Group. This count includes both ADPCM (G.726) and PCM (G.711) calls, and includes any subscriber for which a tone (such as the reorder tone) is being played, regardless of whether the subscriber is actually in a call. This count is normally less than Maximum concurrent calls allowed (all types) when the Media Gateway is in a steady state, but may briefly exceed the maximum in transient conditions when calls are being released.
Calls in progress (PCM only) Read only The number of PCM (G.711) calls currently in progress on this IAD Group. This count includes any PCM subscriber for which a tone (such as the reorder tone) is being played, regardless of whether the subscriber is actually in a call. This count is normally less than Maximum concurrent calls allowed (PCM only) when the Media Gateway is in a steady state, but may briefly exceed the maximum in transient conditions when calls are being released.
Requested status Read only Specifies whether an administrator has attempted to enable the IAD Group. Values:
  • Enabled
    The object has been enabled.
  • Disabled
    The object has not been enabled or has been disabled.
Actual status Read only Specifies the current status of the IAD Group. Values:
  • Enabled
    The object has been enabled.
  • Disabled
    The object has not been enabled or has been disabled.