Assured Services Admission Control

Last Updated : Dec 28, 2016 |
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With Assured Services Admission Control (ASAC), the security administrator can:
  • Assign call budgets for SIP trunk groups.
  • Assign inbound and outbound call budgets for audio and video to each SIP trunk group.
  • Monitor bandwidth usage using the Call Admission Control feature.
  • Configure a precedence level on a SIP deskphone. Users can select a precedence level for each call on the SIP deskphone. The maximum precedence level that any given user can use is defined by his class of restriction.
Use Multiple Level Precedence and Preemption (MLPP) must be enabled to access this feature. Use MLPP to preempt the calls as necessary. For more information about enabling MLPP, see Chapter 123: Multiple Level Precedence and Preemption. Users with MLPP service enabled can specify the precedence level of each call they place. During call processing, this precedence level is used to assure preferential call completion of higher precedence calls within the same MLPP network domain, even if that means preempting lower precedence calls.

Trunk preemption

The security administrator can assign budget to precedence calls for call processing purpose. Communication Manager provides call budgets for SIP trunk groups. Communication Manager enforces calls in accordance with the precedence of the call and checks for the direction of the call to compare the call with the call budget. Communication Manager supports incoming call budget and outgoing call budget thresholds for SIP trunk groups. Communication Manager allows the administrator to assign thresholds. A low threshold is used to clear previous threshold alarms. Whereas, a high threshold is used to notify that the incoming or outgoing call count is at a level and that the call blocking and preemption will soon start to occur.

Network preemption

For network preemption to work, Communication Manager must be configured to use Session Manager as the bandwidth manager. To configure Session Manager as the bandwidth manager, see Enabling CAC sharing between Communication Manager and Session Manager. The security administrator can assign bandwidth budgets for audio and video, to each network link on Session Manager. When server or network resources are running too low to allow additional calls, call preemption occurs. For more information, see Administering Avaya Aura Session Manager.

Endpoint preemption

Users can place and receive a precedence call. Called party with no idle appearance will have lower precedence over the calls preempted by higher precedence call. For more information, refer to the endpoint documentation.