Configuring Session Manager to make emergency calls from a DVLA phone

Last Updated : Oct 08, 2020 |
Prolog information
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A DVLA phone can perform the following functions:
  • Make emergency calls.
  • Use the functionality provided by the Virtual key.
You must configure Session Manager with the following changes to make a successful emergency call.
Before you begin
Do the following to let a default VO logged out set to make emergency calls such as 911 and 112:
  • You must select Allow Unauthenticated Emergency Calls check box on Session Manager. If the Allow Unauthenticated Emergency Calls check box is clear, then all the emergency calls for phones in the DVLA state is rejected by the Session Manager.
  • You must define system resources on the Device Adapter clusters to provide Default VO Logged Out (DVLA) TNs.
  • Before configuring the DVLA TN attribute, you must identify a continuous range of unassigned TNs. A DVLA TN must not be a TN already assigned to a Device Adapter endpoint.
  1. Configure PSAP for the default VO logged out phones to test the emergency calls.
  2. Log in to System Manager by using administrative credentials.
  3. Navigate to Elements Session Manager Global Settings.
  4. Select the Allow Unauthenticated Emergency Calls check box, and click Commit.
  5. Navigate to Elements Avaya Breeze® Configuration Attributes.
  6. Click the Service Clusters tab.
  7. In the Cluster field, click the appropriate application cluster.
  8. In the Service field, click DeviceAdapter.
  9. Navigate to the Virtual Office/Emergency Calls section and do the following:
    1. In the TN range for DVLA sets field, enter the TN range for DVLA sets.
      ADDITIONAL INFORMATION:
      The format of TN range is lll-ss-cc-uu:lll-ss-cc-uu, where:
      • lll is a multiple of 4.
      • ss is 00 or 01.
      • cc is 00 to 15.
      • uu is 00 to 31.
      • : is the delimiter between the lowest and highest TN in the range. For example, 112-00-00-00:112-00-03-31 allocates 4 blocks of 32 instances, for 128 emergency call TNs.
      The following error message is displayed when a user tries to set a value different from the above format:
      "Service Globals : The attribute TN range for DVLA sets does not contain a valid value based on the attribute type. Please correct the entry.".
    2. Click Commit.
  10. Make at least one successful test call from a default VO logged out phone. Confirm that the information is as expected at the PSAP.