Configuring Session Manager to make emergency calls from a VO logged out phone

Last Updated : Oct 08, 2020 |
Prolog information
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A VO logged out phone can perform the following functions:
  • Make emergency calls.
  • Use the functionality provided by the Virtual key.
  • Return to the previously occupied TN during registration.
You must configure Session Manager with the following changes to make a successful emergency call.
Before you begin
Do the following to let a logged out VO 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 VO logged out state is rejected by the Session Manager.
  • You must define system resources on the Device Adapter clusters to provide Virtual Office Logged Out (VOLO) TNs.
  • Before configuring the VOLO TN attribute, you must identify a continuous range of unassigned TNs. A VOLO TN must not be a TN already assigned to a Device Adapter endpoint.
  1. Configure PSAP for the 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 emergency calls from Logged out sets field, enter the TN range for logged out 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.
    2. In the SIP domain for emergency calls from Logged out sets field, enter the SIP domain.
      ADDITIONAL INFORMATION:
      The VO logged out phone uses:
      • VOLO TN range to take free VOLO TN from the assigned range.
      • SIP domain to form an anonymous SIP handle during an emergency call.
    3. Click Commit.
  10. Make at least one successful test call from a VO logged out phone. Confirm that the information is as expected at the PSAP.