Altigen AltiWare ACC 5.2 Administration Manual page 166

Chapter 12: Trunk Configuration
Figure 11. Setting the AA to play a prompt phrase
3. Set the Timeout to Repeat Current Level.
Figure 12. Setting Timeout to Repeat Current Level
4. Select a trunk as a testing reference—an analog trunk with a specific phone number
is best—and set the trunk In Call Routing to the Test Line Loss AA.
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AltiWare ACC 5.2 Administration Manual