Refer to the Exhibit.

In step 3, Avaya Aura® Communication Manager (CM) sends SIP Options to 1011112 looking for a 200 ok response to check it is reachable.

In step 2, Avaya Aura® Session Manager (SM) matches 1011111 with a Communication Profile, and uses the defined Originating Application Sequence to route the call to Avaya Aura ® Communication Manager.

In step 1, when 1011111 draws dial tone it sends an Invite to Avaya Aura® Session Manager (SM) with the Request URI containing 1011111.

In step 2, the Avaya Aura® Session Manager (SM) uses a dial pattern and routing policy to route the call to Avaya Aura® Communication Manager (CM).

In step 4, Avaya Aura® Communication Manager (CM) sets up the media path between the two endpoints.

In step 5, the call is terminated by either endpoint or by a network failure.