Refer to the Exhibit. A SIP user is calling an H.323 user. In this call flow, in which phase does Avaya Aura® Communication Manager (CM) handle the call processing for each endpoint?

Question

Exhibit

Options

• Aboth endpoints in the originating phase
• BH.323 endpoint in originating phase, SIP endpoint in terminating phase
• CSIP endpoint on originating phase, H.323 endpoint in terminating phase
• Dboth endpoints in the terminating phase

• A
  5% (2)
• B
  3% (1)
• C
  81% (30)
• D
  11% (4)

Explanation

Option C is correct because in CM's call model, phases are assigned based on the role each endpoint plays in the call: the calling party (SIP user) is handled in the originating phase, and the called party (H.323 user) is handled in the terminating phase - regardless of endpoint type.

• Option A is wrong because the H.323 endpoint is the destination, not the initiator, so it cannot be in the originating phase.
• Option B is wrong because it reverses the roles - the SIP user placed the call (originating), not the H.323 user.
• Option D is wrong because the SIP caller must be in the originating phase; both parties cannot be terminating since someone has to initiate.

Memory tip: Tie the phase to the direction of the call arrow, not the endpoint type - the arrow leaves from the originating party (SIP caller) and points to the terminating party (H.323 callee). Endpoint protocol (SIP vs. H.323) is irrelevant to phase assignment.

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