When one Avaya SIP Telephone (AST) user calls another Avaya SIP Telephone (AST) user agent, Session Manager goes through different phases of processing the call. What is the maximum number of Phase Ta

Question

Options

• ATwo - imsorig and imsterm
• BTwo - origappseq and termappseq
• CFour - imsorig, origdone, imsterm, termdone
• DThree - ingress, process, egress

• A
  7% (4)
• B
  3% (2)
• C
  88% (53)
• D
  2% (1)

Explanation

Option C is correct because Avaya Session Manager processes an AST-to-AST call through exactly four Phase Tags that represent the complete lifecycle: imsorig (IMS origination - where the caller's side is processed), origdone (signaling origination processing is complete), imsterm (IMS termination - where the callee's side is processed), and termdone (signaling termination processing is complete). Option A is wrong because it only names the two start phases (imsorig and imsterm) and omits the two completion phases entirely. Option B is incorrect because origappseq and termappseq refer to application sequence configuration identifiers, not Phase Tags. Option D is wrong because ingress/process/egress describes a generic network traffic model, not Avaya Session Manager's call processing architecture.

Memory tip: Think of each call leg as a two-step handshake - every phase has a start and a done. Origination: imsorig → origdone. Termination: imsterm → termdone. Four phases, two pairs, symmetrical structure.

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