Authentication

Nortel Networks Confidential	Appendix A: Basic call flows 107

22.SIP Application Module sends an Invite (Unhold) to Client B.

23.Client B responds with a 200 OK.

24.The SIP Application Module sends the Invite to Client A.

25.Client A responds with an Ack.

26.The SIP Application Module sends an Ack to Client B and the call is re-established.

Figure 6, “Authentication diagram,”and Figure 7, “Authentication call flow,” show the basic call flow for Authentication. You can configure the SIP Application Module to support Authentication on Invite or Authentication on Registration. Following these diagrams is a detailed, step-by-step example of Authentication on Registration.

MCP SIP Application Module Basics