Nortel Networks NN10029-111 manual Call transfer

102 Appendix A: Basic call flows Nortel Networks Confidential

4.Client A sends an ACK message to the SIP Application module, which sends the ACK on to Client B.

Note: The terminating client starts sending packets. The connection is established.

5.Client B sends Bye to end the call.

6.Client A responds with a 200 OK.

Call transfer

Figure 3, “Call transfer to client diagram,”and Figure 4, “Call transfer (blind) to client call flow,” show the basic call flow for a call transfer. A detailed, step-by-step illustration follows these diagrams.

Figure 3	Call transfer to client diagram
Client A		Client C
	S
	I	P
	P
		I
		S
	P
Client B	I
	S
		Bearer path
		Signaling path

NN10029-111 Standard MCP 1.1 FP1 (02.02) April 2003 Copyright © 2003, Nortel Networks