Nortel Networks Confidential | Appendix A: Basic call flows 103 |
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Figure 4 Call transfer (blind) to client call flow
| SIP |
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| Application |
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Client A | Module | Client B | Client C | |
Call established between A and B | ||||
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| 1. Invite (hold) |
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| 2. Invite (hold) |
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| 3. 200 OK |
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| 4. 200 OK |
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| 5. Ack |
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| 6. Ack |
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| 7. Refer (to C) |
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| 8. Refer (to C) |
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| 9. 202 (accepted) |
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| 10. 202 (accepted) |
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| 11. Invite (to C) |
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| 12. Invite (to C) |
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| 13. 200 OK |
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14. 180 Ringing |
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| 15. 200 OK |
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| 16. Ack |
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| 17. Set up | |
| 18. Ack |
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| 19. Notify (200 OK) |
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| 20. Notify (200 OK) |
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| 21. 200 OK |
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| 22. 200 OK |
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| Call established between A and C |
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| 23. Bye |
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| 24. Bye |
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| 25. 200 OK |
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| 26. 200 OK |
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| Call established between B and C | ||
Copyright © 2003, Nortel Networks | MCP SIP Application Module Basics |
