Nortel Networks NN10029-111 manual Appendix a Basic call flows Nortel Networks Confidential

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106 Appendix A: Basic call flows	Nortel Networks Confidential

The following steps provide more detail about the call flow:

1.Client A initiates the transfer of B to C. A selects blind transfer.

2.The SIP Application Module sends a Hold to B.

3.Client B sends a 200 OK message back to the SIP Application Module. The 200 OK messages contain an Allow Header, which lists the SIP methods that the client being transferred supports. If Refer is in that list, then Refer is used for the transfer; otherwise, Bye-Also is used.

4.SIP Application Module sends a 200 OK message back to Client A.

5.Ack message from Client A to the SIP Application Module.

6.Ack message from the SIP Application Module to Client B.

7.Client A sends Refer-to header with C’s information in it and a Referred-by header with A’s information in it.

8.The SIP Application Module sends the Refer message to B.

9.200 Accepted

10.200 Accepted

11.The SIP Application Module sends an Invite to B to establish the new call between B and C.

12.Invite to C.

13.SIP Application Module receives a 486 Busy Here response from Client C. This response could be any type of 4xx, 5xx, or 6xx error message.

14.The SIP Application Module sends a Notify message to Client B. The body of the Notify message contains the 486 Busy Here, in this example

15.Client B responds with an Ack.

16.The SIP Application Module sends an Ack to Client C.

17.Client B Notifies Client A, through the SIP Application Module, that Client C is Busy.

18.Notify goes to Client A.

19.Client A responds with a 200 OK.

20.200 OK to Client B.

21.There are now two possibilities:

•Invite (Unhold): Client A can re-establish the call to Client B, in which case steps 22-26 apply.

•Bye: Client A can hang up, in which case this is the last step.

NN10029-111 Standard MCP 1.1 FP1 (02.02) April 2003

Copyright © 2003, Nortel Networks

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Contents MCP SIP Application Module Page Overview How this chapter is organizedOverview Functional descriptionBack-to-Back User Agent service UserA Agent Client Internal ProtocolNetwork configuration BigMart.com BiggerMart.comInterfaces Public networkPCP ProtocolsSQL Services and features HardwareRouting and Translation services Foreign termination Local termination Call Transfer serviceTelephony routing Relationship between Telephony routing stages SIP Aliases Multiple Route Termination Interworking services Discriminator service Call Processing LanguageAuthentication services Privacy Control serviceService package enforcement Bearer Path ControlConverged PC service Network/Address Hiding service Enterprise Clients Notification support Presence Instant MessagingVoicemail server interoperability and MWI Nortel Networks Confidential Overview Registration-static and dynamic Network address book Overload controlReliability and fault tolerance Manual failover OAM&P strategy Upgrades Updating the SIP Application Module softwareUpdating the Application Module from the menu tree Updating the SIP Application Module from the pull-down menu Load list for updating Progress of update Page Alarm clearing procedures Procedure 1 Clearing the SLE701 Slee Health Monitor alarmProcedure 2 Clearing the SMDI101 alarm Configuration Configuration Nortel Networks Confidential Displaying help text Procedure 1 Adding a component Adding a componentAdding a component Configuration window top half Adding Services Progress dialog box Configuring the SIP Application Module tabs Application Server tab field descriptions Sheet 2 Field Value DescriptionConfiguration Nortel Networks Confidential Nortel Networks Confidential Configuration Configuration Nortel Networks Confidential URL Configuration Nortel Networks Confidential Nortel Networks Confidential Configuration Configuration Nortel Networks Confidential Completing the Database Base tab fields DNS SRV Locate User Svc tab field descriptions Sheet 2 Completing the Data Synchronization tab fieldsConfiguration Nortel Networks Confidential Nortel Networks Confidential Configuration Configuration Nortel Networks Confidential Nortel Networks Confidential Configuration Completing the Local Accounting Manager tab fields Completing the In Memory Database tab fields Configuration Nortel Networks Confidential Memory Database tab field descriptions Sheet 2 Completing the Location Service tab fields Location Service tab field descriptions Sheet 2 Configuration Nortel Networks Confidential Nortel Networks Confidential Configuration Configuration Nortel Networks Confidential Nortel Networks Confidential Configuration Server.blade.host.label for Privatestaticaddress whose valueCompleting the Server Subscription tab fields Addrsip Porthttp Portprotocol Nortel Networks Confidential Configuration Configuration Nortel Networks Confidential Nortel Networks Confidential Configuration Configuration Nortel Networks Confidential SipFwdAdapter tab field descriptions Sheet 2 Completing the Transport Management tab fields Nortel Networks Confidential Configuration Configuration Nortel Networks Confidential Nortel Networks Confidential Configuration Configuration Nortel Networks Confidential Nortel Networks Confidential Configuration Figure above Nortel Networks Confidential Configuration Transport Management tab subfields, cont’d Transport Management tab subfield descriptions Active-standby server group configuration Nortel Networks Confidential Configuration UDP/TCP/SSL Config values Parameter Value Description Additional SIP TCF Base tab configuration informationTCF Config details ExampleInvite Timer parameter Retransmission Off parameterTime Transaction parameter Add Defaults parameterCheck Mandatory Headers parameter Accounting management Page Performance management Page Security and Administration SecurityPage Appendix a Basic call flows Voice plus videoClient-to-client voice plus video diagram Client-to-client voice plus video call flow Application Client a Module Client BCall transfer to client diagram Client a Client C Client B Call transferCall transfer blind to client call flow Application Client a Module Client B Client CAppendix a Basic call flows Nortel Networks Confidential Failed call transfer call flow Appendix a Basic call flows Nortel Networks Confidential Authentication Authentication diagramAuthentication call flow Application Client a Module DatabaseNortel Networks Confidential Appendix a Basic call flows Page Page Page Page MCP SIP Application Module