Nortel Networks NN10029-111 manual Instant Messaging, Presence

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22 Overview	Nortel Networks Confidential

For more information and the procedure for setting up Instant Message notifications to emergency numbers, see the SIP Provisioning Client User Guide.

Instant Messaging

Instant Messages are routed in parallel only to a subscriber's dynamically registered routes (see “Registration—static and dynamic” on page 24). This is in contrast to session initiation requests, which are subject to CPL routing logic. Upon receipt of an instant message, a client may respond back to the address supplied in the Contact header. This ensures that the response is sent back to the same client device that originally sent the message.

Presence

When a user initially registers, by default their presence status is set to “on-line” in the SIP registration message. Users subscribe to watch the status of other users, and to coordinate the status of their own devices. This information is maintained in an in-memory table on the SIP Application Module (Presence software). The information that is stored in this table includes:

•the user to be watched

•the party requesting the subscription

•the correlation information identifying that particular subscription request

•contact information regarding where to send the notifications that are generated as a result of the subscription being active

When a user changes their presence (for example, to Busy), a registration message is automatically sent to the SIP Application Module.

The SIP Application Module then checks its in-memory table to see what their previous presence state was. If the update causes a material change in their presence state, the SIP Application Module looks up which users need to be notified of the change (also in memory). This is done by sending a Notify message to each user at every contact contained in the table. For more information, refer to the MCP SIP Presence Basics document.

Voicemail server interoperability and MWI

In order to accomplish voicemail server interoperability and MWI (message waiting indication) notification, the SIP Application Module

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