Nortel Networks NN10029-111 manual Overview, Functional description

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4 Overview	Nortel Networks Confidential

Overview

The SIP Application Module is a service execution engine that provides the following functionality:

•core signaling functionality enabling communication among SIP clients

•SIP proxy server

•Back-to-Back User Agent

•SIP Registration

•CPL interpretation

•Location server

•optional Presence subscription and notification (For more information on the Presence feature, see the MCP SIP Presence Basics document.)

The SIP Application Module handles SIP sessions and applications and provides the core services that enable communication between SIP clients. The SIP Application Module is housed on the SIP Application Server.

Functional description

The SIP Application Module includes the following components:

•Back-to-Back User Agent (BBUA)/Proxy Server

Although the BBUA and Proxy Server are basically two different logical entities within the same physical server, they both act as clients and servers. The SIP Application Module decides on a call-by-call basis whether to process the request as a pure Proxy or BBUA.

The Proxy Server processes SIP requests and responses, rewrites headers, modifies request-URIs (Universal Resource Indicator), performs location look-up, and forwards requests to SIP clients or other servers in the network.

The SIP Application Module provides a fully session-stated proxy; in other words, the SIP Application Module maintains a call state for the entire session.

The BBUA extends the proxy function to perform advanced functions such as

—originating new calls

—tearing down existing calls

—modifying messages

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 LanguagePrivacy Control service Service package enforcementAuthentication services 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 Additional SIP TCF Base tab configuration information TCF Config detailsUDP/TCP/SSL Config values Parameter Value Description 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