Nortel Networks NN10029-111 manual Routing and Translation services Foreign termination

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12 Overview	Nortel Networks Confidential

•Service package enforcement

•Authentication services

•Converged PC service

•Network/Address Hiding

•911 Notification support

•Instant Messaging

•Presence

•Voicemail server interoperability and MWI (message waiting indication) notification

•Registration

•Network address book

•Overload control

•Reliability and fault tolerance

Routing and Translation services

Foreign termination

If an incoming request specifies a domain that is not served by (in other words, is not local to) the SIP Application Module, the SIP Application Module tries to route that request to the appropriate server for that domain.

The first step in this process is to query the DNS SRV, if one is configured in the system, in order to obtain the IP address of the server associated with the foreign domain.

Note: A DNS SRV extends the basic functionality provided by a traditional domain name server (DNS). It allows a protocol field to be the query for a particular domain and uses that protocol field to provide the correct IP address of the server for the specified protocol. For example, clients may query the server with a domain name of nortelnetworks.com and protocol field of sip. The DNS SRV would then respond with the IP address of the SIP server for that domain (which may differ from, for example, the H.323 server). This allows a domain to have different servers for different protocols.

If this query fails to find the IP address or if a DNS SRV is not configured, the SIP Application Module attempts to look up the foreign domain in the database to see if an IP address has been provisioned for this foreign domain (see the SIP Provisioning Client User Guide for

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 network PCP ProtocolsSQL Services and features HardwareRouting and Translation services Foreign termination Call Transfer service Local terminationTelephony 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 Instant Messaging PresenceVoicemail 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 parameterAdd Defaults parameter Time Transaction 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