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Overview: Siebel eBusiness Application Integration Volume I > Understanding Integration Paradigms > Usage Models >

Real-Time

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With a real-time model, you may choose to deploy Siebel applications as a client or as a service. As a client, Siebel applications access another program or initiate a transaction on an external system. As a service, Siebel applications are accessed by an external program to query, insert, update, or delete data without any initiation from the Siebel application.

Typical scenarios involving Siebel application as a client include:

Replicating data such as maintaining the SAP order number in the Siebel application, so users can relate Siebel orders to SAP orders.
Accessing a mainframe system to retrieve customer account information in real time and display it within the Siebel application's interface.
Sending sales opportunities to trading partners over your corporate firewall without compromising system security.
Accessing an external system's function to check inventory and then displaying the results in a Siebel application.

Typical scenarios involving Siebel applications as a service include:

An external Web application accessing a Siebel application to retrieve contact information.
Call center software extracting service request information from a Siebel application.

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