How does presence operate within applications? This question refers to intelligent communication and the increased productivity and efficiency when presence is established. SIP, when paired with web and XML-based applications, allow for business application presence. When a directory of contacts is linked to a business application, users can see others’ availability within the application. This is rather than having to open up an additional application, such as an instant messaging service to begin a conversation.

In fact, many applications do not require any sort of customization on the side of the client. Existing libraries, when linked, are equipped with functions that can communication with presence servers. These include DLLs in Windows and libraries through Linux.

Thus far, we understand that SIP enables the recognition of presence and subsequent communication within a particular application. But SIP can also increase efficiency of this said communication. For instance, open web services can allow applications to automatically check for the presence of others and to initiate sessions, if a protocol has been set up for it. The human client doesn’t need to click to start the process; instead the application can begin the session independently. Changes or queries can be made quickly.

With SIP function, a client doesn’t have to open up several applications. For instance, one application can check an inventory list, alert the client to when a product needs to be re-ordered, check the presence of the vendor online, and even begin a session to initiate the re-ordering. And all of this can be done in one program. This is significantly different from an older process, where the client would need to manually check the program. Then find the contact information of the vendor. Then call the vendor. And then place the order. And then update the database. All of this equals more steps and more time. Reducing both steps and time in a major benefit of integrating SIP with business applications.