JTAPI TUTORIAL PDF

JtapiPeer is the first object an application must instantiate. Provider A Provider represents the telephony software-entity that interfaces with a telephony subsystem. A Provider is created and returned by the JtapiPeer. This method sets up any needed communication paths between the application and the Provider.

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JtapiPeer is the first object an application must instantiate. Provider A Provider represents the telephony software-entity that interfaces with a telephony subsystem. A Provider is created and returned by the JtapiPeer. This method sets up any needed communication paths between the application and the Provider.

The string given is one of the services listed in the JtapiPeer. The rest of the JTAPI objects are derived from the provider and also the provider is responsible for the various actions the application is designed to make with the JTapi.

For example, provider is will deliver Address events in case we monitor an Address or create a call between a local Address and a remote Address example of an outgoing call. The Provider implementation controls access to Addresses and Terminals by limiting the domain it presents to the application. Address An Address object represents what we commonly think of as a "telephone number". The purpose of the address could be something different than a telephone number if the underlying network is not a telephone network.

As an example if the underlying network is an IP network; then the address might represent an IP address e. When the Address object is created, a unique string name is assigned to it e.

The method Address. Address objects may be classified into two categories: local and remote. Local Address objects are those addresses which are part of the local telephone system domain, for example the extension numbers of a PBX. These Address objects are created by the implementation of the Provider object when it is first instantiated. Remote Addresses are not reported via the Provider. Note that applications never explicitly create new Address objects.

Terminal A Terminal represents a physical hardware endpoint connected to the telephony domain. In other words, a Terminal is the telephone set of a PBX. When the Terminal object is created, a unique string name is assigned to it and does not change throughout the lifetime of the object.

The method Terminal. Important to notice here is that in contrary with the Address name, the name of the Terminal may not have any real-world interpretation since in order to interact with a Terminal e. Terminal objects may be classified into two categories: local and remote. Local Terminal objects are those terminals which are part of the local telephone system domain, for example the telephone sets of a PBX. These Terminal objects are created by the implementation of the Provider object when it is first instantiated.

Remote Terminal objects are not reported via the Provider. Note that applications never explicitly create new Terminal objects. Address and Terminal objects Address and Terminal objects exist in a many-to-many relationship. An Address object may have zero or more Terminals associated with it. For each Terminal associated with an Address, that Terminal must also reflect its association with the Address. Since the implementation creates Address and Terminal objects, it is responsible for insuring the correctness of these relationships.

The Terminals associated with an Address is given by the Address. An association between an Address and Terminal object indicates that the Terminal contains the Address object as one of its telephone number addresses. In many instances, a telephone set represented by a Terminal object has only one telephone number represented by an Address object associated with it.

In more complex configurations, telephone sets may have several telephone numbers associated with them. Likewise, a telephone number may appear on more than one telephone set. Call A Call object models a telephone call. A Call can have zero or more Connections.

A two-party call has two Connections, and a conference call has three or more Connections. Each Connection models the relationship between a Call and an Address, where an Address identifies a particular party or set of parties on a Call. A Call maintain a list of the Connections on that Call.

Applications obtain an array of Connections associated with the Call via the Call. A Call retains a reference to a Connection only if it is not in the Connection. Therefore, if a Call has a reference to a Connection, then that Connection must not be in the Connection.

When a Connection moves into the Connection. The Provider maintains knowledge of the calls currently associated with it. Applications may obtain an array of these Calls via the Provider. A Provider may have Calls associated with it which were created before it came into existence. The Provider maintains references to all calls until they move into the Call. Applications may create new Calls using the Provider. A new Call is returned in the Call.

IDLE state. Applications may then use this idle Call to place new telephone calls. Once created, this new Call object is returned via the Provider. Address and Call objects Address objects represent the logical endpoints of a telephone call.

A logical view of a telephone call views the call as originating from one Address endpoint and terminates at another Address endpoint. Address objects are related to Call objects via the Connection object. The Connection object has a state which describes the current relationship between the Call and the Address. Each Address object may be part of more than one telephone call, and in each case, is represented by a separate Connection object.

The Address. An Address is associated with a Call until the Connection moves into the Connection. At that time, the Connection is no longer reported via the Address. Therefore, the Address.

The Java Telephony API specification states that the implementation is responsible for reporting all existing telephone calls when a Provider is first created. This implies that an Address object must report information regarding existing telephone calls to that Address. In other words, Address objects must reports all Connection objects which represent existing telephone calls.

Terminal and Call objects Terminal objects represent the physical endpoints of a telephone call. With respect to a single Address endpoint on a Call, multiple physical Terminal endpoints may exist. Terminal objects are related to Call objects via the TerminalConnection object. TerminalConnection objects are associated with Call indirectly via Connections. A Terminal may be associated with a Call only if one of its Addresses is associated with the Call.

The TerminalConnection object has a state which describes the current relationship between the Connection and the Terminal. Each Terminal object may be part of more than one telephone call, and in each case, is represented by a separate TerminalConnection objet.

The Terminal. At that time, the TerminalConnection is no longer reported via the Terminal. Therefore, the Terminal. This implies that an Terminal object must report information regarding existing telephone calls to that Terminal. In other words, Terminal objects must report all TerminalConnection objects which represent existing telephone calls. Connection A Connection represents a link i. The purpose of a Connection object is to describe the relationship between a Call object and an Address object.

A Connection object exists if the Address is a part of the telephone call. Applications use the Connection. This is termed a logical view of the Call because it ignores the details provided by the Terminal and TerminalConnection objects which are also associated with a Call. In many instances, simple applications such as an outcall program may only need to concern itself with the logical view. In this logical view, a telephone call is views as two or more endpoint addresses in communication.

The Connection object describes the state of each of these endpoint addresses with respect to the Call. Connection objects are immutable in terms of their Call and Address references. In other words, the Call and Address object references do not change throughout the lifetime of the Connection object instance. The same Connection object may not be used in another telephone call.

Particularly, when a Connection moves into the Connection. Typically, when a Connection moves into the Connection.

Connections objects are containers for zero or more TerminalConnection objects. Connection objects represent the relationship between the Call and the Address, whereas TerminalConnection objects represent the relationship between the Connection and the Terminal. The relationship between the Call and the Address may be viewed as a logical view of the Call. The relationship between a Connection and a Terminal represents the physical view of the Call, i.

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Thus, at line 17, an array of Addresses is being retrieved and printed out. Similarly, at line 28, an array of Terminals is being retrieved and printed out. Notice, that its not the actual object that is printed out, but the name of the Address or the Terminal in question each time. As we will see in a future articles, an Address or Terminal interface among other methods, provides a getName method in order to retrieve the unique name of the object.

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