TAPI
User Guide
Release 4.0
Part No. 77000TAPI02
April 2001
Printed in the U.S.A. (2106)
WARNING!
Toll fraud is committed when individuals unlawfully gain access to customer
telecommunication systems. This is a criminal offense. Currently, we do not know of
any telecommunications system that is immune to this type of criminal activity. NEC
America will not accept liability for any damages, including long distance charges,
which result from unauthorized and/or unlawful use. Although NEC America has
designed security features into its products, it is your sole responsibility to use the
security features and to establish security practices within your company, including
training, security awareness, and call auditing.
NOTICE
While every effort has been made to ensure accuracy, NEC America will not be liable
for technical or editorial errors or omissions contained within the documentation. The
information contained in this documentation is subject to change without notice.
This documentation may be used only in accordance with the terms of the NEC
America License Agreement.
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Shelton, CT. 06484
Telephone: 203-926-5400
Fax: 203-929-0535
Web site: cng.nec.com
TRADEMARKS
NEC, NCS Serv, NCS Ware, Extended Caller ID, N-TeliTouch, NCS LinkPlus, NCS
Console, NCS Admin and N-TeliCall are trademarks or registered trademarks of
NEC.
All other brand names mentioned are trademarks or registered trademarks of their
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Copyright © NEC America 2001. All rights reserved.
Printed in U.S.A.
4502-0001-A1
TAPI
4.0 User Guide
Table of Contents
Using TAPI with NCS Ware 4.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Introduction to TAPI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
NEC's TAPI Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Server Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Client Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Restrictions and Exceptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
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Table of Contents
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TAPI
4.0 User Guide
Introduction to TAPI
Using TAPI with NCS Ware 4.0
TAPI stands for Telephony Application Programming Interface. It is a
specification by Microsoft for writing
purpose is telephony and call control) or
application's purpose is something else, but it supports telephony functions
such as calling a contact - e.g. Microsoft Outlook, Act, Goldmine)
applications. There are several off-the-shelf applications such as Microsoft
Outlook, Act and Goldmine that support TAPI for calling contacts right
from the application without having to manually enter the number on the
telephone's keypad. If you have such an application installed at your site
and would like to use this functionality using the NCS Serv system, you
should read this document and install and configure the appropriate
components.
Introduction to TAPI
TAPI is a collection of interfaces that are based on a 3-layer telephony
architecture. This architecture is depicted in Fig. 1.
telephony-based
telephony-enabled
(the application's
(the
TAPI
Figure 1. 3-Layer TAPI Architecture
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Using TAPI with NCS Ware 4.0
The service providers implement the telephony functions necessary to
write a telephony application as specified in the TSPI. The telephone
system manufacturer typically implements this layer so that all the TAPI
applications can function with the telephone system. Microsoft
implemented the TAPI middleware and this layer aggregates all the service
providers available and provides a uniform API to the applications. It also
adds value by implementing a few other high level functions. The
application layer is where all the applications such as Microsoft Outlook
function. These applications are written to TAPI specification so that they
can work with any telephone system that has its own service provider.
TAPI functions are of two kinds:
• First party call control functions - these are the functions that control
the device directly. These functions are specified in TAPI version 1.4.
• Third-party call control functions - these are functions that instruct a
telephone system such as the NCS Serv system to control telephony
devices such as trunks and extensions. These functions are specified
in TAPI version 2.1.
With Windows 2000, Microsoft released a new version of TAPI called
TAPI 3.0 that provides an object oriented API for telephony functions.
Even though the application layer specification has been completely
rewritten, the service provider interface is compatible with TAPI 2.1. Since
NCS Ware implements its service provider based on TAPI 2.1, applications
written to TAPI 3.0 can make full use of all the telephony functions
implemented by NCS Ware.
NEC's TAPI Implementation
In earlier versions, NEC implemented a TAPI Service Provider (TSP) only
and relied completely on Microsoft's middleware to support clients running
over a network. However, Microsoft's support for remote clients required
that the installation have a complete NT server environment including
domains and directory. It required the client systems to belong to the same
NT domain, the remote user to have an account on the NT domain, etc.
Overall, installing, maintaining and supporting a TAPI-based application
resulted in a lot of work and hence made it a very expensive solution.
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NEC's TAPI Implementation
In NCS Ware 4.0, NEC has implemented an innovative solution to
overcome the problems mentioned above. The new solution does not rely
on Microsoft's middleware to support remote clients and implements that
functionality by itself using TCP/IP. This new architecture is depicted in
Fig. 2
TAPI
Figure 2. NEC’s TAPI Implementation
TAPI Gateway consists of two components:
1.
TAPI Proxy Server
- this component should be installed on the NCS
Serv system and this component actually implements all the TSP
functionality by communicating with the NCS Serv software
components. It runs as an NT service.
2.
TAPI Service Provider
(TSP) - this component should be installed on
each client system that intends to use a TAPI application.
These two components communicate with each other using NEC's own
TCP/IP based protocol called NCS LinkPlus. Since there is no requirement
other than that the client and the server systems should have a TCP/IP
connection, the installation, maintenance and support for TAPI
applications should be very easy and straightforward.
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Using TAPI with NCS Ware 4.0
As is evident from Fig. 2, when a client application registers with TAPI for
controlling a telephony device such as an extension, NCS Serv will send all
events happening on that device to the TAPI proxy, which will, in turn send
the events to the client system's service provider. The service provider will
report these events to the TAPI middleware on the client system and TAPI
will report them to the client application. Similarly, when the client
application sends a command to TAPI, it is transported all the way to the
NCS Ware system software and the results are sent back via the same
components.
The important point to note is that all the communication that goes on
below the TAPI layer on the client system is transparent to the application
itself. Thus, the support for TAPI applications has been greatly simplified
in NCS Ware 4.0.
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System Requirements
System Requirements
In order to use TAPI applications such as Microsoft Outlook , Act 2000 or
Goldmine successfully, your environment has to meet certain
requirements. These requirements are given below for your reference.
Before implementing TAPI in an environment, you should make sure these
requirements are met and also make sure you understand the restrictions
and exceptions to the TAPI support in NCS Ware 4.0 as outlined on page 8.
Server Requirements
The server system (NCS Serv system) should meet the following
requirements to support TAPI:
• Windows NT Server 4.0 with Service Pack 6a or Windows 2000
Server
• NEC telephony boards (Quantum and/or Triton boards)
• Sufficient memory for your configuration as indicated in NCS Ware
Installation Manual
• Network connection with TCP/IP enabled
• Center (Option Pack) license
• One session license for each concurrent TAPI client connection
• NEC TAPI Proxy Server 4.0 software
TAPI
Client Requirements
The client system should meet the following requirements to support TAPI:
• Windows 98, Windows NT 4.0 with SP 6a or Windows 2000
• Network connection with TCP/IP enabled
• NEC TAPI Service Provider 4.0 software
• A TAPI application (Phone Dialer, Outlook, etc.)
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Using TAPI with NCS Ware 4.0
Server Installation
Before you install the client software (TAPI SP), you should prepare the
server system. The first step in preparing the server system is to install and
configure the NCS Ware software. For more details on this step, refer to
NCS Serv Getting Started Manual. Once you have installed the telephony
hardware, installed the NCS Ware software and configured it, test the
system by making a few calls into and out of the system and make sure it
works as expected.
Then, install the TAPI Proxy Server software. This software can be found
in the NCS Ware 4.0 CD and also in the Center 4.0 CD. Run the
SETUP.EXE file from the TAPIGateway\TAPIServer folder. Remember
that you should be logged in as a user that has Administrator privileges to
install the software properly.
Once you install this server component, the service is started automatically.
No configuration parameters need to be set on the server.
Client Installation
Before you begin client installation, make sure that the client system meets
all the requirements listed on page 5. Then, check that the server
installation is complete. You should also note the name or the IP address of
the server.
From the TAPIGateway\TAPIClient folder in the NCS Ware or Center 4.0
CD, run the SETUP.EXE file. This will launch the setup wizard that will
walk you through the installation process. During installation, you will be
asked for the following information:
•
Server IP address
system to which your extension belongs
•
Extension Number
•
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TAPI
Password
- enter your NCS Serv extension's password
4.0 User Guide
- enter the name or the IP address of the NCS Serv
- enter your extension number
Client Installation
Now, you are ready to use TAPI application from your client PC. To test
your client installation, launch
Start=>Programs=>Accessories.
Dial
box and then click on
Phone Dialer
from
Enter a number to call in the
Dial
button. If the installation is correct, your
Number to
extension should ring and once you pick up the telephone handset, the
system will dial the number you entered and you will be connected to that
number.
If it does not work or if you need to change any of your configuration
parameters,
• Go to
• Click on the
• You should see an entry called
Start=>Settings=>Control Panel=>Telephony
Windows 2000, go to
and Phone Options
Telephony Drivers
click on the
Advanced
Start=>Settings=>Control Panel=>Modem
)
tab. (In the case of Windows 2000,
tab)
Communications Service Provider
Choose this entry and click on the
Configure
. (In the case of
.
button.
• You will get a dialog box with an entry for your extension. Select that
entry, and click on the
Configure
button.
• You will now see a dialog that displays all of the detected devices
from NCS Serv. Click on the
Configure
button. You will get a dialog
box with an entry for your extension.
• To change any parameters, you should delete this entry and create a
new entry with the new values.
• To delete an entry, click on the
Extension
button. In the new dialog
box, enter the extension number and password of the entry you want
to delete and click on the
• To add an entry, click on the
Delete
Extension
button.
button. In the new dialog box,
enter the extension number and password of the entry you want to add
and click on the
Add
button.
TAPI
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Using TAPI with NCS Ware 4.0
Restrictions and Exceptions
In NCS Ware 4.0,
TAPI gateway. With this support, a client application can make outbound
calls from an extension.
TAPI call control functions such as transfer, hold, park, etc. are
supported in NCS Ware 4.0.
only
outbound dialing functions are supported in the
not
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4.0 User Guide
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