TransTel TAPI Interface

TAPI Protocol
TAPI (Telephony Applications Programming Interface) is a protocol developed by Microsoft for use with its Windows operating system to enable integration between Windows applications and telephony devices. In this case we are talking about PBX equipment.

The protocol defines a list of commands that an application can issue to control the functions of the telephony device. Commands for making a call, holding a call, transfering a call, and ending a call, are basic. The protocol is of course much more extensive than that with some quite sophisticated functional control available to applications should it be required.

The TAPI protocol is standard and published so there are many Windows applications (software) that have been written for various purposes that use it. To use TAPI requires, at minimum, the installation of a TSP (Telephony Service Provider) driver on the PC, workstation, or server, running the TAPI enabled application, or server/client software set. The TSP is supplied by the telephony device manufacturer and is effectively a software driver that forms the interface between the manufacturers equipment protocols and the Microsoft Windows TAPI application programming interface (API).

TransTel TAPI Interface
The TransTel TDS series systems are TAPI enabled by virtue of the TransTel supplied software components “G2-TSP” and “T-Server”.

With TransTel G2-TSP and T-Server software installed on the relevant network computers, network connections to the subject TransTel system, and some configuration and program settings made, the TAPI functionality is provided.

There are two classes of this CTI integration known as First Party and Third Party. The difference is primarily in implementation and relates to the number of users. They both produce the same end user result such as the ability to “click to dial” from Outlook for example; or much more extensive functionality such as screen pops for incoming calls, and more, when used in conjunction with specific third party TAPI CTI applications.

First Party has a user's PC connected directly to the telephony device - for example to a TransTel TDS system via a LAN link. In this case there will be only one (concurrent) CTI user. For this concept only the TSP is required.

However the use of T-Server is recommended. Third Party has multiple users connected to a server which in turn is connected to the PBX - in the TransTel case the server will generally be T-Server running on a suitable PC which is then connected to the telephone system via a serial link or LAN cable dependent on which system is in use. The user PC's will usually also have the TSP installed.

There is some blurring of the above concepts however - dependant on the nature of the TAPI enabled CTI software application in use - there are application suites that employ their own server within the suite, and therefore service many users concurrently but still only use a First Party link between their server and the PBX. A more extensive explanation of the definition of First and Third Party is provided at the foot of this page.

Using TransTel TAPI - An Example :

“Click to Dial” From Microsoft Outlook

If you use a PC running Microsoft Windows 2000 or Windows XP operating system and use Microsoft Outlook you can “Click to Dial” your contacts direct from your Outlook Contact List right now on any TransTel TDS Series system.

Whether you are a single user, or your business has multiple concurrent users, all you need is the TransTel TSP installed on the user PC/s, TransTel T-Server installed on either your PC or other existing network PC, dependent on former or latter, some cabling links, and pertinent configuration settings made.

If your system is a TransTel TDS, its IP (LAN) connectivity means the T-Server PC can be anywhere on the network, with the advantage of greater speed for connections.

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