Whats the difference between First Party Tapi and Third Party Tapi?
First Party Tapi – This involves a direct physical connection between the workstation computer and the telephony device. A driver (called a TSP) needs to be installed and configured on the workstation. This connection carries information about the status of the handset and call related information such as CallerID (CLI / ANI) and DDI (MSN / DNIS) from the telephony device to the workstation and commands such as dial and hang up from the workstation to the telephony device. This is usually a serial cable connected to the handset but can also be a PC expansion card, USB or IP connection or a virtual phone. The advantage of First Party Tapi is that you can enable a small number of users with an independent cost and therefore Tapi can be implemented as budgets permit and as returns on initial investment have been proven. First Party Tapi also has the advantage that should the hardware fail, only one workstation will be affected. Third Party Tapi – This involves a logical network connection
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