130 Chapter 6 Networked TAPI/IVR213346.02• Meridian Link Services provides the call progress information that isnecessary to track calls and gather call information.The IVR system connects directly to the Succession switch to provide caller inputservices. The system is connected to an isolated C-LAN, which allows packet datatransfer with Symposium TAPI SP and SCCS / SECC.Symposium TAPI SP IVR driverWhen you install the IVR and networking option of Symposium TAPI SP, theIVR driver is installed. The driver provides call data support for inbound callstransferred from IVR ports that are controlled by an IVR system and aremonitored by Symposium TAPI SP.In a networked TAPI environment, the IVR driver also provides network call datasupport for calls overflowed from a remote Succession switch. When calls areoverflowed, the IVR driver requests call data from the IVR driver on the remoteTAPI server. The IVR driver uses the TCP/IP protocol to communicates with theIVR system and with networked TAPI servers.IVR-CTI messagesIVR-CTI integration occurs through the exchange of a series of messages betweenthe IVR system and the Symposium TAPI SP IVR driver. In a networked TAPIenvironment these messages are relayed by the main TAPI server to remote TAPIservers. The different message types are:• A registration message is sent by the IVR system to the Symposium TAPIIVR driver when a call arrives on an IVR port. The registration messageopens a connection to the IVR driver, which remains open until adisconnection message is sent.• A caller data message is sent by the IVR system to the IVR driver containingCED received by the IVR system.• A disconnect message is sent by the IVR system to the IVR driver when IVRtreatment for a call is complete.• An unsolicited status message is sent by the IVR driver to the IVR system ifany of the ports specified in the registration message cannot be monitored.
