Chapter 6 Networked TAPI/IVR 131Network Managers Guide for Symposium TAPI Service Provider for Succession, release 3.0• A request call data message is sent by the receiving IVR driver to a remoteIVR driver if a call is overflowed from one site to another in a networkedTAPI environment. If this message does not include a network CLID, thereceiving IVR driver searches for the network CLID in its IVR serverdatabase table in order to respond.• A caller info data message is sent by the remote IVR driver to the receivingIVR driver in response to a request call data message in a networked TAPIenvironment.Network call dataNortel Networks recommends that the IVR system is centralized at the main sitein a networked environment. To receive IVR treatment, all incoming calls arerouted into the Succession switch at the main site. The IVR system passes theCLID and CED to the central Symposium TAPI SP IVR driver which stores thisinformation.When a call is routed to a remote site, the TAPI server at that site extracts theHLOC from the network CLID. It checks if this HLOC is in its IVR host databasetable, and sends a request call data message over TCP/IP to the TAPI server at themain site. The main TAPI server then sends a caller data message to the remoteTAPI server. All TAPI servers must be configured with the IP address and HLOCof the main TAPI server. These common configurations ensure that when a callarrives into a remote site, the remote TAPI server can match the HLOC containedin the network CLID with the HLOC for the main TAPI server stored in its IVRhost database table.There are two ways of attaching data from the IVR system to TAPI:• If call data is associated with a network CLID, Symposium TAPI SP does notmonitor the incoming IVR port.• If call data is associated with a specific DN port, Symposium TAPI SP mustmonitor the incoming IVR port.For information about configuring and maintaining the IVR host database tablerefer to “Configuring the network TAPI/IVR table” on page 104.The Symposium TAPI SP IVR driver performs the following tasks:• monitors IVR DNs and records associated network CLIDs
