The Dkt Tspi Call State Flow; System Messages - Toshiba strata CT Installation & Maintenance Manual

Computer Telephony Integration

The DKT TSPI Call State Flow

The Call State Flow diagram for the Toshiba TAPI Service Provider V2.36 or above is shown
in Figure 9-11
Figure 9-11
H

System Messages

An application receives information in two ways; solicited and unsolicited. Solicited
information is requested by the application through a function call such as lineGetDevCaps or
lineGetAddressCaps. Unsolicited information arrives in the form of messages. Often, the
two mechanisms are used together, as when application receives a LINE_CALLSTATE
C
message, after which it checks the information contained in the LINECALLINFO structure
by calling lineGetCallInfo.
Strata DKT TSPI supports the following messages providing unsolicited information.
LINE_CALL STATE
Sent to an application to notify it about changes in a call's state.
LINE_LINEDEVSTATE
Sent to the application to notify it about changes in the line status. This message indicates
which status item has changed.
LINE_ADDRESSSTATE
The Service Provider follows with this call-back message giving changes to the state of any
address.
LINE_CALLINFO
A call-back message that notifies of additional information about the call.
9-10
below.
Call State Flow
Strata CT I&M Manual October 2000