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Global Call API for HMP on Windows Programming Guide — August 2006 53
Call State Models
• Call Dialing
• Call Proceeding
• Call Alerting
• Call Connected
• Overlap Sending (for E1, T1, and ISDN technologies only)
• Call Failure
• Outbound Call Scenarios in Asynchronous Mode
3.4.2.1 Outbound Calls in Asynchronous Mode Overview
Figure 11 illustrates a basic Outbound Call Model, which shows the call states associated with
establishing a call in the asynchronous mode. All calls start from a Null state. The call
establishment process for outbound calls is shown. Table 7 presents a summary of the outbound
call state transitions.