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Chapter 3

Call Control

3.1 Introduction
3.1.1 Call Control and Protocol-Independence
3.2 Telephone Network Events
3.2.1 Informational Events
3.2.2 Transitional Events
3.3 Responding to Inbound Calls
3.3.1 Inbound Call Parameters
3.3.2 Inbound Call Events
3.3.3 Retrieving Incoming Call Information
3.4 Establishing Outbound Calls
3.4.1 Call Control Mask Parameters
3.4.2 Connectmask
3.4.3 Disconnectmask
3.4.4 Using Telephone Network Tone Detection
3.4.5 Using Precise Tone Detection
3.4.6 Using Broadband Tone Detection
3.4.7 Using Voice Detection
3.4.8 Using Call Placement Timeout
3.4.9 Outbound Call Parameters
3.4.10 Outbound Call Events
3.5 Releasing Calls
3.5.1 Telephone-Network-Initiated Release
3.5.2 Application-Initiated Release
3.5.3 Call Release Parameters
3.5.4 Call Release Events
3.6 Blocking and Unblocking Calls
3.6.1 Call Blocking Parameters
3.6.2 Call Blocking Events
3.7 Managing Service Interruption
3.8 Transferring Calls
3.8.1 Using Supervised Transfer
3.8.2 Using Blind Transfer
3.8.3 Call Transfer Parameters
3.8.4 Call Transfer Events
3.9 Comprehensive State Diagrams
3.10 Protocol-Specific Parameters
3.10.1 Loop-Start Parameters
3.10.2 Wink-Start and DID Parameters
3.11 System Restrictions

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