Welltech Dialogic SS7 Protocols ISUP - Manual (Page 42)

Section 6 Interface to Application
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The following optional parameters are supported in ANSI mode only:
• Business group
• Generic digits
• Information indicators
• Network transport
• Notification indicator
• Redirection information
6.5.22 Progress Request
This primitive is used by the application to convey information about the
progress of the call.
Message type
CPG (Call Progress Message)
Mandatory parameters
• Event information
Optional parameters
• Access transport
• Automatic Congestion Level
• Backward call indicators
• Cause indicators
• Call reference
• Optional backward call indicators
• Redirection number
• Remote operations
• Service activation
• Transmission medium used
• User to user indicators
May be used to accept user to user information service 1, 2 or 3
• User to user information
Discarded if user to user service 1 has not been accepted
The following optional parameters are supported in ITU-T mode only:
• Access delivery information
• Application transport
• Backward GVNS
• Call diversion information