Welltech Dialogic SS7 Protocols ISUP - Manual (Page 33)

Dialogic ® SS7 Protocols ISUP Programmer's Manual Issue 15
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6.5.8 End-to-End Message Request
This primitive is used by the application for end-to-end signaling.
Message type
PAM (Pass Along Message)
Mandatory parameters
• Message data
Optional parameters
None
6.5.9 Exit Request
Note: This message is only applicable to ANSI operation
An Exit Message may be sent in the backward direction from a gateway
exchange before Address Complete to indicate that call setup information has
successfully been passed to an adjacent network. This message may be
issued by the application for an incoming call in the waiting ACM state and
will only be accepted if the ISPGOP_ANSI circuit group option is selected.
Message type
CPG (Call Progress Message)
Mandatory parameters
• Event information
Must be coded as value 0x7d (defined as ‘spare’ by ANSI T1.113.3), to
indicate Exit.
Optional parameters
• Outgoing trunk group number
6.5.10 Facility Request
This primitive is used by the application to request activation of a particular
facility or action at another exchange.
Two forms of this primitive are supported. FAR is used to request a particular
facility during the active (speech) phase of a call, and FAC is used during
either the setup or active phase of a call to request a particular action at
another exchange.
Facility Request
Message type
FAR (Facility Request Message)