Dialogic 6.2 manual Forward Channel, IISDNR2MFCFORWARDACTIONS, November 349

Enabling the R2 Protocol

Forward Channel

The set of forward channel actions to backward channel signals is defined in Table 21.

Actions #2 - #8 might be used when processing DNIS or ANI digits according to a particular protocol variant. The processing changes state according to the current state and the particular event. For instance, when in the ANI state, if a backward signal event requires processing action PROCESS_NEXT_DNIS_DIGIT_REQUEST, then that action occurs with a return to the DNIS state. In certain protocol variants, a particular action might not be possible in a particular state. For instance, a particular China PRC variant uses R2B_01 to signal both the request for the next ANI digit and the request for the next DNIS digit. Since there is no other, DNIS related signal defined, the protocol cannot return to DNIS collection until all ANI digits have been delivered.

Table 21. IISDN_R2MFC_FORWARD_ACTIONS

Name	Description	State
PROCESS_INVALID_BACKWARD_SIGNAL	Process a backward	Any
	signal not defined; results
	in protocol termination.
PROCESS_NEXT_DNIS_DIGIT_REQUEST	Process request for next	DNIS or
	DNIS digit; if invoked	ANI
	from the ANI state, then
	a state change to DNIS
	occurs.
PROCESS_LAST_BUT_1_DNIS_DIGIT_REQUEST	Process request for N-1	DNIS or
	DNIS digit.	ANI
PROCESS_LAST_BUT_2_DNIS_DIGIT_REQUEST	Process request for N-2	DNIS or
	DNIS digit.	ANI
PROCESS_LAST_BUT_3_DNIS_DIGIT_REQUEST	Process request for N-3	DNIS or
	DNIS digit	ANI
PROCESS_RESTART_DNIS_REQUEST	Process request for DNIS	DNIS or
	restart.	ANI
PROCESS_CALL_COMPLETE_CHANGE_TO_	Send Group II call	DNIS or
GROUP_B	category and change to	ANI
	Group B reception.

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