Dialogic 6.2 manual Backward Channel, November 350

Enabling the R2 Protocol

Table 21. IISDN_R2MFC_FORWARD_ACTIONS (Continued)

Name	Description	State
PROCESS_CONGESTION_SIGNAL	Process congestion signal.	DNIS or
		ANI
PROCESS_NEXT_ANI_DIGIT_REQUEST	Process request for next	ANI
	ANI digit.
PROCESS_CALLING_PARTY_CATEGORY_	Process request for	DNIS
REQUEST	calling party (ANI)
	information.
PROCESS_CALL_ACCEPTED_NO_GROUP_B	Process call accepted	DNIS
	without need for Group B
	line condition.
PROCESS_NATURE_OF_CIRCUIT_QUERY	Process request for circuit	DNIS
	nature.
PROCESS_ECHO_SUPPRESSOR_QUERY	Process request for use of	DNIS
	echo suppressor.
PROCESS_GROUP_B_LINE_CONDITION	Process received	Line
	(Group B) called line	condition
	condition.

Backward Channel

Table 19 identifies the set of backward inter-register signals. The tones defined are those used to support DNIS and ANI services appropriate for customer premise equipment. Not all tones that are possible under the ITU recommendations are required nor implemented at this time. Certain tones might not be defined in a particular variant. In such a case, the values of those tones should be set to R2B_INVALID. In addition, certain signals are normally expected to have the same absolute signal code whether the forward channel is in state DNIS or state ANI. For example, this is true for the congestion signal. However, distinct definitions are provided in these cases to allow customization for an arbitrary variant.

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