INTERNATIONAL  TELECOMMUNICATION  UNION

		      ITU-T RECOMMENDATION SUMMARY


Rec. No. : D.232

Title :	Specific tariff and accounting principles applicable to ISDN 
	supplementary services

Study Group : III - Tariff and Accounting Principles

Version : Revised

Date of adoption : 1992

Notes :	


General charging and accounting principles for ISDN supplementary 
services may be found in Recommendation D.230. This Recommendation 
indicates the application of the general principles to each ISDN 
supplementary service. The supplementary services are placed in 
logical groupings where they share similar considerations and 
charging principles. Annex A of this Recommendation summarizes the 
charging mechanisms and support requirements.

Recommendation D.232 sets out the charging principles for number 
identification, Direct Dialling-In and Multiple Subscriber Number, 
Call Forward and Call Transfer, Line Hunting, Call Waiting and Call 
Hold, Conference, Closed User Group, Advice of Charge, Priority and 
Multi-level Precedence and Preemption supplementary services.



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