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17、cense. ATIS-1000610.a.1998(R2013), Generic Procedures for the Control of ISDN Supplementary Services, Modifications to the Redirecting Number Information Element Is an American National Standard developed by the Signaling, Architecture, and Control (SAC) Subcommittee under the ATIS Packet Technologi
18、es and Systems Committee (PTSC). Published by Alliance for Telecommunications Industry Solutions 1200 G Street, NW, Suite 500 Washington, DC 20005 Copyright 2013 by Alliance for Telecommunications Industry Solutions Printed in the United States of America. All rights reserved. No part of this public
19、ation may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. For information contact ATIS at 202.628.6380. ATIS is online at . American National Standardfor Telecommunications Generic Procedures for the Control of ISDNSup
20、plementary Services, Modification to theRedirecting Number Information ElementANSI T1.610a-1998supplement to ANSI T1.610-1998Approved December 22, 1998 Secretariat: Alliance for Telecommunications Industry Solutions (ATIS)Page 1 of 3 pagesAn American National Standard implies a consensus of those su
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23、 and will in no circumstances give an interpretation of any AmericanNational Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in thename of the American National Standards Institute.CAUTION NOTICE: This American National Stan
24、dard may be revised or withdrawn at any time. The procedures of the American NationalStandards Institute require that action be taken to reaffirm, revise, or withdraw this standard no later than five years from the date ofapproval. Purchasers of American National Standards may receive current inform
25、ation on all standards by calling or writing the AmericanNational Standards Institute.Copyright 1999 by Alliance for Telecommunications Industry Solutions, 1200 G Street, NW, Suite 500, Washington, DC 20005ANSI T1.610a-19981 IntroductionThis supplement to American National Standard for Telecommunica
26、tions - Generic Procedures for the Control of ISDN Supplementary Services, ANSI T1.610-1998, revises the standard to improve and clarify the standard based on related advances in other standards bodies.2 Changes to Existing TextThe changes made to the existing ANSI T1.610-1990 are indicated below.1.
27、 In clause 2, replace the reference to ANSI T1.607-1990 and ANSI T1.607a-1996 with the following:ANSI T1.607-1998, Telecommunications - Integrated Services Digital Network (ISDN) - Layer 3 Sig-naling Specification for Circuit Switched Bearer Service for Digital Subscriber Signaling System Num-ber 1
28、(DSS1)ANSI T1.610a-1998Page 2 of 3 pages2. In clause 3, replace figure 8-12 with the following:Figure 8-12 - Redirecting number information element3. In clause 3, replace table 8-19 with the following two tables 18-19a and 18-19b:87654321OctesRedirecting number0111010 1Information element identifier
29、Length of redirecting number contents 20/1ext.Type of number Number plan identification 30/1ext.Presentationindicator0 0 0SpareScreeningindicator3a0/1ext.Coding standard for Reason for redirection0SpareReason for redirection 3b0 Number digits(ASCII characters)4etc.Table 8-19a - Coding standard for R
30、eason for RedirectionBits7 6Meaning0 0 CCITT standardized coding (Note 1)0 1 ISO/IEC standard (Note 2)1 0 National standard (Note 2)1 1 Standard defined for the network (either public or private) at the network side of the interface (Note 2)All other values are reservedNote 1 - This is the default c
31、oding for the field “Coding standard for Reason for redirection”.Note 2 - This coding standard may be used when the desired “Reason for redi-rection” coding cannot be represented with a CCITT standardized coding.ANSI T1.610a-1998Page 3 of 3 pagesTable 8-19b - Reason for Redirection codepointsBits4 3
32、 2 1Meaning0 0 0 0 Unknown0 0 0 1 call forwarding busy or called DTE busy (circuit-mode and packet-mode)0 0 1 0 call forwarding no reply (circuit-mode only)1 1 1 1 call forwarding unconditional or systematic call redirection (circuit-mode and packet-mode)1 1 1 1 call deflection or call forwarding by the called DTE (circuit-mode and packet-mode)All other values are reserved
