1、Union internationale des tlcommunications Place des Nations 1211 GENEVE 20 Suisse Switzerland Suiza 瑞士 COVERING NOTE GENERAL SECRETARIAT OF THE INTERNATIONAL TELECOMMUNICATION UNION Geneva, 7 March 2007 ITU TELECOMMUNICATION STANDARDIZATION SECTOR Subject: Erratum 1 (03/2007) to ITU-T Recommendation
2、 Y.2271 (09/2006), Call server based PSTN/ISDN emulation 1) Correct Clause II.1.3 by replacing ABG by ABGBin the text and the figure: II.1.3 Scenario 3, single ACS and a single ABG Call between two CS-PES users belonging to the same ACS. AGAis connected to ACS and AGBis connected to ACS through ABGB.Figure II.3/Y.2271 Intra CS-PES call scenario 3
