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ITU-T Q Supplement 52 NNI mobility management requirements for systems beyond IMT-2000
ITU-T Q Supplement 51 Signalling requirements for IP-QoS
ITU-T Q.1980.1 The Narrowband Signalling Syntax (NSS) - Syntax definition
ITU-T Y.2001 General overview of NGN
ITU-T K.54 Conducted immunity test method and level at fundamental power frequencies
ITU-T T Supplement 1 Conformance testing requirements for Recommendations of the T.170-series
ITU-T T.170 Supplement 1 Conformance testing requirements for Recommendations of the T.170-series
ITU-T E.121 Erratum 1 Pictograms, symbols and icons to assist users of the telephone services, Erratum 1
ITU-T Q.827.1 Requirements and analysis for the common management functions of NMS-EMS interfaces
ITU-T Y.2011 General principles and general reference model for Next Generation Networks
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