| Signalling protocol mappings in support of the Emergency Telecommunications Service in IP networks | 
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                                This supplement provides guidance for mapping-required signalling protocol attributes to support the proper set-up and admission of ETS for various protocols. The set of protocols include ISDN user part (ISUP), session initiation protocol (SIP), ITU-T H.248, ITU-T H.225 and Diameter.  | 
                             
                         
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