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Date: 2003-08-20 17:09:24Technology ITU-T Public switched telephone network Signaling International Telecommunication Union Telecommunication Telephony Disaster preparedness Telecommunications for Disaster Relief | International Telecommunication Union TDR Signalling InterfaceAdd to Reading ListSource URL: www.itu.intDownload Document from Source WebsiteFile Size: 76,89 KBShare Document on Facebook |