Digital Alert Systems TDX Textual Data eXchange protocol for adding information to standard EAS audio messages

Textual Data eXchange TDX is a Digital Alert Systems exclusive protocol for a text transmission technique providing event specific detail in the EAS message without obsoleting existing EAS equipment. TDX adds digital information within EAS alerts for interfacing to a host of newer information technologies and other TDX enabled devices. The TDX packet contains event specific data and/or pointer (i.e. hypertext) information directing decoders to event related data in an associated external database. Messages which include TDX pass transparently through regular EAS devices, while TDX enabled devices provide the additional data extraction.