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SMS over PSTN Phone Lines (Endorsed by Texecom Ltd)

        Vodafone the last man standing? SMS over PSTN phone lines has been used in varying industries for many years and was often sold as an additional service by alarm companies, allowing the user to be notified of alarm conditions and open/close events. For many years there were two main players operating the service in the UK, O2 and Vodafone. In 2012 the ...
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