| http://www.w3.org/ns/prov#value | - (a) a PSTN switch associated with the telecommunications network; (b) a gateway associated with the switch; (c) a central server connected to the gateway, comprising: (i) means for storing messages, (ii) means for storing call handling instructions, (iii) means for providing user authentication, and (iv) means for providing call control; (d) a plurality of devices including telephones and Internet
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