please define pstn and access network and draw the schematic diagram also explain complete procedure the two customers call to each other both belong to LATA?
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The public switched telephone network (PSTN) is the aggregate of the world's circuit-switched ... Alerting another user of the desire to establish a telephone call was ... also private networks run by large companies which are linked to the PSTN only ... Within the access network, there are a number of reference points defined.
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