{"id":"S85133287","label":"Telecommunication--Switching systems","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85133287","normalized_label":"telecommunication--switching systems","broader":["http://id.loc.gov/authorities/subjects/sh85035869","http://id.loc.gov/authorities/subjects/sh85042373","http://id.loc.gov/authorities/subjects/sh85131298","http://id.loc.gov/authorities/subjects/sh85131299"],"aliases":["Communication switching systems","Switching systems (Telecommunication)"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85133287","provider":"lcsh","revision":"aa37b89592fb5673","taxonomy_revision":"f050b5d4780b1289","title":"Telecommunication--Switching systems","url":"/topics/S85133287","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9514078513192650308","address_version":"morton4x16-v1","coordinates":[0,20,19487,39936],"answer_status":"Directory metadata; local answer requires separate source review","truth_status":"Subject descriptor, not a factual answer or a demonstrated knowledge gap","reviewed_answer":null}