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Operator Toll Dialing
Operator Toll Dialing
North American telephone switching technology
en-GB
/ˈɒpəˌɹeɪtə ˈtəʊl daɪəlɪŋ/
en-US
/ˈɑpəˌɹeɪdɚ ˈtoʊl ˈdaɪəlɪŋ/
Categories:
Long-distance calling