ðə dᵻɹˈɛktɚ tˈɛlᵻfˌoʊn sˈɪstəm wʌz dɪvˈɛləpt sˌoʊ ðæt səbskɹˈaɪbɚz ɪn lˈʌndən kʊd kˈɔːl wˈʌn ɐnˈʌðɚɹ ɪn ɐ lˈɪŋkt nˈʌmbɚɹɪŋ skˈiːm ɹᵻɡˈɑːɹdləs ʌv wˈɛðɚ ðeɪ wɜːɹ ˌɔn ɐ mˈænjuːəl lˈoʊkəl ɛkstʃˈeɪndʒ ɔːɹ ɐn ˌɔːɾəmˈæɾɪk wˌʌn.
The Director telephone system was developed so that subscribers in London could call one another in a linked numbering scheme regardless of whether they were on a manual local exchange or an automatic one.