origination
calls that originate in the PSTN public switched telephone network and are carried to their destination over the Internet
en-US/ɚˌɪd͡ʒəˈneɪʃən/
en-GB/əˌɹɪd͡ʒɪˈneɪʃən/
calls that originate in the PSTN public switched telephone network and are carried to their destination over the Internet