Voice Operations and Fax Numbers | DCP‑T530DW | DCP‑T535DW | DCP‑T536DW | DCP‑T730DW | DCP‑T735DW | DCP‑T830DW | DCP‑T835DW | MFC‑T580DW | MFC‑T780DW | MFC‑T930DW | MFC‑T935DW