addressing, communicating (with), getting, reaching

getting through (to)acquainting, advising, apprising, briefing, clueing(or cluing), enlightening, familiarizing, filling in, informing, instructing, notifying, telling, wising (up)buzzing, calling, phoning, ringing (up)(chiefly British), telephoningkeeping up (with)

getting hold of, getting in touch with(or keeping in touch with), touching base (with)