Yon gwo revey se tipikman yon sel, de, twa, oswa kat revey kom yon seri, ki chita sou yon ekstansyon anwo nan yon bilding. Anpil revey gwo kay won yo sitiye sou bilding men yo ka jwenn tou sou gwo fo tou won gratis-kanpe oswa estrikti, tankou gwo fo tou won telefon selile. Gwo kay won yo se gwo, revey eksterye, avek oswa san yo pa ileminasyon. Revey yo ka kouri pa mouvman endepandan oswa santral. Yon fwa ke gwo kay won mekanik mouvman yo te supersed pa antretyen moden gratis mouvman revey elektrik ak contrleur ki asosye yo elektwonik.
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