I am just opening up the discussion. I just came from a rural service where we had full time rigs that were staffed by one EMT-P and one EMT-I. We had volunteer rigs in the surrounding areas that were ILS or BLS depending on the responding staff. On the full time rigs the Intermediates attended every 911 call within their scope/ confidence level. This usually meant that the I's attended about 80% of the 911 calls. I receive patient in the ER from an urban EMS system and they only allow medics to attend 911 calls.