Ringless Voicemail Drops are the newest technology in the industry and used to directly target cell phones, without ever ringing the phone. When provided with a call list, RoboCent will remove all the landline numbers, keeping just the cell phones. It works by establishing a server-to-server communication directly with the callees voicemail platform, circumventing the need to dial the recipient. A telephone call is never made to the cell phone, instead, using a drop delivery system.