Just a quick one - I'm looking at the list of GSM supported modems - specifically the Itegno 3000. According to Itegno's web-page this modem connects via USB.... however Opmanager insists that GSM modems be connected up via serial port. I would actually like to hook up a GSM modem via USB so can the Itegno 3000 be used via USB or not? Anyone with any experience of this?