A Rockblock (Iridium 9602, see http://www.rock7mobile.com/products-rockblock) is probably the best thing to use. There might be one of these spare in the department, look in Mark Neal's storeroom/extra office. This will need to be connected to a serial port on the Arduino, software serial may have issues. The rockblock needs a 5V power supply, but uses 3.3V I/O.
A Rockblock (Iridium 9602, see http://www.rock7mobile.com/products-rockblock) is probably the best thing to use. There might be one of these spare in the department, look in Mark Neal's storeroom/extra office. This will need to be connected to a serial port on the Arduino, software serial may have issues. The rockblock needs a 5V power supply, but uses 3.3V I/O.