Paper titled: Challenges of Optimizing Common Alerting Protocol (CAP) for SMS based GSM Devices in Last-Mile Hazard Warnings in Sri Lanka (authors N. Waidyanatha – LIRNEasia, D. Dias – University of Moratuwa, and H. Purasinghe – Microimage) was presented at the 19th Meeting of the Wireless World Research Forum (WWRF), in Chennai, India, 5-7 November, 2007. The paper was discussed in Working Group 1 – Human Perspective and Service Concepts (WG1).