Scenario

A flood destroys the bridge to a village. The power and cell phones are down. Some houses tumble and some people are injured.

Actions and required technologies

Relief workers spread the boxes to form a mesh network from the relief center (RC) to the river side.	mesh network
A helicopter drops several porta-packs to the village along with some medicines and foods.
The chief picks up one porta-pack and makes a call to RC.	Voice over IP, one-key dialing to RC
The chief uses the webcam to shoot an injured person and send the picture to RC.	photo taking, photo transfer, photo server, photo display at RC
A doctor at RC instructs the chief on first aids with voice and text messages.	text message transport and display
RC broadcasts a warning about next flood. The people evades.	voice broadcasting, warning siren, text broadcasting
More villages are affected. Voice call seldom get through. The chief uses the phone to input resource requirements into RC's sahana server.	text input and sahana client
RC director decides how to distribute manpower and resources (tent, cloth, medicine, food, etc) based on information in sahana.	sahana server in local language
Villagers call their relatives with the porta-pack phone	VoIP bridge to PSTN or cell phone
The flood is gone.