Today, we’re continuing to look at communications devices in this communications overview section of the article. So far, we’ve look at Ham radio/licensed devices, but now we’re moving into non-FCC license dependence communication devices to consider.
Cell Phones – Using During An Emergency and Improving Reception
During an emergency it is very common that the local cell phone towers become saturated. Many people attempt to connect at the same time, resulting in busy signals. In addition, some cell towers have special equipment that restrict public use and dedicate additional bandwidth to emergency services. This section covers how to get a message out, as long as the cell tower is working.
SMS Texts
SMS texts (aka messages on an iPhone) use an alternate channel on cell phone towers called a control channel. This control channel is isolated from voice and data channels and is not impacted when too many voice and data connections are made. SMS also caches the message on your device and makes several attempts to deliver it, which is very useful if service is intermittent.
Continue reading“Radio Communication Methods During Emergencies- Part 2, by R. in NC”