It's important to be familiar with the location of the payphones around your area. Cellular phones- cellular phones are now very common. Many people now use cell phones. Cell phones are excellent ECS tools. UCSD pagers can receive both numeric and alphanumeric messages.
Most pages can receive limited email messages making it a flexible tool for emergency communication.
With the explosion of the Internet, more and more people are now using electronic mail. Emails, as mentioned above, can also be used as an ECS provided the network is up and running. Additionally, more people now maintain their own web pages and use them to publish all sorts of information. Web pages are an excellent medium to publish emergency information. Data networks in general are becoming a more valuable resource, and the campus should take steps to ensure that they are as robust as possible.