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Message: <blockquote data-quote="eeshaw" data-source="post: 479940" data-attributes="member: 25150"><p>Satellite phones is another option although not readily available.  Semi four was mentioned, there's also Morse if lines are still intact.  The bad thing is that it's not so much a way to communicate as it is people that know how to interpret signals.  Short range you could use a drum, bells, or anything that makes noise.  Even the native peoples had ways to communicate over long distance using smoke.  If needed at night time you could use anything that emits light although it would be limited by atmospheric conditions.  It's going to depend a lot on how much information needs to be shared and over what distance.</p></blockquote><p></p>