The methods used to pass on urgent messages or warn people of danger have evolved greatly from the days of sending runners. For instance, a story is told of a Greek long distance runner, Pheidippides, who ran two hundred and forty kilometers in two days to ask for help to repulse Persian invaders. For more modern emergency communication equipment Pennsylvania has a large number of suppliers.
Such devices have to meet a number of criteria. The first is that they must be highly reliable; failure is not an option in the middle of a crisis. Had the modern Athens Marathon commemorates the run of the soldier failed, Persians would have overrun Athens. They must also be secure; it would not do to find some parts of the apparatus stolen, or for a person with ill intent to sabotage it. For instance, it was extremely critical that hero of Ancient Greece stay out of enemy hands.
Had he been captured, the information may have been extracted from him, or he could have been killed. Either way, the message he was sent to deliver wouldn't have gotten through, and the Athenian's goose would have been cooked. Paradoxically, they must be easily accessible too, at least to authorized personnel. Finally, they must be able to get the message through quickly to the intended recipients.
Pheidippides was successful on all points, making him a valuable messenger. Unfortunately, he did not live long after delivering his message. When Spartans defeated the Persians, he ran another forty kilometers to Athens, where he died after delivering the good news of victory.
These devices can be classed into two categories. The first is those designed to deliver messages to individual points, such as mobile phones, walkie talkies, among others. The second is those meant to deliver messages to a large number of people at once, such as public address systems, digital signage and so on. Devices meant to pass messages to the public must be able to get through to as many as possible at the same time.
Seen from this paradigm, the devices include light emitting diodes signs. These are excellent for delivering messages to large numbers of people, and can augment audio speakers. This is important if there are hearing impaired people who need to get the message, or in the cases such as explosions, people are rendered deaf temporarily.
Digital signage are similar in function to light emitting diode signs, but are able to display more complex messages which may include video. Audio public address systems, which include giant voice systems, are excellent for delivery of messages over a large area. They have several weaknesses; it may be impossible to reach the deaf, storms and other environmental noises may make the message impossible to hear, and so on.
Some popular methods of exchanging information, such as calling and writing texts have proved unreliable in crises; almost all networks lack the capacity to handle massive peaks in demand. Online platforms and social media may actually be more reliable, and have proven their worth during many disasters. Battery power for the devices needed to post messages may be one limiting factor. For anyone who needs advice on emergency communication equipment Pennsylvania has a large number of people that are willing to help.
Such devices have to meet a number of criteria. The first is that they must be highly reliable; failure is not an option in the middle of a crisis. Had the modern Athens Marathon commemorates the run of the soldier failed, Persians would have overrun Athens. They must also be secure; it would not do to find some parts of the apparatus stolen, or for a person with ill intent to sabotage it. For instance, it was extremely critical that hero of Ancient Greece stay out of enemy hands.
Had he been captured, the information may have been extracted from him, or he could have been killed. Either way, the message he was sent to deliver wouldn't have gotten through, and the Athenian's goose would have been cooked. Paradoxically, they must be easily accessible too, at least to authorized personnel. Finally, they must be able to get the message through quickly to the intended recipients.
Pheidippides was successful on all points, making him a valuable messenger. Unfortunately, he did not live long after delivering his message. When Spartans defeated the Persians, he ran another forty kilometers to Athens, where he died after delivering the good news of victory.
These devices can be classed into two categories. The first is those designed to deliver messages to individual points, such as mobile phones, walkie talkies, among others. The second is those meant to deliver messages to a large number of people at once, such as public address systems, digital signage and so on. Devices meant to pass messages to the public must be able to get through to as many as possible at the same time.
Seen from this paradigm, the devices include light emitting diodes signs. These are excellent for delivering messages to large numbers of people, and can augment audio speakers. This is important if there are hearing impaired people who need to get the message, or in the cases such as explosions, people are rendered deaf temporarily.
Digital signage are similar in function to light emitting diode signs, but are able to display more complex messages which may include video. Audio public address systems, which include giant voice systems, are excellent for delivery of messages over a large area. They have several weaknesses; it may be impossible to reach the deaf, storms and other environmental noises may make the message impossible to hear, and so on.
Some popular methods of exchanging information, such as calling and writing texts have proved unreliable in crises; almost all networks lack the capacity to handle massive peaks in demand. Online platforms and social media may actually be more reliable, and have proven their worth during many disasters. Battery power for the devices needed to post messages may be one limiting factor. For anyone who needs advice on emergency communication equipment Pennsylvania has a large number of people that are willing to help.
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