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Beginners: Pagers - How and Why

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A short presentation and video looking at Pagers and why they are still being used. Pagers have been made popular recently by Avengers, Tron and other. In this introductory tutorial we will see different types of pagers, how pagers work and some of the issues associated with them

Publié dans : Technologie
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Beginners: Pagers - How and Why

  1. 1. Pagers: How and Why @3g4gUK
  2. 2. Paging… ©3G4G • Pagers (a.k.a. Beepers) are back in the news thanks to Hollywood
  3. 3. Avengers: Nick Fury Pages Captain Marvel ©3G4G Source Clip
  4. 4. TRON: LEGACY – Alan receives a Page ©3G4G Source Clip
  5. 5. Paging… ©3G4G • Pagers (a.k.a. Beepers) are back in the news thanks to Hollywood • The first pager was introduced back in the 1950’s. It wasn’t even referred to as a Pager until Motorola coined the term "pager" in 1959. The company introduced its first commercial pager in 1974.
  6. 6. Pager (Walkie Talkie) News from 1956 ©3G4G Source: YouTube
  7. 7. Paging… ©3G4G • Pagers (a.k.a. Beepers) are back in the news thanks to Hollywood • The first page was introduced back in the 1950’s. It wasn’t even referred to as a Pager until Motorola coined the term "pager" in 1959. The company introduced its first commercial pager in 1974. • In the last few years, companies running Paging services are starting to switch off the network and start moving the users to other systems like Mobile phones.
  8. 8. The two types of Pagers in the clips ©3G4G • The Pager used in Tron is a standard one-way pager that we will look at more in detail • The one used in Avengers is not a standard Pager. On the Avenger fan pages, it is said to be Quantum Pager as Captain Marvel may be in the Quantum realm or a different timeline. • It would be difficult for us to explain this kind of pager in this tutorial 😉
  9. 9. So how do Pagers work ©3G4G • It works by Broadcasting, the same way as TV and Radio. • Every Pager is assigned a personal code number or phone number and anyone who wants to send a message to this number dials or quotes that number with the message they want to send. • This message is sent to switchboard and from there it is sent to everyone • All Pagers receive the message but ignore any messages that do not have their personal code or phone number
  10. 10. What is a ‘Page’ ©3G4G • A page is simply the message or alert sent to or received by a pager • The Beepers or tone-only pagers will just receive an alert and then have to contact the operator or switchboard • These kinds of pagers are used widely in restaurants
  11. 11. ‘Beepers’ or ‘Tone-only’ Pagers ©3G4G Source clip
  12. 12. What is a ‘Page’ ©3G4G • A page is simply the message or alert sent to or received by a pager • The Beepers or tone-only pagers will just receive an alert and then have to contact the operator or switchboard • These kinds of pagers are used widely in restaurants • In old days, Numeric pagers were popular but with the evolution of technology, nearly everyone moved to Alphanumeric pagers
  13. 13. Motorola Bravo Numeric Pager (1986) It soon becomes the world's best-selling paging device. Read more about this pager here. ©3G4G
  14. 14. What is a ‘Page’ ©3G4G • A page is simply the message or alert sent to or received by a pager • The Beepers or tone-only pagers will just receive an alert and then have to contact the operator or switchboard • These kinds of pagers are used widely in restaurants • In old days, Numeric pagers were popular but with the evolution of technology, nearly everyone moved to Alphanumeric pagers • Finally, In case of Alphanumeric pagers, the message follows the Page part and is received on the Pager along with the Page.
  15. 15. Alphanumeric Pagers Examples ©3G4G
  16. 16. Two-way Pagers ©3G4G • In 1995, Motorola introduced the first two-way pager called Tango • It was not well received as it could only respond with 16 canned answers • In 1996, Skytel announced a pager (SkyWriter) that can send and receive emails. • The problem with SkyWriter was that the text had to be pecked out on a tiny keyboard laid out on its screen • In the same year, Research In Motion quietly brought out the "Inter@ctive Pager." It differs from the SkyWriter by having an actual "qwerty" keyboard with little moving keys • This pager gave birth to Blackberry phones eventually
  17. 17. Two-way Pagers ©3G4G Motorola Tango (1995) Image source Skytel SkyWriter (1996) Image source RIM Inter@ctive Pager (1996) Image Source Motorola PageWriter 2000 (1997) Image Source
  18. 18. Types of Pages ©3G4G • There are two different kinds of paging: • Limited-range paging sends messages over a relatively small area using a low-powered transmitter. • It's perfect for sending emergency messages to all the doctors in a hospital, for example. • Wide-area paging sends page across a whole country in hopes that the Pager will be somewhere near one of them. • In the UK, for example, the wide-area paging network uses something like 500 transmitter antennas—more than enough to cover a country that size.
  19. 19. Are Pagers More Reliable than Mobiles? ©3G4G • The answer is Yes and No both. • Pagers use much lower frequencies than mobile systems hence the Page can be received in hard to reach location
  20. 20. Importance of Frequency selection ©3G4G 2.1GHz 900MHz Higher frequency means faster decay Lower frequency means more number of users in a given cell Higher frequency gets reflected from walls and have poor penetration Lower frequency gets attenuated from walls but still penetrates
  21. 21. Are Pagers More Reliable than Mobiles? ©3G4G • The answer is Yes and No both. • Pagers use much lower frequencies than mobile systems hence the Page can be received in hard to reach location • Paging system uses much higher power to transmit reliably • There are overlapping areas in paging coverage to make sure that the user is always in the coverage area
  22. 22. Problems with Pager Technology ©3G4G • They are not very secure as the messages are not encrypted • Anybody can create their own receiver that can receive anyone’s message • If for some reason the Pager is offline (for example switched off) than any Page sent during that time is lost and cannot be received after the Pager is back online • All Pages are the same priority, regardless if it was high or low priority • This can be an issue on a very busy day where loads of messages need to be sent.
  23. 23. Further Reading ©3G4G • Pager – Wikipedia • Pager – Explain That Stuff • History of Pagers and Beepers – ThoughtCo • NHS uses 10% of world's pagers at annual cost of £6.6m – The Guardian • Still buzzing: the people using pagers in 2017 – The Guardian
  24. 24. Thank You To learn more, visit: 3G4G Website – http://www.3g4g.co.uk/ 3G4G Blog – http://blog.3g4g.co.uk/ 3G4G Small Cells Blog – http://smallcells.3g4g.co.uk/ Operator Watch - http://operatorwatch.3g4g.co.uk/ Follow us on Twitter: https://twitter.com/3g4gUK Follow us on Facebook: https://www.facebook.com/3g4gUK/ Follow us on LinkedIn: https://www.linkedin.com/company/3g4g Follow us on SlideShare: https://www.slideshare.net/3G4GLtd Follow us on YouTube: https://www.youtube.com/3G4G5G ©3G4G

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