RF Telephone Pagers

From the telephone to the paging service

• standard POTs and DTMF touch tone encoding, or transcription by an operator

From a computer to the paging server:

• From a modem to an alphanumeric pager (to send text messages) IXO/TAP
  J. Brad Hicks (mc!Brad_Hicks@mhs.attmail.com) says:

  You will need two things:

  1. The phone number of the modem lines at your paging vendor. Keep pestering them until they let you talk to a real linesman or engineer; if they support text pagers, it's guaranteed that there is such a number.
     See also:
     • ~omegabyte/ List of Internet Paging Servers
  2. A piece of software that supports the IXO/TAP protocol. There are a number of IXO/TAP software packages on the market. If you want to write your own, the protocol specification is in the Telecom Archives as IXO.TAP.protocol (cached 990902), along with some example code in HyperTalk, ixo.example.

  • WinPage Lite (freeware)
  • ftp://ftp.simtel.net/pub/simtelnet/win95/telecomm/cpger201.zip

  Internet, from email, http/post

  • TPC.INT may also be offering a paging relay service
    • http://www-usa.tpc.int/rfc/rfc1703.txt
    • Example: to send a page to James Newton at E F Plus at the number, in  North America (where the country code is 1) of +1 619 652 0593 just email to: ~NOSPAM~pager-numericspam at spam16196520593.iddd.tpc.int with a numeric only message in the body of the email
  • Simple Network Paging Protocol - Version 3 - Two-Way Enhanced
  • http://thunder.cso.uiuc.edu/~gdf/epage.html - an example of an email to pager service at the University of Illinois
• from ASP pages
  • http://www.serverobjects.com/comp/AspPager.htm

From the paging server to the pager:

• the standard paging protocol is known as POCSAG.../pager/pocsag.txt

  Basicly paging transmissions consist of a preamble (512 alternating bits from memory) followed by a number of codewords which consists of 21 bits of data followed by 11 bits of CRC. Actual RF transmision is simple FM FSK. A 1 is FC +4.6Khz A 0 is FC -4.5Khz.

  See also:

  • http://www.ccc.de/Library/GCOM/POCSAG/POCSAG.html (in English via babelfish)
  • http://www.geocities.com/SiliconValley/Horizon/6063/rx-pager.zip RX-PAGER (40.246 bytes) Here you can find blueprints and software, that will allow you to build your home-made reciver to intercept and monitor messages from paging system. You simply connect it via RS232 port to any PC compatibile computer.
  • http://www.users.interport.net/~carlott/ A Pocsag encoder project utilizing a PIC16C84. (cached 990903)
  • Pager Hardware Reprogramming & Paging Protocols

• Motorola uses Flex
  • http://www.eavsdropper.dabsol.co.uk/SOFTWARE/SOURCE_CODE/source_code.html

Cell phones use SMSC

• It is actually easier to write a submit SMS handler and send the message via SMS itself rather than dial-up to the SMSC.

Research in motion has a great OEM pager board and it's communication protocol is only 1 or 2 kilobytes to implement.

www.precisesystems.com

Verimation Inc., Woodcliff Lake, NJ offers extended communication services for Telex, fax and pager.

InterResearch & Development Group announced iPost, a universal messaging system that allows users to securely retrieve and send messages via voice, fax, e-mail and pager from a central Web inbox.

Philips "Pager APPLICATIONS HANDBOOK" AN3B March 1995. Covers

• General intro
• Receivers
  • Antennas
  • VHF/UHF
  • UAA2080T receiver
• Decoders
• Development
  • tools and materials
  • rx design
  • decoder design
• Crystals and oscillators
• Other

Pager Codes

Questions:

• ~NOSPAM~vandijkenspam at spamhome.nl asks: " Does anybodu know how to program a UNIDEN ALP9080 pager ?" +
• Poul Holmø Thomsen of G&O Technologies AS asks: " Can anybody supply me with pic software for the STD-402 radio transceiver? BR PHT@g-o-tech.dk"

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