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Pager: Messages
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Pager allows you to keep an eye on your website all the time without sitting around all day refreshing your browser. With Pager you can set how often to check your websites. Pager checks to make sure that these sites can be loaded, and reports to you when they can't. You can even use Pager to save a copy of the website and check to see if it's changed. Pager makes sending text messages to your cell phone to report on downtime a breeze.
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Pager users can subscribe to special services that broadcast information such as stock market quotations and up-to-the minute sports scores. The next generation of pagers will include the ability to acknowledge reception of a page and respond with a short, predetermined message.
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The six-digit pager address is expressed as six four-bit binary digits, thereby requiring a 52-bit transmission; a tone-only page can be transmitted in 44 milliseconds. For numeric or alphanumeric pagers, the paging data immediately follows the pager address in 26-bit blocks. Four numeric digits can be transmitted within the 16 data bits contained in each transmission block. Blocks containing message data do not contain the network identification code that is part of the address block. The original paging format specified that no more than 12 digits (three data blocks) could follow a pager address because the pagers themselves expect the network code to appear within four data blocks. Remember, pagers scanning for the correct frequency are looking for this code in order to lock into the channel.
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A page is the coded radio signal sent from a transmitter to the pager. Pages usually begin with the dialing of a telephone number to the user’s paging service provider, a company that maintains the paging transmitters and radio equipment. Placing a telephone call to the service provider enables the caller to access a computerized terminal. The caller hears a tone or receives instructions on how to page a subscriber. If the caller wants to leave a telephone number for the paged party to call, the caller can enter that number. Pressing the telephone’s pound (#) or star (*) key informs the paging terminal that the message is complete.
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The most popular pager option is Voice Mail. Callers dial your voice-mail number and hear your voice as a greeting. The caller is then able to leave a voice message, when the message is completed, your pager will notify you that there is a recording on your voice mail. You may then phone in to your voice mail to hear the pager message. A pager voice mail service cost on average, an extra $5 - $10 a month. Other pager options include stock quotes, news updates, sports scores and weathers and traffic information are ... available.
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A pager that falls into a particular group may only be paged by placing its pager address within the particular frame number fixed for that pager (... creating the eight groups). If there is no room to put the pager address within a frame, then the pager can not be alerted until that frame number comes around in the next batch, and there is room to put that pager address within that frame. No more than two pagers can be alerted within one frame but, in numeric or alphanumeric paging-only systems, only one pager can be alerted in a frame. Any message data for a pager is encoded and transmitted in fixed blocks, known as "codewords," starting directly after the codeword that contains the pager address. Most times the encoded message information is transmitted across many frames, thus blocking other pages from being placed within these frames. It is up to the paging terminal to pack tone-only, numeric and alphanumeric information for different pagers within frames in the most efficient manner possible to minimize the total number of frames required to output a given number of page requests.
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