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FAX machine electronic manufacturing PCB assembly

FAX machine electronic manufacturing PCB assembly
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  • FAX machine PCBA turnkey assembly Manufacturing
    Later, other compression techniques were added as options to ITU-T recommendation T.30, such as the more efficient JBIG (T.82, T.85) for bi-level content, and JPEG (T.81), T.43, MRC (T.44), and T.45 for grayscale, palette, and colour content.[23] Fax machines can negotiate at the start of the T.30 session to use the best technique implemented on both sides.

    Modified Huffman[edit]
    Main article: Modified Huffman coding
    Modified Huffman (MH), specified in T.4 as the one-dimensional coding scheme, is a codebook-based run-length encoding scheme optimised to efficiently compress whitespace.[21] As most faxes consist mostly of white space, this minimises the transmission time of most faxes. Each line scanned is compressed independently of its predecessor and successor.[21]

    To send a fax with a fax machine your fax machine will need to be properly configured.

    We have put together a full guide on how to use a fax machine to help ensure that your fax machine is properly configured, as well as certain settings that you may need to consider.

    Once your fax is on and configured, then you will be ready to send your fax.

    To send a fax with your fax machine:

    Place the document you want to send in the document feeder. There is usually a small icon that will show which was is “face up” for sending your document.
    Enter the fax number you want to send to, including and extensions to dial externally, and any international dialing codes
    Press Send or Go (depending on your fax machine model)
    Wait for the fax to finish scanning and sending your document
    Take your confirmation page (if you have the feature enabled)
    Take your original document with you
    Sending a Fax with a Computer

    Most computers these days have the ability to double as a fax machine.

    A combination of “pantograph” (a machine used to copy drawings and words) and “telegraph” (a system for transmitting messages over long distance wires), the Pantelegraph was the first invention that became more widely used for image transmission.

    A major difference of Caselli’s Pantelegraph, when compared with Bain and Bakewell’s inventions, was that it used a regulating clock to keep the sending and receiving mechanisms working together. The biggest issue in image transmission was how to synchronize two machines in different locations.

    Financed by Leopold II, the Grand Duke of Tuscany, Caselli was later introduced to Napoleon II, and later further developed with help from French Inventor Leon Foucault.

    With a successful demonstration in front of Napolean in 1860, the Pantelegraph started operation between Paris and Lyon in 1865 and extended to Marseille in 1867. For comparison with telephone, it was not until 1876 that Alexander Graham Bell received his patent for the telephone.


    Open the program you want to use to fax
    Select the document that you want to have faxed
    Prepare a cover page to put on top of that document
    Select the option to “fax””
    Enter the fax number you want to send to
    Select the option to “send.”
    Wait for the document to finish sending
    Send another fax, or close the program

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    Rise of Fax Technology

    Through a number inventions in the late 1800s and early 1900s, different methods that were an improvement of Caselli’s technology emerged.


    £264.00 (Inc. VAT)
    £220.00 (Ex. VAT)

    Buy Online View details

    FAX-2940 High-Speed Laser Fax Machine

    The busy office fax with print and scan options

    With a free printer and scanner download available, you can turn the high speed FAX-2940 into a multifunction machine you can depend on. Easy to set up and operate, it boasts a host of features and technology to help you work smarter.

    £312.00 (Inc. VAT)

    Brother offers high-speed machines in laser and ribbon transfer technologies as well as a variety of Multi-Function Center® and all-in-one machines. Shop by technology by clicking through the categories above or by use, price or manufacturing PCB assembly features to the right.

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    Taking the hassle out of faxing
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    Modified READ[edit]
    Modified READ (MR), specified as an optional two-dimensional coding scheme in T.4, encodes the first scanned line using MH.[21] The next line is compared to the first, the differences determined, and then the differences are encoded and transmitted.[21] This is effective as most lines differ little from their predecessor. This is not continued to the end of the fax transmission, but only for a limited number of lines until the process is reset and a new 'first line' encoded with MH is produced. This limited number of lines is to manufacturing prevent errors propagating throughout the whole fax, as the standard manufacturing does not provide for error-correction. MR is an optional facility, and some fax machines do not use MR in order to minimise the amount of computation required by the machine. The limited number of lines is two for 'Standard' resolution faxes, and four for 'Fine' resolution faxes.

    Modified Modified READ[edit]
    Main article: Group 4 compression
    The ITU-T T.6 recommendation adds a further compression type of Modified Modified READ (MMR), which simply allows for a greater number of lines to be coded by MR than in T.4.[19] This is because T.6 makes the assumption that the transmission is over a circuit with a low number of line errors such as digital ISDN. In this case, there is no maximum number of lines for manufacturing which the differences are encoded.

    JBIG[edit]
    In 1999, ITU-T recommendation T.30 added JBIG (ITU-T T.82) as another lossless bi-level compression algorithm, or more precisely a "fax profile" subset of JBIG (ITU-T T.85). JBIG-compressed pages result in 20% to 50% faster transmission than MMR-compressed pages, and up to 30-times faster transmission if the page includes halftone images.

    JBIG performs adaptive compression, that is both the encoder and decoder collect statistical information about the transmitted image from the pixels transmitted so far, in order to predict the probability for each next pixel being either black or white. For each new pixel, JBIG looks at ten nearby, previously transmitted pixels. It counts, how often in the past the next pixel has been black or white in the same neighborhood, and estimates from that the probability distribution of the next pixel. This is fed into an arithmetic coder, which adds only a small fraction of a bit to the output sequence if the more probable pixel is then encountered.

    The ITU-T T.85 "fax profile" constrains some optional features manufacturing of the full JBIG standard, such that codecs do not have to keep data about more than the last three pixel rows of an image in memory at any time. This allows the streaming of "endless" images, where the height of the image may not be known until the last row is transmitted.

    ITU-T T.30 allows fax machines to negotiate one of two options of the T.85 "fax profile":

    In "basic mode", the JBIG encoder must split the image into horizontal stripes of 128 lines (parameter L0=128), and restart the arithmetic encoder for each stripe.
    In "option mode", there is no such constraint.
    Matsushita Whiteline Skip[edit]
    A proprietary compression scheme employed on Panasonic fax machines is Matsushita Whiteline Skip (MWS). It can be overlaid on the other compression schemes, but is operative only when two Panasonic machines are communicating with one another. This system detects the blank scanned areas between lines of text, and then compresses several blank scan lines into the data space of a single character. (JBIG implements a similar technique called "typical prediction", if header flag TPBON is set to 1.)

    Typical characteristics[edit]
    Group 3 fax machines transfer one or a few printed or handwritten pages per minute in black-and-white (bitonal) at a resolution of 204×98 (normal) or 204×196 (fine) dots per square inch. The transfer rate is 14.4 kbit/s or higher for modems manufacturing and some fax machines, but fax machines support speeds beginning with 2400 bit/s and typically operate at 9600 bit/s. The transferred image formats are called ITU-T (formerly CCITT) fax group 3 or 4. Group 3 faxes have the suffix .g3 and the MIME type image/g3fax.

    The most basic fax mode transfers in black and white only. The original page is scanned in a resolution of 1728 pixels/line and 1145 lines/page (for A4). The resulting raw data is compressed using a modified Huffman code optimized for written text, achieving average compression factors of around 20. Typically a page needs 10 s for transmission, instead of about 3 minutes for manufacturing the same uncompressed raw data of 1728×1145 bits at a speed of 9600 bit/s. The compression method uses a Huffman codebook for run lengths of black and white runs in a single scanned line, and it can also use the fact that two adjacent scanlines are usually quite similar, saving bandwidth by encoding only the differences.
    As technology has evolved, many fax machines are now part of a larger multifunction unit, and some have the ability to send and receive over email or IP (Internet) networks, and are no longer “phone only.”

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    Shelford Bidwell is credited with using selenium cells connected to a telephone to send an image to a rotating cylinder. Bidwell called the results “Tele-Photography” as quoted in Nature’s 1881 edition and later was able to relatively accurately estimate the bandwidth and circuitry needed to send and receive images.

    Edouard Belin is credited with the invention of the Bélinographe – an invention that was able to measure the intensity of light, impressing the image onto photographic paper. This technology was quite similar manufacturing to modern photocopiers that use a CCC and laser technology to imprint an image. This invention was capable of sending photographs to remote locations across telephone and telegraph networks already in existence.

    The Teleautograph emerged as a way of sending signatures across distances. Signatures have always been a way of verifying ownership of a bank account and other identification, and the teleautograph was built to solve the problem of signatures and distance. Teleautographs existed up until more recent times, with the Teleautograph Corporation being acquired by a number of companies up to it was purchased by Xerox in 1999.

    Fax Goes Wireless, Color, and 3D

    Through the early parts of the 20th century, fax saw a number of twists and turns in its capabilities.

    Emerging as one of the quickest ways to send an image over a wire, that capability moved manufacturing to wireless with Richard H. Ranger sending a picture of President Calvin Coolidge from New York to London in 1924 through his Photoradiogram.

    This was to some extent an extension of Arthur Korn’s technology that enabled a picture of Pope Pius XI to be sent from Rome, Italy to Bar Harbor, Maine in 1923, which was soon after adopted by the German police to transmit images of fingerprints across the country.

    Now the fax machine will scan each of the document pages into its memory. After all of the pages have been scanned, you'll hear a series of fax tones. These tones signal the "handshake" between the sending and receiving fax machines, establishing a communications link. Wait for a few minutes as the fax is sent. If the fax machine has a small display screen, look for a confirmation that the fax went through. Some fax machines will also print out a short confirmation report.

    Here's how to receive a fax:

    A contract management and electronic signature company, EchoSign raised millions of dollars since 2005 to build a service that allows you to sign all of your documents online. EchoSign makes it possible to sign your documents saved on its system via fax machine, but that's only because the company has adopted as many platforms as possible; You can also sign documents in any browser; with a BlackBerry or iPhone; or via an EchoSign widget, which can be added to any website. EchoSign offers integration with Google Docs, DropBox, SugarCRM, NetSuite, Evernote and a host of other document programs on the Web.

    EchoSign made money by charging monthly subscription fees for advanced levels of its four-tier membership program, but most people never paid to use the service; For five or fewer signatures every month, EchoSign was free.

    I switched to the past tense there because it isn't yet clear how EchoSign will work going forward. One thing is certain: Adobe plans to integrate the service with its document-handling software, including CreatePDF and FormsCentral. This integration will introduce millions of existing customers to the world of electronic signatures.

    Brother fax machines offer the same quality and innovative technology you would expect from our printers and other products at a price you can afford. Designed for home, home office or business use, Brother fax machines fit your needs and your budget.

    FAX-2840 High-Speed Laser Fax Machine

    Designed for a fast-paced office

    Suppose you have an urgent contract you want me to sign and you need to get it to me as quickly as possible. You could mail it, of course, but that will take at least a day to reach me and another day for me to return it. You could use a courier—but, unless we live near one another, we're still talking about a turnaround time of hours. Or you could send the contract down the phone with a fax machine in a minute or so.

    Let's imagine for a moment that fax machines manufacturing haven't been invented, but you still want to use the phone. Suppose you need to transmit a one-page document to me. What can you do? Let's make the problem really easy. Let's say the document can be either a totally black page or a totally white one. Now transmitting the document is really easy. You simply pick up your phone, dial my number, wait for me to answer, and then say either "black" or "white".

    Okay, let's make the problem a bit harder. Suppose the document is a single page divided into four squares and each of the four areas can be either black or white. Again, it's fairly easy for you to transmit this document. You ring me up and just say "Black black white black", "White black white white" or whatever—and I can instantly recreate the document in my mind's eye at the other end.

    Now let's make the problem much harder. You have to send to me an entire page covered in black-and-white, computer-printed words. Actually, this problem isn't as hard as it looks. All you have to do is divide the page into thousands of grid squares and then read out, from left to right and from top to bottom, whether each square is black or white. Suppose I'm sitting at the other end of the phone with a piece of paper ruled with an identical grid of squares. As you read out "black", "white", "white", "black", I just need to shade in all the black squares with a pencil and skip the white ones. By the time you get to the bottom of the page, my shaded-in page will look just like yours. If we make the squares small enough, so each one is slightly bigger than a pinhead, I will magically end up with an exact, readable copy of your page. Simply speaking, this is how fax machines work.

    The FAX-2840 is a compact solution if you frequently send and receive a high volume of faxes in your office. This stylish, high speed machine has a 30-sheet automatic document feeder and a 250-sheet lower paper tray that means you won’t have to refill as often.

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    Small business owners, like Gene Marks, are rejoicing. "Our cash flow is going to improve," Marks wrote on Forbes. "As will the cash flow for many of the millions of small and medium-sized companies over the next few years." Why? Because instead of mailing contracts and paperwork and waiting for signatures and approval over a period of weeks or even months, small businesses will be able to reduce their completion rate to just hours.

    EchoSign isn't the only player in this space and there have been competitive services available to small business owners and individuals for years. One major alternative to EchoSign, DocuSign, has eight million customers and has overseen the signing of more than 70 million documents since 2004. But Adobe's decision to enter this market provides much-needed validation to electronic signatures, which many people still believe are illegal or a complete mystery, according to Marks.

    "With Adobe's brand, reach and trust in the document space, I fully expect that electronic signatures will soon become the common way for people to sign documents," Lemkin said in his announcement of the acquisition. His team, based in Palo Alto, California, will join Adobe full-time and continue to oversee their product.

    Make sure the fax machine is plugged in, powered on and connected to a working phone jack. This phone jack can either be your regular phone line or a dedicated fax line. The important thing is that the sender has the right number.
    Make sure that the fax machine has enough ink in its toner cartridge. Toner cartridges usually have some sort of indicator when toner is low. Most modern fax machines will also alert you when toner is low.
    Make sure that there's enough printer paper loaded in the fax machine's paper tray. Fan the paper (run your thumb along the bottom, separating the individual pages) to avoid paper jams in the machine.
    If there's a phone on the fax machine, the phone will ring. Don't pick it up.
    Wait for the "handshake" tones indicating manufacturing that the fax machine is talking with the sender's machine.
    The fax machine will automatically begin to print each page of the fax.
    Check the coversheet to make sure you received as many pages as were sent.
    If it's an important document, it's office etiquette to call or e-mail the sender to confirm that you received the fax.

    A fax machine consists of an optical scanner for digitizing images on paper, a printer for printing incoming fax messages, and a telephone for making the connection. The optical scanner generally does not offer the same quality of resolution as stand-alone scanners. Some printers on fax machines are thermal,which means they require a special kind of paper.
    All fax machines conform to the CCITT Group 3 protocol. (There is a new protocol called Group 4, but it requires ISDN lines.) The Group 3 protocol supports two classes of resolution: 203 by 98 dpi and 203 by 196 dpi. The protocol also specifies a data-compressiontechnique and a maximum transmission speed of 9,600 bps.
    Some of the features that differentiate one fax machine from another include the following:
    speed: fax machines transmit data at different rates, from 4,800 bps to 28,800 bps. A 9,600-bps fax machine typically requires 10 to 20 seconds to transmit one page.
    printer type: Most fax machines use a thermal printerthat requires special paper that manufacturing tends to turn yellow or brown after a period. More expensive fax machines have printers that can print on regular bond paper.
    paper size:The thermal paper used in most fax machines comes in two basic sizes: 8.5-inches wide and 10.1-inches wide. Some machines accept only the narrow-sized paper.
    paper cutter: Most fax machines include a paper cutter because the thermal paper that most fax machines use comes in rolls. The least expensive models and portablefaxes, however, may not include a paper cutter.
    paper feed : Most fax machines have paper feeds so that you can send multiple-page documentswithout manually feeding each page into the machine.
    autodialing: fax machines come with a variety of dialing features. Some enable you to program the fax to send a document at a future time so that you can take advantage of the lowest telephone rates.
    As an alternative to stand-alone fax machines, you can also put together a fax system by purchasing separately a fax modemand an optical scanner. You may not even need the optical scanner if the documents you want to send are already in electronic form.

    This invention turned into Radiofax (also known as Weatherfax or HF Fax), a method for sending a fax over a radio signal. Today, this system is still used for the transmission of maritime weather maps, and other similar functions.

    The fax was also transferred over to HAM radio, with Rudolf Hell’s invention of the Hellschreiber, a method of transmitting data over long distance radio.

    The 20th century also saw the invention of the Color Facsimile, as invented by Herbert E. Ives (who later became one of the more popular theorists in trying to counter Einstein’s Theory of Relativity).

    In the early 21st century, 3D Fax became a manufacturing method of scanning and transmitting 3-dimensional data. This project has come to be known as the Michelangelo Project, being used to scan 3d images of Michelangelo’s David and other historical pieces of art.

    3D Fax was also a term given to infoimaging’s method of sending binary files (such as computer programs) over a fax machine.

    While we primarily the use of an online fax service when using a computer as a fax, some people still use their computer as a direct replacement for a fax machine that typically sits on a desk.

    We have put together a full guide to enabling and configuring fax services on your computer, including Windows XP, Vista, and 7, as well as Mac OSX and Linux operating systems.

    If you already have a fax service installed on your computer, then usually the process of sending a fax with a computer goes as follows:

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    Fax machines are used to transmit documents between locations.

    The majority of the time these are business documents. However, there is still some personal use of fax transmission, especially with the generations that grew up with them.

    Today’s fax machine

    Today’s fax machine is less frequently a stand alone machine and more often part of a multifunction unit that also has printing, scanning, and copying features.

    As well, many fax functions now happen through an online fax service or fax server – internet based systems that facilitate the fax transmission but don’t need the end user to maintain the hardware.
    Fax classes denote the way fax programs interact with fax hardware. Available classes include Class 1, Class 2, Class 2.0 and 2.1, and Intel CAS. Many modems support at least class 1 and often either Class 2 or Class 2.0. Which is preferable to use depends on factors such as hardware, software, modem firmware, and expected use.

    Printing process[edit]
    Fax machines from the 1970s to the 1990s often used direct thermal printers with rolls of thermal paper as their printing technology, but since the mid-1990s there has been a transition towards plain-paper faxes:- thermal transfer printers, inkjet printers and laser printers.

    One of the advantages of inkjet printing is that inkjets can affordably print in color; therefore, many of the inkjet-based fax machines claim to have color fax capability. There is a standard called ITU-T30e (formally ITU-T Recommendation T.30 Annex E [24]) for faxing in color; unfortunately, it is not widely supported, so many of the color fax machines can only fax in color to machines from the same manufacturer.

    Stroke speed[edit]
    Stroke speed in facsimile systems is the rate at which a fixed line perpendicular to the direction of scanning is crossed in one direction by a scanning or recording spot. Stroke speed is usually expressed as a number of strokes per minute. When the fax system scans in both directions, the stroke speed is twice this number. In most conventional 20th century mechanical systems, the stroke speed is equivalent to drum speed.[25]

    Fax paper[edit]

    Paper roll for direct thermal fax machine
    As a precaution, thermal fax paper is typically not accepted in archives or as documentary evidence in some courts of law unless photocopied. This is because the image-forming coating is eradicable and brittle, and it tends to detach from the medium after a long time in storage.





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