Several Hayes commands can be used on the same line, eliminating the need to type AT before each command. Semicolons are used as command delimiters. If Hayes commands are to be entered on separate lines, a pause can be entered between the previous and the next command until an OK is encountered. This avoids having to send multiple Hayes commands at a time without waiting for every command response.
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Techopedia Explains Hayes-Compatible Modem Modems that recognize the same set of commands defined by Hayes in the Hayes command set are called Hayes-compatible. Share this Term. And by using cheaper parts inside, it could sell for much less than a real Hayes, but it was almost as good.
Competition quickly picked up. But the problem for Hayes was that after releasing a modem that ran at bits per second in , it was slow to release anything faster.
US Robotics answered this market need by releasing a bps modem, which left Hayes on its heels. When it finally released one in it lacked error correction, which made the USR modem look like a higher quality product. In an international standard for bps emerged, so Hayes abandoned its unsuccessful design and replaced it with the industry standard.
But by then, Hayes had to share its spot at the top of the mountain with USR. The situation was very much like the situation with IBM and Compaq with computers. This squeezed Hayes from both sides. US Robotics was the best, and Hayes was the second-best. But companies like Zoom Technologies and Supra Corporation offered modems that were almost as good as Hayes, and much cheaper. So most people just bought a Zoom or Supra.
The last dialup modem I used regularly was a Hayes. But ironically, it had a Rockwell chipset in it. Virtually nothing distinguished it from lesser brands at that point.
But the biggest problem for Hayes was the future. Hayes saw way back in that the limits of copper wire would be the end of dialup modems. But it bet on ISDN becoming the standard to replace dialup. Instead, consumers opted for ADSL or cable modems. Hayes invested a ruinous amount of money in a product that had no commercial viability.
Hayes went bankrupt in , merged with rackmount modem maker Access Beyond in , and was bankrupt again by Zoom Technologies bought the Hayes name in , and rebranded some of its products under the Hayes name. Hayes modems had two operating modes, data mode and command mode. In data mode, the modem just sent data over its line uninterrupted.
Software that expected a genuine Hayes modem might not work optimally, but it would probably work. A fully Hayes compatible modem stored its configuration the same way as a Hayes and recognized the full command set, including the more obscure commands.
This meant software that expected a Hayes modem would work just as well with a compatible modem. In the late s, as Hayes fell behind the industry, US Robotics had to extend the command set. This meant most modems were no longer fully compatible with each other.
But by then, but personal computers were much more powerful and could deal with the differences by using device drivers. Terminal software would use drivers, much like word processors did with printers. And eventually, Microsoft Windows dealt with the issue at the operating system level. Wifi modems use it so early computers can get on the Internet to connect to BBSs instead of having to rely on copper telephone lines, which are increasingly rare today.
This lets old terminal software work with a new modem without rewriting them, which would be impractical in many cases. And modern USB modems typically use it for backward compatibility, to support legacy business applications.
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