![]() ![]() In most instances the main computer allocates dynamic addresses to the sub or peripheral with each device having its own buffers to transmit and receive data. Each socket or port has its own address and each device has its own IP address (network interface identification and location addressing). This being a multi socketed product which connects all these peripheral devices together. To overcome this the ‘Router’ device was developed. This being dedicated to the installation it did not provide flexibility or speed & ease of reconfiguration when required. A system for connecting and routing data between these pieces of hardware was a necessity and this was initially achieved by extending & controlling the network within the main computer. Early computers depended on peripheral devices to enable data storage, printing and the use of remote dumb terminals. Multiprotocol routers were created in 1981, independently at MIT (Noel Chiappa) and Stanford (William Yeager), and were a critical component at the beginning of the computing revolution. In brief a modem converts data into a form suitable for transmission with the objective of sending secure data easily that can be decoded reliably. Whether transmitting data over copper, fibre or wireless technologies, anything that communicates requires some form of modem. There are a number of products on the market that meet the power, reliability and speed required for these applications with companies like Siretta ‘The Industrial IoT Company’ also offering ultra-low power products through their ZETA range of Industrial IoT modems. Reliability and low power consumption are more likely to be critical requirements for such remote cellular applications. However, within the Industrial IoT (IIoT) sector speed of data transmission, albeit still a factor to consider, can be less important as the data packets transmitted are typically smaller and, in many instances, sent less frequently. As individuals we consume digital content at a significant rate and indeed require and expect communication speeds to support & enable this in real time. With the role out of fibre optics, connected device speeds in the low gigabit are now possible. The speed of early modems was around 14 kilobits, today internet speeds are typically in the 50 to 200 megabit range and almost all modern broadband modems can achieve this. Nothing much has changed over the years except the speed and type of transmission. Adding code to the carrier was termed modulation and unscrambling the code was called demodulation, giving birth to the familiar term modem ( Modulation, Demodulation). This was similar to morse code as it produced a series of tones representing dashes and dots for each letter and symbol. The keystrokes where superimposed onto the carrier using a code developed by Hayes. One of the earliest solutions developed was for teleprinters which used a carrier. Transmitting information and communicating between devices was achieved either using cables, or alternatively via radio signals. Let us travel back to the early days before the existence of the internet. As we look to explain their unique differences it is worth taking a short history lesson. As technology moves forward it is understandable that a degree of confusion exists as in many instances the black boxes supplied by our internet service providers (ISP’s) contain both technologies. These devices remain of paramount importance in our digital world and historically have been regarded as very separate and non-interchangeable, both with a unique purpose. Questions such as do you need a router if you have a modem and are modems and routers the same thing are commonplace. SIM Free – Continuous Survey LTE Logger (USA).SIM Free – Continuous Survey LTE Logger (AP).SIM Free – Continuous Survey LTE Logger (EU).SIM Free – Multiple Survey LTE Analyser (EU).SIM Free – Multiple Survey LTE Analyser (AP).SIM Free – Single Survey LTE Analyser (USA).SIM Free – Single Survey LTE Analyser (EU).Remote Continuous Survey LTE Logger (USA).Remote Continuous Survey LTE Logger (EU). ![]() Dual Port Small Footprint UMTS Router (EU).Dual Port Dual SIM LTE Router (EU) with GPS. ![]()
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