Introduction to Digital Communication. Recently, I moved to Japan to take a new job. Upon my arrival here, I was heartbroken to discover that the only Internet access available was via 56k modem. I set up my PC, dug through my box of obsolete hardware, and pulled out my ancient 56k external modem. I was unable to find the cable to connect the modem to the PC, but I was able to make one rather quickly. I fired up the PC, turned on the modem, and connected to my local ISP. Soft red lights flickered on the modem; other lights gave a steady glow. As my password was being authenticated, it dawned on me that there are probably people out there that look at those lights and have no idea what they signify. Well, read on for some insight into the journey your 1's and 0's take from your PC to your modem. [kuro5hin.org]
Good explanation of basic data comm... I could have used this the other night when configuring the GDC modem :)
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