home *** CD-ROM | disk | FTP | other *** search
/ Developer Source 18 / Developer Source Volume 18 (I-MODE Publications, Inc.)(2000).iso / ntvar / jun97 / kessf101.gif < prev    next >
Graphics Interchange Format  |  1998-02-10  |  69.3 KB  |  583x339  |  4-bit (16 colors)
   ocr: THE TRADITIONAL ANALOG WAY UNNNNUA Public AVANAUNA telephone ONANNAR nelwork UUNN Host Andog Analog Host modem modem 33,6Kbps Full duplex AUL =U Digital waves Sinc waves Figure 1: The syansmitting host sends a digital bit stream (digital towves) 10: the: modem. The prodem, in turm, ises the. digital data to odulate tbe analog signal (sine mares) sent tbrough the vetcork. On the: narmg side, tbe: modem demodulate the malog signal to regenerate the digital data t be delivered to tbe destination irost. In: rralit, a number of pulse code moirdation PCM) analog/aigital conversions migbt ncer within ...