Z modem - definição. O que é Z modem. Significado, conceito
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O que (quem) é Z modem - definição

COMMUNICATIONS PROTOCOL
ZModem; Zmodem; Z-MODEM; ZedZap

K56flex         
  • Cable modem
  • Collection of modems once used in Australia, including dial-up, DSL, and cable modems.
  • A bluetooth radio module with built-in antenna (left)
  • The original 300-baud Hayes Smartmodem
  • 127x127px
  • 110x110px
  • notebooks]]
  • Dial-up modem bank at an ISP
  • ISA]] card
  • Null modem adapter
  • TeleGuide terminal
  • An ONT providing data, telephone and television service
DEVICE THAT MODULATES AN ANALOG CARRIER SIGNAL TO ENCODE DIGITAL INFORMATION
K56flex; K56Plus; Computer modem; X2 (protocol); Telephone modem; 56 kbit/s modem; Modems; MODEM; 56K; 56k; 56 Kbps modem; 56,000 bps modem; V.Flex2; K56Flex; K56plus; X2 (Chipset); Analog modem; 56K modem; Mdoem; External modem; Intelligent modem; Limited Distance Modem; Mobile USB modem; Dial-up modem; 56k modem; 56k Modem; Gsm modem; 3G dongle; Portable modem; Volksmodem; Voiceband modem; Usb modem; 56kbit modem; 🖀; Phone Modem; Optical modem; 300 baud; Draft:Modem; Automatic calling unit; Automatic calling units; 33.6k modem
<protocol> A modem standard developed by Rockwell for 56 kbps communications. K56flex Became more popular than the rival X2 but will be superseded by the official V.90 standard. [Already superseded?] (1998-09-08)
MODEM         
  • Cable modem
  • Collection of modems once used in Australia, including dial-up, DSL, and cable modems.
  • A bluetooth radio module with built-in antenna (left)
  • The original 300-baud Hayes Smartmodem
  • 127x127px
  • 110x110px
  • notebooks]]
  • Dial-up modem bank at an ISP
  • ISA]] card
  • Null modem adapter
  • TeleGuide terminal
  • An ONT providing data, telephone and television service
DEVICE THAT MODULATES AN ANALOG CARRIER SIGNAL TO ENCODE DIGITAL INFORMATION
K56flex; K56Plus; Computer modem; X2 (protocol); Telephone modem; 56 kbit/s modem; Modems; MODEM; 56K; 56k; 56 Kbps modem; 56,000 bps modem; V.Flex2; K56Flex; K56plus; X2 (Chipset); Analog modem; 56K modem; Mdoem; External modem; Intelligent modem; Limited Distance Modem; Mobile USB modem; Dial-up modem; 56k modem; 56k Modem; Gsm modem; 3G dongle; Portable modem; Volksmodem; Voiceband modem; Usb modem; 56kbit modem; 🖀; Phone Modem; Optical modem; 300 baud; Draft:Modem; Automatic calling unit; Automatic calling units; 33.6k modem
MOdulator DEModulator
Modem         
  • Cable modem
  • Collection of modems once used in Australia, including dial-up, DSL, and cable modems.
  • A bluetooth radio module with built-in antenna (left)
  • The original 300-baud Hayes Smartmodem
  • 127x127px
  • 110x110px
  • notebooks]]
  • Dial-up modem bank at an ISP
  • ISA]] card
  • Null modem adapter
  • TeleGuide terminal
  • An ONT providing data, telephone and television service
DEVICE THAT MODULATES AN ANALOG CARRIER SIGNAL TO ENCODE DIGITAL INFORMATION
K56flex; K56Plus; Computer modem; X2 (protocol); Telephone modem; 56 kbit/s modem; Modems; MODEM; 56K; 56k; 56 Kbps modem; 56,000 bps modem; V.Flex2; K56Flex; K56plus; X2 (Chipset); Analog modem; 56K modem; Mdoem; External modem; Intelligent modem; Limited Distance Modem; Mobile USB modem; Dial-up modem; 56k modem; 56k Modem; Gsm modem; 3G dongle; Portable modem; Volksmodem; Voiceband modem; Usb modem; 56kbit modem; 🖀; Phone Modem; Optical modem; 300 baud; Draft:Modem; Automatic calling unit; Automatic calling units; 33.6k modem
A modulator-demodulator or modem is a computer hardware device that converts data from a digital format into a format suitable for an analog transmission medium such as telephone or radio. A modem transmits data by modulating one or more carrier wave signals to encode digital information, while the receiver demodulates the signal to recreate the original digital information.

Wikipédia

ZMODEM

ZMODEM is an inline file transfer protocol developed by Chuck Forsberg in 1986, in a project funded by Telenet in order to improve file transfers on their X.25 network. In addition to dramatically improved performance compared to older protocols, ZMODEM offered restartable transfers, auto-start by the sender, an expanded 32-bit CRC, and control character quoting supporting 8-bit clean transfers, allowing it to be used on networks that would not pass control characters.

In contrast to most transfer protocols developed for bulletin board systems (BBSs), ZMODEM was not directly based on, nor compatible with, the seminal XMODEM. Many variants of XMODEM had been developed in order to address one or more of its shortcomings, and most remained backward compatible and would successfully complete transfers with "classic" XMODEM implementations. This list includes Forsberg's own YMODEM.

ZMODEM eschewed backward compatibility in favor of producing a radically improved protocol. It performed as well or better than any of the high-performance varieties of XMODEM, did so over links that previously didn't work at all, like X.25, or had poor performance, like Telebit modems, and included useful features found in few or no other protocols. ZMODEM became extremely popular on bulletin board systems (BBS) in the early 1990s, becoming a standard as widespread as XMODEM had been before it.