User's Guide for ZyXEL Omni 56K USB Modem
L
other programs that software pirates distribute on the Internet.
Western Jack Telephone wall outlet connector used in the USA and other countries.
WWW (World Wide Web) – Frequently used when referring to "The Internet", WWW has two
major meanings – First, loosely used: the whole constellation of resources that can be
accessed using Gopher, FTP, HTTP, telnet, USENET, WAIS and some other tools.
Secondly, the universe of hypertext servers (HTTP servers).
X. The ITU-TSS X.– standards describe data transfer in public data networks.
XMODEM A widely used, though somewhat aged, file transfer protocol. The use of 128 byte data
blocks severely limits the achievable throughput.
XON/XOFF Software flow control. The data flow is stopped by sending ASCII character Control-Q
(dec. 17; hex $11) and restarted by Control-S (dec. 19; hex $13).
YModem A file transfer protocol that uses data blocks of 1 Kbyte and transfers filenames and more
than one file in one transfer.
ZModem A file transfer protocol with variable block size, re-initiation of aborted transfers and
transfer of several files in one transfer along with file (and path) names.