A file transfer protocol that adds batch file processing to Xmodem. Multiple files can be sent at the same time. It is faster than Xmodem and sends the file name before sending the data. Ymodem-G transmits without acknowledgment when error-free channels or modems with built-in error correction are used, but transmission is cancelled upon any error.
An improvement on the XMODEM file transfer protocol that transfers data in blocks of 1,024 bytes, performs a cyclic redundancy check (CRC) on each block, supports the transfer of multiple files in a batch transmission, and supports file transfer abort. XMODEM and YMODEM have largely been replaced by ZMODEM. See also CRC, protocol, XMODEM, and ZMODEM.
Extension and improvement of the XMODEM protocol that was used for file transfers., developed by Chuck Forsberg over several years in the 1980s, replaced XMODEM almost totally by the early 1990s.