USRobotics V.34 - Manual (Page 245)

COURIER HIGH SPEED MODEMS
10 Index
X
Xmodem-type protocols, 4-25, 4-29
XID, 6-6
XON/XOFF, 4-25, 4-28
character assignments (S22 and S23),
B-14, B-20
Y
Ymodem, A-8
Ymodem-G, A-8
Z
.ZIP file, A-6
Zmodem, A-8