AT&T 7400B Plus User Manual page 162

APPENDIX C: S-REGISTERS
Page C-6
Register:
Description:
Range of
Values:
Storable:
Comments:
See Also:
Register:
Description:
Range of
Values:
Storable:
Comments:
See Also:
S4
This S-register holds the ASCII value for the line feed character.
Value may be 000 through 127; factory default setting is 010,
usually output by the Ctrl-J key combination from a display
terminal.
no
none
Chapter 3, "Configuration and Operation."
S5
This S-register holds the ASCII value for the backspace character.
Value may be 000 through 032 and 127; factory-default value is
008, usually output by the Backspace key of a data terminal.
no
The operation of the backspace character is to move the cursor
left one character space and (on a command line) erase the
character moved to. If command echo is enabled (AT command
E1), the output of the backspace character is actually three
characters: backspace, space, backspace.
Chapter 3, "Configuration and Operation."
DEFINITY Communications System
7400B Plus Data Module
User´s Guide