Host-Based Controller Modem
Data Addendum
AT Command Set
June 15, 1998
AT Commands Reference S-Registers (continued)
Lucent Technologies Inc.
Version 1.0
30
S4
Response Formatting Character (user defined)
This register determines the ASCII value used as the line feed character. The modem uses a line feed character
in command mode when it responds to the computer.
Range:
0—127, ASCII decimal
Default:
10 (line feed)
Units:
ASCII
Note:
This register value is not stored with &W command.
S5
Command Line Editing Character (user defined)
This register sets the character recognized as a backspace and pertains to asynchronous only. The modem will
not recognize the backspace character if it is set to a value that is greater than 32 ASCII. This character can be
used to edit a command line. When the echo command is enabled, the modem echoes back to the local DTE the
backspace character, an ASCII space character, and a second backspace character. This means a total of three
characters are transmitted each time the modem processes the backspace character.
Range:
0—127, ASCII decimal
Default:
8 (backspace)
Units:
ASCII
Note:
This register value is not stored with &W command.
S6
Wait Before Dialing
This register sets the length of time, in seconds, that the modem must wait (pause) after going off-hook before
dialing the first digit of the telephone number. The modem always pauses for a minimum of two seconds, even if
the value of S6 is less that two seconds. The wait for dial tone call progress feature (W dial modifier in the dial
string) will override the value in register S6. This operation, however, may be affected by some ATX options
according to country restrictions.
Range:
2—65
Default:
2
Units:
seconds
S7
Connection Completion Time-Out
This register sets the time, in seconds, that the modem must wait before hanging up because carrier is not
detected. The timer is started when the modem finishes dialing (originate), or goes off-hook (answer). In
originate mode, the timer is reset upon detection of an answer tone if allowed by country restriction. The timer
also specifies the wait for silence time for the @ dial modifier in seconds. S7 is not associated with the W dial
modifier.
Range:
1—255
Default:
50
Units:
seconds
