Research & Development
10. S-Register Description
In most bit-mapped S-registers, the default bit value is 0. Non-0 default values are
followed by an asterisk. In some cases, default values are shown in the reference
column preceded by +. Some bits are reserved for factory use and should not be
changed.
10.1 Basic S-Registers "ATSn=x"
Command
Function & Description
+Ref.
S0=
Set the number of rings on which the modem will answer. 0 value
disable auto-answer
+000
S1=
Counts and stores number of rings from an incoming call
+000
S2=
Define escape code character, default ‘+’ (43 dec.). A value of 128-255
disables the escape code
+043
S3=
Define ASCII Carriage Return
+013
S4=
Define ASCII Line Feed
+010
S5=
Define ASCII Backspace. A value of 128-255 disables the Backspace
key’s delete function
+008
S6=
Set the number of seconds the modem waits before dialing if ‘X0’ or
‘X1’ is selected. If a setting of ‘X2’ to ‘X7’ is selected, the modem will
dial as soon as it detects a dial tone. This register also sets the time-out
interval for the “W” dial modifier to wait for the dial tone. (See also
S41b4)
+003
S7=
Set duration, in number of seconds modem waits for a carrier
+060
S8=
Set duration, in seconds, for pause (,) option in Dial command and
pause between command re-executions for Repeat (>) command
+002
S9=
Set duration, in tenths of a second of remote carrier signal before
recognition (Ignored if in non-FSK or half-duplex operation)
+006
S10=
Set duration, in tenths of a second, modem waits after loss of carrier
before hanging up
+007
S11=
Set duration and spacing, in milliseconds, of dialed Touch-Tones
+070
10.2 Extended S-Registers "ATSn=x"
Command
bit dec
hex
Function and description
Ref.
S13= bit
dec
hex
Bit-mapped
register
+000
1
2
2
Capture modem manufacturer information during
V.42 handshake, can be displayed at ATI2 <Last
Speed/Protocol> line if available (‘Flash’ or
‘ ZyXEL’ stands for ZyXEL connection)
S14= bit
dec
hex
Bit-mapped
register:
+002
1
0
0
Grant Remote Digital Loop-back test request
&T4
2
2
Deny Remote Digital Loop-back test
&T5
S15= bit
dec
hex
Bit-mapped
register
+066
0,1
0 0 Even
parity
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Revision 1.0
2003/6 From 3JTech