T
ECHNICAL
R
EFERENCE
S Registers
Note:
To change a setting use
ATSr
=
n
, where
r
is the register and
n
is a decimal value from 0
−
255 (unless otherwise indicated).
Register Default
Function
8-13
S0
0
Sets number of rings on which to answer in Auto Answer mode. When set to 0, Auto Answer is disabled.
S1
0
Counts and stores number of rings from an incoming call. (S0 must be greater than 0.)
S2
43
Stores ASCII decimal code for the escape code character. Default character is
+
. A value of 128 – 255 disables escape code.
S3
13
Stores ASCII code for the Carriage Return character. Valid range is 0 – 127.
S4
10
Stores ASCII decimal code for the Line Feed character. Valid range is 0 – 127.
S5
8
Stores ASCII decimal code for the Backspace character. A value of 128
−
255 disables Backspace key’s delete function.
S6
2
Sets number of seconds modem waits before dialing. If X
n
is set to X2 or X4, this is time-out length if no dial tone.
S7
60
Sets number of seconds modem waits for a carrier. May be increased as needed, for example to allow modem time to establish
an international connection.
S8
2
Sets duration, in seconds, for pause (,) option in the Dial command.
S9
6
Sets required duration, in tenths of a second, of remote modem’s carrier signal before recognition by your 3Com U.S. Robotics
modem.
S10
14
Sets duration, in tenths of a second, that modem waits to hang up after loss of carrier. This guard time allows your modem to
distinguish a line disturbance from a true disconnect (hang up) by the remote modem.
Note:
If you set S10 = 255, the modem will not hang up when carrier is lost. Dropping DTR hangs up the modem.
S11
70
Sets duration and spacing, in milliseconds, for tone dialing.
S12
50
Sets duration, in fiftieths of a second, of guard time for escape code sequence (+++).
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