Configuring and Testing Using the Windows Utility
3-9
Using S-Registers
The S-Registers are used to set various timing parameters,
redefine selected ASCII characters, and other configuration
options. They remain the same in all the ROM templates, but
can be reconfigured for special purposes. A detailed summary
of the S-Register functions is in Appendix B. Table 3.4 on the
next page lists all the S-Register options that are stored in
NVRAM. For a detailed description, see Appendix B.
These commands can be used in configuring S-Registers:
S
r
=
n
Set S-Register value
:
r
is any S-Register;
n
must be a decimal
number between 0 and 255. For example:
ATS0=2 <Enter>
This example would set S-Register 0, or number of rings the
modem listens for before answering, to two rings.
S
r
.
b
=
n
Set bit-mapped register value
:
r
is the bit-mapped register; .
b
is
the bit;
n
is 0 (off) or 1 (on). For example:
ATS13.0=1 <Enter>
This example tells the modem to reset when the Data
Transmission Ready (DTR) signal drops.
S
r
?
List current value of register
r
. For example:
ATS0?
This register query asks the modem the number of rings before
it answers. A typical response would be:
2
OK
This answer shows that the modem listens for two rings before
answering, while
OK
shows that the modem is ready for
another command.