Commands to Change or Read Registers
F-62 AT Commands
Commands to Change or Read Registers
This section explains how to change S-register and :T-register values and describes
each register. Some registers control a single function. Other registers control several
functions and are bit mapped. Use bit mapped registers for reading modem status only.
Use commands or switches to change the modem’s settings.
Sn=x or :Tn=x Change the Value of a Register
Changes the value of S-register or :T-register “n” to a new value “x”.
=x Change the Value of the Last Referenced S-Register
Changes the value of the last referenced S-register or the register pointed to with the
ATSn command. For example, if the last register command used was ATS0=2, issuing
AT=4 changes the value of register S0 from 2 to 4.
? Display the Value of the Last Referenced S-Register
Displays the value of the last S-register referenced in a read, write, or point to
command.
Sn Point to New Register
Where n is an integer from 0 to 27, indicating a register. Instructs the modem to point
to the register whose location is n. This becomes the last referenced register. For
example, typing ATS1 places the pointer at register S1 and returns the command
prompt.
%Rn ; Read All Registers
%R0
Displays the contents of all S registers in decimal and hexadecimal integers in tabular
format.
%R1
Displays the contents of all :Tn=n commands in decimal and hexadecimal integers in
tabular format.
Read Configuration Register
Sn?
Where n is an integer, indicating an S-register.
:Tn?
Where n is an integer, indicating a :T-register.
Displays the contents in decimal form only of register “n”.
