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5-10 Using the AT Automatic Calling Interface
Using the
AT ACU
Display S-Register Value (AT?)
This command displays the contents of the “selected” S-Register, as stored in volatile
memory. The “selected” S-Register is the last S-Register that was accessed using an
S-Register command or the ATSn command. The number must be within the
S-Register’s specified range. On power-up, S-Register 0 is “selected.”
If you try to read the contents of an unused S-Register, the modem displays OK.
Change S-Register Value (ATSx=n)
This command lets you change the value of an S-Register stored in volatile
memory. n is the S-Register to change, and x is the value. x must be a number
within the S-Register’s range.
If you try to change the value of an unused S-Register, the modem displays OK.
Change S-Register Value (AT=x)
This command lets you change the value of an S-Register stored in volatile memory.
The “selected” S-Register is the last S-Register that was accessed using an
S-Register command or the ATSn command. x must be a number within the specified
range for the S-Register. On power-up, S-Register 0 is “selected.”
If you try to change the value of an unused S-Register, the modem displays OK.
S-Register Descriptions
S-Register 0—Ring Count to Answer On
This S-Register specifies the ring on which the modem automatically answers a call.
When set to 0, automatic answering is disabled, and calls must be answered manually.
This register has no meaning unless Answer=Using S0 (ACU OPT’S).
Settings:
Selected S-Register
Fo rm a t: AT? <CR >
Settings: n
, Specifies S-Register
x
, Specifies value of S-Register
Fo rm a t:
AT S
n
=
x
<CR>
Settings: x
, Specifies value of selected S-Register
Fo rm a t:
AT =
x
<CR>
Stored in Nonvolatile Memory?:
Ye s
Status-Only?:
No
Default Setting:
0
Range:
0 to 255