in the
when
the
command
letter
R
is
entered
at
the
end
of
a
Dialing
dialing command. When this is done, the command modem will
switch to Answer mode
as
soon
as
the
number
is
dialed
R
and then transmit a carrier signal to the other modem.
For
example,
entering
ATD5551212R
and
hitting
Return
would
cause the number 555-1212 to be dialed and cause the com-
mand modem to
transmit
a
carrier
signal
at
the
end
of
the
dialing
sequence.
S-Register
The
S
command can be used to both assign a value to or read
Read or
the current value of an S-Register. (Refer toAppendix E of this
Write
manual for the function of each S-Register.) The format for
reading an S-register is
to
enter
the
letter
S
(upper
case)
Sn?
followed by the register number and a question mark ? and then
hit
Return.
For
example, entering
ATS7?
and hitting Return will
SN=xxx
display the value of S-Register 7 in a 3 digit Decimal
form. The
number 30 would appear as 030, and the number 255 would
appear as
255.
The format for assigning a value to an S-register is to enter the
letter S followed by the
register
number
followed
by
an
equal
sign,
and then enter the new value in a decimal format. ASCII
characters will have to
be converted to their decimal equivalents
before being entered. S-Register decimal values can range from
0 to 127 for ASCII characters, or from 0 to 255 for numeric values.A complete ASCII
character Code/Hex/Decimal conversion chart
is located in Appendix A.
For example, if you wish to have longer pauses caused by the
comma in a dialing command, enter
ATS8=5
to assign 5 as
the value for the S-
Register S8 (meaning that the modem will
pause five seconds for the comma in the dialing command
instead of the normal two). Or, if you wish to configure the
command modem to answer incoming
calls after the 30th ring,
instead of after the first ring, enter
ATS0=30
and hit Return to
assign the value 30 to S-Register S0.
Once an S-Register is selected, it remains selected until another
register is selected.
The value of that S-Register can then be
read by entering
AT?
and changed by entering
AT=
and the new
value.
Result
The
command
modem
can
display
its
Result
Codes
on
your
Codes-
supervisory
console.
These
codes
can
appear
either
in
word
Word or
(verbose) or single digit (terse) form.
Digit
For
example,
if
after
dialing,
no
carrier
signal
is
detected,
the
V0-1
result can be displayed either as NO CARRIER or as the digit 3.
The
V
command is used to determine which method is used.
Entering
ATV0
will cause the command modem to display the
Result Codes as digits,
while
ATV1
will display them as words.If you do not select a method, the factory default setting will
cause the command modem to use the verbose results.
The following shows the terse and verbose result codes and a
description of each
code.
Terse
Verbose
Description
0
OK
Your command was executed without errors.
1
CONNECT
A carrier signal has been detected 300 bps.
2
RING
A ring signal has been detected from an
incoming call.
3
NO
No carrier signal has been detected, or the
CARRIER
carrier signal was lost.
4
ERROR
An error is present in your command
sequence, e.g. invalid characters or too
many characters.
5
CONNECT
A carrier signal has been detected at
1200
1200 bps.
10
CONNECT
A carrier signal has been detected at
2400
2400 bps.
