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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.