FP Modem-EU Technical Manual
5.2 Register Settings
5.2 Register Settings
The FP Modem-EU has a number of internal registers at its disposal, i.e. the S registers,
through which operation can be controlled. One can distinguish between two types of registers:
• Normal registers, the value of which represents a time or a character
• Bit mapped registers, in which a function is allocated to each bit.
The content of registers is represented as a decimal number.
The command set of the modem contains two commands with the help of which the content of a
register can be viewed or edited.
Command Function Content of the Register
ATSr?
With this command you can display the
content of the register with the number r.
The content is returned to the DTE as a
three-digit decimal number.
ATSr=n
The content of a register can be edited with
this command.
The number of the register is r and n is the
edited value.
AT&V
View all current settings. ---
It is advisable not to modify the contents of a bitmapped register directly.
Modifications should be carried out with the help of the respective AT
commands (see "
Command Tables" on page 68).
All registers that are marked with a * sign can be stored with the "AT&W" command. All other
registers contain the factory setting after a software reset or a power ON reset has been
executed.
In the following, you will find a list of the different registers.
No. Description
Range
of values
Factory
Setting
S0 *
Sets the number of the rings required before the modem automatically
answers a call. If this register is set to 0, the automatic answer mode is
disabled.
0-5 1
S1
Ring counter: Every incoming ring signal increases the content of the register
by one. The register is set to 0 if an interval of 8 seconds is detected after a
ring signal.
0-255 0
S2 *
Determines the ASCII character for the ESCAPE command that is used for
switching from data mode to command mode.
0 - 127 43 = "+"
S3
ASCII character for carriage return 0 - 127 13 = "CR"
S4
ASCII character for line feed 0 - 127 10 = "LF"
S5
ASCII character for backspace (backspace, delete to the left of the cursor, <-) 0 - 32 8 = "BS"
S6 *
Waiting period in seconds between the entering of ATD and the dialing if dial
tone detection is switched off.
3 - 6 3
S7 *
Waiting period in seconds from the end of dialing to the answer tone of the
remote station. If no answer tone is received during that period of time, the
modem terminates the connection. The timer is started when the modem has
finished dialing (Originate), or 2 seconds after answering.
5 - 100 45
S8 *
Waiting period in seconds for a dial pause (,) within the command ATD...W... 0 - 255 2
75
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