User's Manual

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Appendix 6: Description of the registers
Appendix 6: Description of the registersAppendix 6: Description of the registers
Appendix 6: Description of the registers
Registers used by the ‘AT’ protocol
This section shows a list of all the registers that configure the modems with software
such as HyperTerminal for Windows.
The B900ss-20 modem will offer several facilities of possible settings.
Each parameter will be in a register and will have a default value that can be changed
in sending the command 'ATSxxx=yy' (Hayes command). Also, the parameter value will
be read when sending the command 'ATSxxx?'.
These parameters are stored in the EEPROM memory and will be available as soon as
powered up.
NOTE: Access Type: 'R' Read and/or 'W' Write.
Access
Type
Register
Name Description
Frequency Jump
Frequency JumpFrequency Jump
Frequency Jump
R/W S200 No. of Used Frequency Table Between 0 and 8. When Table 0 is selected, the channels
remain the same and stay on the selected channel in S201 (used
for the tests).
Default: 1.
Default: 1.Default: 1.
Default: 1.
R/W S201 First Frequency reserved for
the synchronization.
Between 0 and 49. Has to be different from S202, S203 and
S204.
Default: 0.
Default: 0.Default: 0.
Default: 0.
R/W S202 Second Frequency reserved
for the synchronization.
Between 0 and 49. Has to be different from S201, S203 and
S204.
Default: 15.
Default: 15.Default: 15.
Default: 15.
R/W S203 Third Frequency reserved for
the synchronization.
Between 0 and 49. Has to be different from S201, S202 et S204.
Default: 30.
Default: 30.Default: 30.
Default: 30.
R/W S204 Fourth Frequency reserved for
the synchronization.
Between 0 and 49. Has to be different from S201, S202 et S203.
Default: 45.
Default: 45.Default: 45.
Default: 45.
R S206 Dwell Timer Length Calculated based on the serial connection speed (S210), the
buffer size (S215) and the Client Count (S253). Given in
milliseconds.
Default: 110 ms (38400 Bd/130 Bytes/1 client).
Default: 110 ms (38400 Bd/130 Bytes/1 client).Default: 110 ms (38400 Bd/130 Bytes/1 client).
Default: 110 ms (38400 Bd/130 Bytes/1 client).