DEFINITY Communications System | APPENDIX B: S-REGISTERS |
7400B Data Module | |
User’s Guide | Page B-1 |
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APPENDIX B: S-REGISTERS
This appendix contains an explanation of each S-register used by the 7400B Data Module. An S-register is an 8-bit location in non-volatile memory that is used for storing the value of one or more configuration parameters. When the data module is first powered on, the values that were last stored in the S-registers are the values in effect until AT commands are issued to change them.
You can check the current value stored in all S-registers with the &V command (see description in Appendix A, “AT Command Set”). To look at the contents on just one register, use the command Smm?, where mm is the number of the S-register.
To change the value in any one S-register directly, use the command Smm=nnn, where mm is the number of the S-register and nnn is the number you wish to place in the register. The following dialog illustrates the use of the S command to read and change the value contained in an S-register:
ats18? [ Enter ]
055
OK
ats18=120 [ Enter ]
OK
The first command request the value stored in register S18. The data module returns the value 055, followed by OK. The next command changes the value in register S18 to 120, and the data responds with OK. You could enter the first command a second time to verify that the value was changed correctly.
More information is provided in the following definitions of the labels used in the S-register descriptions.