ADTRAN Express XRT manual Using an AT Command, Using S-Registers, Reading an S-Register

Appendix A. AT Commands and S-Registers

maximum length for a command line is 40 characters. Each com- mand line is executed by the Express XRT upon receipt of a termi- nating character. The default terminating character is a carriage return (ASCII 013), but it can be changed by writing a different value to register S3. Before the terminating character is transmit- ted, the command line can be edited by using the backspace char- acter (ASCII 008) to erase errors so the proper commands can be entered.

Using an AT Command

Type AT followed by the letter of the command and numeric val- ue of the setting desired and then press Enter. The following com- mand returns the software version of the unit:

ATI1

Using S-Registers

The configuration of the Express XRT can be changed or reviewed with S-registers. See the section S-Register List on page 63 for a de- scription of each S-register and its corresponding range of values.

Reading an S-Register

Type ATS followed by the number of the S-register to be read fol- lowed by a question mark and press Enter.

ATS0?

Reading an S-Register String

The Express XRT uses S-register strings to store strings of digits for stored phone numbers, SPIDs, etc. Type ATSS followed by the number of the string S-register to be read followed by a ques- tion mark and press Enter.

ATSS80?

Changing an S-Register

Type ATS followed by the number of the S-register to be changed, an equal sign, the numeric value to be assigned to the register, then press Enter.

ATS0=2

58 Express XRT User Guide 61202.153L3-1