ADTRAN Express XRT User Manual

Page 72

Appendix A. AT Commands and S-Registers

Express XRT User Guide

61202.153L3-1

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