ADTRAN XRT - Manual (Page 65)

61200.153L1-13 Express XR/XRT Quick Start Guide 53
Appendix A. AT Commands and S-Registers
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
Changing a String S-Register
Type ATSS followed by the number of the string S-register to be
changed, an equal sign, the numeric string to be assigned to the
register, then press Enter.
ATSS80=5551212
Dialing a Call using the AT Command Processor
To dial a call using the DTE terminal and AT commands type
ATD, ATDT,
or ATDP and the telephone number on one line
and press Enter.
ATD5551212
To end an active call with the AT command processor press the
break in key sequence +++ or the redefined key then type ATH
and press Enter to hang up the line.