APPENDIX B: S-REGISTERS
DEFINITY Communications System
7400B Data Module
Page B-10
User’s Guide
Register:
S16
Description:
This S-register stores test function status in a bit-mapped format as
follows:
bit 0 — local digital loop test; 0 = test disabled, 1 = test in progress
(default = 0, see the
&T1
and
&T2
commands)
bit 1 — not used (always set to 0)
bit 2 — local data loop test; 0 = disabled, 1 = test in progress
(default = 0, see
&T3
command)
bit 3 — status bit for remote digital loop initiated by remote system;
0 = off, 1 = in progress (default = 0, see
&T4
and
&T5
commands)
bit 4 — remote digital loop; 0 = disabled, 1 = in progress (default = 0,
see
&T6
command)
bit 5 — remote digital loop with self-test 0 = disabled, 1 = in
progress (default = 0, see
&T7
command)
bit 6 — local digital loop with self-test; 0 = disabled, 1 = in progress
(default = 0, see
&T8
command)
bit 7 — not used (always set to 0)
Range of
Values:
Storable:
Comments:
Value may be 00 to FF hexadecimal; factory-default settings produce a
value of 00 (see comment 1).
no
1 .
Only one of the tests may be in progress at any time. The
T0
command terminates any locally initiated test in progress and
sets S-register 16 to 00.
Refer to the explanation of hexadecimal values under the Range
of Values label description at the beginning of this appendix.
2 .
See Also:
Chapter 4, “Operation and Configuration”; refer to the indicated AT
command in Appendix A, “AT Command Set.”
Register:
S17
— not used
