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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