AT&T 7400B Plus User Manual page 160

APPENDIX C: S-REGISTERS
Page C-4
Register:
Description:
Range of
Values:
Storable:
Comments:
See Also:
Register:
Description:
Range of
Values:
Storable:
Comments:
See Also:
S0
The value in this S-register represents the ring number on which
an incoming call will be automatically answered.
The value may be 000 through 255 rings. The factory-default
setting is 000 rings.
yes
Setting S-register S0 to any value from 001 through 255 enables
automatic answer; a value of 000 disables automatic answering.
The count of incoming rings is stored in S-register S1.
Chapter 3, "Configuration and Operation"; S-register S1.
S1
The number of incoming rings detected. Incremented each time
a ring is detected. It is cleared if no rings are detected for eight
seconds.
The value may be 000 through 255 rings. The factory-default
setting is 000 rings.
no
In the 7400B Plus, incoming rings are not detected as such. The
PBX notifies the 7400B Plus of an incoming call and a ring cycle
(RI lead) is generated internally. The register is incremented
after each ring cycle.
Chapter 3, "Configuration and Operation"; S-register S0.
DEFINITY Communications System
7400B Plus Data Module
User´s Guide