NEC Univerge SV8500 Operation And Maintenance Manual page 460

3
Day/Night Mode Specification
b7 b6 b5 b4 b3
4
External Switch Status
b7 b6 b5 b4 b3
b0-b3: Mode after changing
b4-b7: Mode before changing
b2 b1 b0
b0 b1 b2 b3
b4 b5 b6 b7
0
0
0
0
Note:
b0-b7:
b2 b1 b0
0 0 0 Day Mode
0 0 1 Night Mode 1
0 1 0 Night Mode 2 available only for Japan
0 1 1 Night Mode 3 (DIT-Night Connection Fixed) Note
This data is programmed as initial data.
01=Not used
02=Day/Night Change
03=Not used
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CHAPTER 3 System Messages
MEANING