NEC Univerge SV8500 Operation And Maintenance Manual page 466

4
Changeover Information
b7 b3
5
Status of the Primary/Back-up Dch
b7 b5 b4 b3
6
EVENT number
b7 b6 b5 b4 b3
b0, b1:
b2 b1 b0
b2, b3:
b0-b2: Status of Primary Dch
b2 b1 b0
b3-b5: Status of Primary Dch
b0-b7: EVENT number
b2 b1 b0
00 = Change from Primary Dch to Dch for Back-up
01 = Change from Dch for Back-up to Primary Dch
10 = Place Primary Dch to ACT status
11 = Place Dch for Back-up to ACT status
00 = Change signal is received
01 = Change signal is sent
0 = In Service
1 = Standby
2 = Out of Service
3 = Make-Busy
4 = Changing status from STBY to In Service
5 = Manual Out of Service
0 = In Service
1 = Standby
2 = Out of Service
3 = Make-Busy
4 = Changing status from STBY to In Service
5 = Manual Out of Service
– 419 –
CHAPTER 3 System Messages