NEC Univerge SV8500 Operation And Maintenance Manual page 326

(c) FS = 2, FE = 0
2
SMDR Group number
b7 b3
3
Port number
b7 b6 b5 b4 b3
(d) FS = 3, FE = 0
2
b7 b3
b0-b3: SMDR Group number to which failure occurred
b2 b1 b0
b0-b7: Port number allocated for SMDR Group to which failure occurred
b2 b1 b0
b0-b3: SMDR Group number to which failure occurred
b2 b1 b0
(0-7)
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CHAPTER 3 System Messages