
186
Agere Systems Inc.
Data Sheet
May 2001
155/622/2488 Mbits/s Data Interface
TDAT042G5 SONET/SDH
Register Descriptions
(continued)
OHP Registers
(continued)
Table 85. Registers 0x0452
—
0x0469: OHP Signal Fail BER Algorithm Parameters (R/W)
Reset default of registers = 0x0000.
Notes:
OHP_SFNSSET[A
—
D][2:0] are located in registers 0x0453, 0x0455, 0x0457, and 0x0459, respectively.
OHP_SDNSCLEAR[A
—
D][2:0] are located in registers 0x045F, 0x0461, 0x0463, 0x0465, respectively.
Address
(Hex)
0452, 0454,
0456, 0458
0453, 0455,
0457, 0459
Bit #
Name
Function
Reset
Default
0x0000
15
—
0
OHP_SFNSSET
[A
—
D][18:3]
—
Signal Fail Ns Set [18:3].
Number of frames in
a monitoring block for SF.
Reserved.
This bit must be written to its reset
default value (0).
Signal Fail M Set.
Threshold of the number of
bad monitoring blocks in an observation inter-
val. If the number of bad blocks is above this
threshold, then SF (signal fail) is set. (See Table
86, page 187, for register settings in terms of
corresponding BER.)
Signal Fail L Set.
Error threshold for determin-
ing if a monitoring block is bad. (See Table 86,
page 187, for register settings in terms of corre-
sponding BER.)
15
0
14
—
7
OHP_SFMSET[A
—
D][7:0]
0000
0000
6
—
3
OHP_SFLSET[A
—
D][3:0]
0x0
2
—
0
OHP_SFNSSET[A
—
D][2:0]
Signal Fail Ns Set [2:0].
Number of frames in a
monitoring block for SF. (See Table 86, page
187, for register settings in terms of corre-
sponding BER.)
OHP_SFBSET[A
—
D][15:0]
Signal Fail B Set.
Number of monitoring
blocks. (See Table 86, page 187, for register
settings in terms of corresponding BER.)
OHP_SFNSCLEAR
[A
—
D][18:3]
in a monitoring block for SF.
—
Reserved.
This bit must be written to its reset
default value (0).
OHP_SFMCLEAR
[A
—
D][7:0]
of bad monitoring blocks in an observation
interval. If the number of bad blocks is below
this threshold, then SF (signal fail) is cleared.
OHP_SFLCLEAR
[A
—
D][3:0]
mining if a monitoring block is bad.
OHP_SFNSCLEAR
[A
—
D][2:0]
in a monitoring block for SF.
OHP_SFBCLEAR
[A
—
D][15:0]
blocks.
000
045A
—
045D 15
—
0
0x0000
045E, 0460,
0462, 0464
045F, 0461,
0463, 0465
15
—
0
Signal Fail Ns Clear [18:3].
Number of frames
0x0000
15
0
14
—
7
Signal Fail M Clear.
Threshold of the number
0x00
6
—
3
Signal Fail L Clear.
Error threshold for deter-
0x0
2
—
0
Signal Fail Ns Clear [2:0].
Number of frames
000
0466
—
0469
15
—
0
Signal Fail B Clear.
Number of monitoring
0x0000