
Agere Systems Inc.
57
Data Sheet
May 2001
155/622/2488 Mbits/s Data Interface
TDAT042G5 SONET/SDH
Functional Description
(continued)
Overhead Processor (OHP) Block
(continued)
Receive OHP
(continued)
Table 16 and Table 17 show values of Ns, L, M, and B for STS-3/STM-1, STS-12/STM-4, and STS-48/STM-16 to
set and clear the BER indicator. SF registers are 0x0452
—
0x0469 and SD registers are 0x043A
—
0x0451. All
SF/SD set and clear values are hexadecimal.
Table 16. Ns, L, M, and B Values to Set the BER Indicator
* These are the numbers to be provisioned in TDAT042G5. The actual values of the BER algorithm are 1 greater than the actual values shown.
These BER values cannot be provisioned because the maximum value of L is 0xF (i.e., L is a 4-bit register).
Mode
BER
SF/SD Set Values
Actual
Number of
Frames
Probability of
Detecting L
Errors (%)
Probability of
Declaring
SF/SD (%)
Integra-
tion
Time
(s)
Max-
imum
Number
of Frames
Ns
*
L
*
M
*
B
*
@BER
@BER
/2
@BER
@BER
/2
STS-3/
STM-1
1.00E-03
1.00E-04
1.00E-05
1.00E-06
1.00E-07
1.00E-08
1.00E-09
1.00E-10
1
6
6
9
7
7
7
7
4
—
3D
3
3
3
4
3
5
—
3D
7
7
7
9
9
F
—
62
48
384
3840
47250
465000
4160000
—
99.96
72.70
71.34
71.34
69.74
68.07
56.90
—
85.13
7.28
10.08
10.09
9.44
8.82
11.25
—
97.68
96.06
95.19
95.19
95.07
98.47
96.52
—
0.00
0.16
0.52
0.52
0.13
0.82
0.60
—
0.008
0.013
0.1
1
10
83
667
—
64
104
800
8000
80000
664000
5336000
—
30
1E0
1275
B5A4
3F7A0
—
STS-12/
STM-4
1.00E-03
1.00E-04
1.00E-05
1.00E-06
1.00E-07
1.00E-08
1.00E-09
1.00E-10
—
2
D
80
4FB
31CE
1F20C
—
—
B
8
8
8
8
8
—
—
6
3
3
3
3
3
—
—
A
8
8
8
8
8
—
64
22
117
1152
11475
114750
1147500
—
100.00
84.92
67.93
66.19
65.75
65.75
65.75
—
88.43
9.64
7.17
6.66
6.53
6.53
6.53
—
100.00
98.38
96.48
95.46
95.16
95.16
95.16
—
0.04
0.00
0.25
0.19
0.18
0.18
0.18
—
0.008
0.008
0.025
0.25
2.5
21
167
—
64
64
200
2000
20000
168000
1336000
—
STS-48/
STM-16
1.00E-03
1.00E-04
1.00E-05
1.00E-06
1.00E-07
1.00E-08
1.00E-09
1.00E-10
—
1
5
20
13A
C1C
765C
—
—
E
A
7
7
7
6
—
—
3F
35
8
8
7
6
—
—
3F
3F
E
E
E
A
—
64
64
320
480
4710
46500
333300
—
100.00
99.95
90.60
77.55
75.80
74.58
82.92
—
100.00
58.97
16.25
13.09
12.15
11.54
19.71
—
100.00
96.89
96.47
96.69
95.17
98.09
97.29
—
100.00
0.00
0.00
0.00
0.00
0.01
0.18
—
0.008
0.008
0.008
0.0625
0.625
5.2
42
—
64
64
64
500
5000
41600
336000
—