
58
Agere Systems Inc.
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)
Overhead (OH) Extract.
All transport overhead (TOH) bytes are extracted and sent over the RxTOH interface for
possible external processing. The number of bits sent are as follows:
I
STS-3/STM-1: 5,184,000 bits/s per interface
I
STS-12/STM-4: 20,736,000 bits/s per interface
I
STS-48/STM-16: 82,944,000 bits/s (over 4 serial lines (20,736 kbits/s each))
Table 17. Ns, L, M, and B Values to Clear 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
Clearing
SF/SD (%)
Integra-
tion
Time
(s)
Max-
imum
Number
of Frames
Ns
*
L
*
M
*
B
*
@BER*5
@BER
@BER*5
@BER
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
30
—
6
2
2
2
2
2
2
—
3
3
3
3
4
3
2
—
7
7
7
7
9
9
F
—
8
48
384
3840
47250
465000
4160000
—
—
0.39
11.33
6.84
6.84
6.59
6.35
1.48
—
0.27
0.01
0.34
0.34
0.22
0.03
0.50
—
—
—
104
800
8000
80000
664000
5336000
53360000
85.13
93.01
84.42
84.42
83.66
82.86
46.31
100.00
99.21
99.88
99.88
99.98
99.75
99.84
0.013
0.1
1
10
83
667
6670
1E05
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
—
1
2
D
80
4FB
31CE
1F20C
—
7
2
2
2
2
2
2
—
6
8
3
3
3
3
3
—
6
A
8
8
8
8
8
—
7
22
117
1152
11475
114750
1147500
—
—
—
0.00
0.07
0.02
0.02
0.03
0.03
0.03
—
—
—
64
200
2000
20000
168000
1336000
13360000
100.00
98.36
87.99
87.34
87.17
87.17
87.17
51.54
20.51
8.23
7.94
7.87
7.87
7.87
99.03
100.00
99.59
99.64
99.65
99.65
99.65
0.008
0.025
0.25
2.5
21
167
1670
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
—
2
3
2
2
2
2
—
D
D
6
6
6
4
—
E
3F
13
13
13
A
—
64
15
320
640
6280
62000
333300
—
—
—
0.00
0.00
0.00
0.00
0.00
0.00
0.03
—
—
—
64
64
500
5000
41600
336000
3360000
100.00
100.00
95.07
87.34
86.52
85.95
84.89
45.99
60.11
7.28
7.94
7.61
7.38
7.00
99.42
99.47
99.98
99.94
99.95
99.96
99.95
0.008
0.008
0.0625
0.625
5.2
42
420