參數(shù)資料
型號: TMUX03155
英文描述: TMUX03155 STS-3/STM-1 (AU-4) Multiplexer/Demultiplexer
中文描述: TMUX03155 STS-3/STM-1(非盟- 4)復用器/解復用器
文件頁數(shù): 26/120頁
文件大?。?/td> 1542K
代理商: TMUX03155
26
Agere Systems Inc.
Data Sheet
April 2001
TMUX03155 STS-3/STM-1 (AU-4) Multiplexer/Demultiplexer
Receive Direction Overview
(continued)
Data Demultiplex and Conversion (AU-4 Mode Only)
The device will demultiplex the STS-3/STM-1 (AU-4) signal into three STS-1/AU-3 signals, respectively. In the
AU-4 mode, a conversion between the AU-4 payload format and the AU-3 payload format is performed. This
requires the location of the J1 byte to be known, while this is not the case in the STS-3 mode, where the high-
speed signal is byte demultiplexed and no format conversion occurs.
STS-1/AU-3 Output Byte Control
The output overhead bytes are controlled in one of four ways:
1. Errors can be inserted.
2. Values from the high-speed STS-3/STM-1 signal can be copied or set to the byte default.
3. Values can be inserted under software control.
4. Values can be inserted under hardware control.
Table 9 specifies the specific control allowed for each overhead byte. Table 18 in the Maintenance Functions sec-
tion provides details for selecting each control mode.
1.Error insert.
2.Input pass or default value.
3.Software overwrite.
4.Copy of the selected byte from the incoming STM-1 (AU-4) frame; otherwise, the bytes pass without being changed
(POH can start anywhere within the SPE).
5.Hardware overwrite.
Note:
X = don’t care (payload).
B1 and B2 Generate
The B1 and B2 values of the outgoing STS-1/AU-3 signal are calculated. An error can be inserted into the B1 and
B2 values on a per STS-1/AU-3 basis (
RB1ERRINS[3—1], RB2ERRINS[3—1], 0x63
).
Table 9. STS-1/AU-3 Format and Overhead Control Summary
Transport Overhead
Payload
Col. 1
Col. 2
Col. 3
Col. 4
Col. 5—90
Row 1
Row 2
Row 3
Row 4
Row 5
Row 6
Row 7
Row 8
Row 9
A1
B1
1
D1
2
H1
1, 4
B2
1
D4
2
D7
2
D10
2
S1
2
A2
1
E1
2
D2
2
H2
1, 4
K1
1, 3
D5
2
D8
2
D11
2
M0
1, 5
J0
3
F1
2, 3
D3
2
H3
4
K2
1, 3
D6
2
D9
2
D12
2
E2
2
J1
4
B3
C2
4
G1
4
F2
4
H4
4
Z3
4
Z4
Z5
4
X
X
X
X
X
X
X
X
X
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