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): 19/120頁
文件大?。?/td> 1542K
代理商: TMUX03155
Agere Systems Inc.
19
Data Sheet
April 2001
TMUX03155 STS-3/STM-1 (AU-4) Multiplexer/Demultiplexer
Transmit Direction Overview
(continued)
Monitor B1 and B2 Errors
The device verifies B1 and B2 bit interleaved parity (BIP) values on each selected STS-1/AU-3 input. The device
will count BIP errors or block errors under software control (
BITBLOCKCNT,
TLSB1ECNT[3—1][15:0],
TLSB2ECNT[3—2][15:0], TLSB2ECNT1[17:0], 0x34, Page 1 - 0x80—0x85, Page 1 - 0x86—0x88,
Page 1 - 0x89—0x8C
). These counters will update on
LATCH_CNT, 0x04
and are large enough to store at least
1 second’s worth of data.
H4 Multiframe and Pointer Monitor (AU-4 Mode Only)
In this mode, all three input signals are required to have pointer values (H1, H2) with the same fixed value of
522\D. This ensures the J1 byte starts in row 1, column 4. The H4[1:0] multiframe bits must be the same from all
inputs and equal to the internally expected value. This is required because the output STM-1 (AU-4) signal only
has one H4 byte. The device will synchronize its H4 internal expected value to a 1 after detecting an embedded
2 kHz sync in the local frame sync signal (THS(S)J0J1V1I(T/C)).
The device will declare a pointer match after two consecutive pointer values of 522\D are detected 125 μs apart. A
pointer mismatch will be declared after five
successive frames separated in time by 125 μs occur with errored
pointer values (
TLSPTRMIS[3—1]
,
TLSPTRMISD[3—1]
,
TLSPTRMISM[3—1], 0x1A, 0x09, 0x12
).
The device will declare an H4 multiframe match after two consecutive H4 values match the expected value spaced
125 μs apart. An H4 multiframe mismatch will be declared after five
successive frames separated in time by 125 μs
occur with H4 values not equal to the expected value (
TLSH4MIS[3—1]
,
TLSH4MISD[3—1]
,
TLSH4MISM[3—1], 0x1A, 0x09, 0x12
).
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