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| 型號： | TMPR28051 |
| 英文描述： | TMPR28051 STS-1/AU-3 (STM-0) Mapper Device Advisory for Version 5 of the Device |
| 中文描述： | TMPR28051 STS-1/AU-3（的STM - 0）映射為版本的設(shè)備5設(shè)備咨詢 |
| 文件頁數(shù)： | 13/90頁 |
| 文件大?。?/td> | 1090K |
| 代理商： | TMPR28051 |
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Advisory, Rev. 2
August 5, 1999
TMPR28051 STS-1/AU-3 (STM-0) Mapper
Device Advisory for Version 4 of the Device
3
Lucent Technologies Inc.
VT Mapping (VT)
(continued)
VT-5. C-Bit Decoding
In the presence of a receive SONET/SDH bit error rate, the device may destuff the DS1 from the VT1.5 incorrectly.
This is the result of an error in the VT1.5 C-bit decoding process. The C-bit decoding process should be capable of
correcting single errors to the C bits. Because of this error, an error in the first or second C bit for position 2 will be
incorrectly decoded if the first C-bit position is calling for a stuff and the second C-bit position is not. The end result
of this error is that both positions will call for a stuff, resulting in a bit being removed from the DS1 data stream. This
will force downstream equipment to experience a reframe.
The minimum time to false decode severity is as shown in Table VT-5 (in terms of seconds to false decode).
Table VT-5. Minimum Time (in Seconds) to
False Decode Severity of the C Bit
In the absence of an external bit error rate, the algorithm decodes these C bits correctly.
Device Version (DV)
DV-1. Device Version Report
The device version register, 0x16, reports the device version as 0x03.
AY99-028SONT-2 Replaces AY99-028SONT to Incorporate the Following Updates
Added issues RA-5 and E1-3 to the document.
BER
Theoretical
Actual
10
–3
125
0.25
10
–4
12500
2.5
10
–5
1250000
25
10
–6
1.25e+8
250
10
–7
1.25e+10
2500
10
–8
1.25e+12
2.5e+4
10
–9
1.25e+14
2.5e+5
10
–10
1.25e+16
2.5e+6
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| TMPR28051-3-SL5 | 制造商:AGERE 制造商全稱:AGERE 功能描述:TMPR28051 STS-1/AU-3 (STM-0) Mapper Device Advisory for Version 5 of the Device |
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| TMPR3907F | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MICROPROCESSOR|32-BIT|CMOS|QFP|208PIN|PLASTIC |
| TMPR3911 | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:32-Bit TX System RISC TX39 Family |
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