參數(shù)資料
型號(hào): XRT75R06DIB
廠(chǎng)商: Exar Corporation
文件頁(yè)數(shù): 74/105頁(yè)
文件大?。?/td> 0K
描述: IC LIU E3/DS3/STS-1 6CH 217BGA
標(biāo)準(zhǔn)包裝: 126
類(lèi)型: 線(xiàn)路接口裝置(LIU)
驅(qū)動(dòng)器/接收器數(shù): 6/6
規(guī)程: DS3,E3,STS-1
電源電壓: 3.135 V ~ 3.465 V
安裝類(lèi)型: 表面貼裝
封裝/外殼: 217-BBGA
供應(yīng)商設(shè)備封裝: 217-BGA(23x23)
包裝: 托盤(pán)
XRT75R06D
á
REV. 1.0.0
SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
65
Figure 45 was copied directly out of Telcordia GR-253-CORE. However, this figure can be simplified and
redrawn as depicted below in Figure 46.
FIGURE 45. AN ILLUSTRATION OF TELCORDIA GR-253-CORE'S RECOMMENDATION ON HOW MAP DS3 DATA INTO
AN
STS-1 SPE
FIGURE 46. A SIMPLIFIED "BIT-ORIENTED" VERSION OF TELCORDIA GR-253-CORE'S RECOMMENDATION ON HOW
TO MAP
DS3 DATA INTO AN STS-1 SPE
For DS3 Mapping, the STS-1 SPE has the following structure.
25I
I
C3
R
25I
I
C2
R
25I
C1
R
25I
I
C3
R
25I
I
C2
R
25I
C1
R
25I
I
C3
R
25I
I
C2
R
25I
C1
R
25I
I
C3
R
25I
I
C2
R
25I
C1
R
25I
I
C3
R
25I
I
C2
R
25I
C1
R
25I
I
C3
R
25I
I
C2
R
25I
C1
R
25I
I
C3
R
25I
I
C2
R
25I
C1
R
25I
I
C3
R
25I
I
C2
R
25I
C1
R
25I
I
C3
R
25I
I
C2
R
25I
C1
R
POH
87 bytes
R = [r, r, r, r, r, r, r, r]
I = [i, i, i, i, i, i, i, i]
C1 = [r, r, c, i, i, i, i, i]
C2 = [c, c, r, r, r, r, r, r]
C3 = [c, c, r, r, o, o, r, s]
i = DS3 data
r = fixed stuff bit
c = stuff control bit
s = stuff opportunity bit
o = overhead communications channel bit
Fixed
Stuff
208i
s
1r
2o
2r
2c
16r
208i
6r
2c
16r
205i
c
18r
208i
s
1r
2o
2r
2c
16r
208i
6r
2c
16r
205i
c
18r
208i
s
1r
2o
2r
2c
16r
208i
6r
2c
16r
205i
c
18r
208i
s
1r
2o
2r
2c
16r
208i
6r
2c
16r
205i
c
18r
208i
s
1r
2o
2r
2c
16r
208i
6r
2c
16r
205i
c
18r
208i
s
1r
2o
2r
2c
16r
208i
6r
2c
16r
205i
c
18r
208i
s
1r
2o
2r
2c
16r
208i
6r
2c
16r
205i
c
18r
208i
s
1r
2o
2r
2c
16r
208i
6r
2c
16r
205i
c
18r
208i
s
1r
2o
2r
2c
16r
208i
6r
2c
16r
205i
c
18r
r
c
s
i
o
- Fixed Stuff Bits
- Stuff Control/Indicator Bits
- DS3 Data Bits
- Stuff Opportunity Bits
- Overhead Communication Bits
POH
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