參數(shù)資料
型號: XRT86VL3X
廠商: Exar Corporation
元件分類: 通信及網(wǎng)絡(luò)
英文描述: Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
中文描述: Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
文件頁數(shù): 80/149頁
文件大?。?/td> 1274K
代理商: XRT86VL3X
XRT86VL3X
73
T1/E1/J1 FRAMER/LIU COMBO - ARCHITECTURE DESCRIPTION
REV. 1.2.0
channels are sent, it comes the second bit of Timeslot 0 of Channel 0 and so on. The table below demon-
strates how payload bits of four channels are mapped into the 12.352Mbit/s data stream.
X
Y
: The Xth payload bit of Channel Y
3.
The local Terminal Equipment also multiplexes signaling bits with payload bits and sends them together
through the 12.352Mbit/s data stream. When the Terminal Equipment is sending the fifth payload bit of
each channel, instead of sending it twice, it inserts the signaling bit A of that corresponding channel. Simi-
larly, the sixth payload bit of a each channel is followed by the signaling bit B of that channel; the seventh
payload bit is followed by the signaling bit C; the eighth payload bit is followed by the signaling bit D.
The following table illustrates how payload bits and signaling bits are multiplexed together into the 12.352Mbit/
s data stream.
X
Y
: The Xth payload bit of Channel Y
A
Y
: The signaling bit A of Channel Y
4.
Following the same rules of Step 2 and 3, the local Terminal Equipment continues to map the payload data
and signaling data of four channels into a 12.352Mbit/s data stream.
B
IT
0
B
IT
1
B
IT
2
B
IT
3
B
IT
4
B
IT
5
B
IT
6
B
IT
7
1
0
1
0
1
1
1
1
1
2
1
2
1
3
1
3
B
IT
0
B
IT
1
B
IT
2
B
IT
3
B
IT
4
B
IT
5
B
IT
6
B
IT
7
2
0
2
0
2
1
2
1
2
2
2
2
2
3
2
3
B
IT
0
B
IT
1
B
IT
2
B
IT
3
B
IT
4
B
IT
5
B
IT
6
B
IT
7
5
0
A
0
5
1
A
1
5
2
A
2
5
3
A
3
B
IT
0
B
IT
1
B
IT
2
B
IT
3
B
IT
4
B
IT
5
B
IT
6
B
IT
7
6
0
B
0
6
1
B
1
6
2
B
2
6
3
B
3
B
IT
0
B
IT
1
B
IT
2
B
IT
3
B
IT
4
B
IT
5
B
IT
6
B
IT
7
7
0
C
0
7
1
C
1
7
2
C
2
7
3
C
3
B
IT
0
B
IT
1
B
IT
2
B
IT
3
B
IT
4
B
IT
5
B
IT
6
B
IT
7
8
0
D
0
8
1
D
1
8
2
D
2
8
3
D
3
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