參數(shù)資料
型號: XRT75R06DIB
廠商: Exar Corporation
文件頁數(shù): 70/105頁
文件大?。?/td> 0K
描述: IC LIU E3/DS3/STS-1 6CH 217BGA
標(biāo)準(zhǔn)包裝: 126
類型: 線路接口裝置(LIU)
驅(qū)動器/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
á
XRT75R06D
SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
REV. 1.0.0
62
In general, the role/purpose of the TOH bytes is to fulfill the following functions.
To support STS-1 Frame Synchronization
To support Error Detection within the STS-1 frame
To support the transmission of various alarm conditions such as RDI-L (Line - Remote Defect Indicator) and
REI-L (Line - Remote Error Indicator)
To support the Transmission and Reception of "Section Trace" Messages
To support the Transmission and Reception of OAM&P Messages via the DCC Bytes (Data Communication
Channel bytes - D1 through D12 byte)
The roles of most of the TOH bytes is beyond the scope of this Data Sheet and will not be discussed any
further. However, there are a three TOH bytes that are important from the stand-point of this data sheet, and
will discussed in considerable detail throughout this document. These are the H1 and H2 (e.g., the SPE
Pointer) bytes and the H3 (e.g., the Pointer Action) byte.
Figure 43 presents an illustration of the Byte-Format of the TOH within an STS-1 Frame, with the H1, H2 and
H3 bytes highlighted.
FIGURE 42. THE BYTE-FORMAT OF THE TOH WITHIN AN STS-1 FRAME
A1
B1
D1
H1
B2
D4
S1
D10
D7
C1
F1
D3
H3
K2
D6
E2
D12
D9
A2
E1
D2
H2
K1
D5
M0
D11
D8
Envelope Capacity
Bytes
Envelope Capacity
Bytes
3 Byte Columns
87 Byte Columns
9 Rows
The TOH Bytes
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