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參數(shù)資料
| 型號： | STS1FRM |
| 元件分類： | 通信、網(wǎng)絡(luò)模塊及開發(fā)工具 |
| 英文描述： | Telecomm/Datacomm |
| 中文描述： | 電信/數(shù)據(jù)通信 |
| 文件頁數(shù)： | 2/6頁 |
| 文件大?。?/td> | 157K |
| 代理商： | STS1FRM |
2
Altera Corporation
SONET STS-1 Framer MegaCore Function (STS1FRM) Data Sheet
The STS1FRM complies with all applicable standards, including:
–
American National Standards Institute (ANSI),
Synchronous
Optical Network (SONET) –Basic Description including Multiplex
Structure, Rates, and Formats, ANSI T1-105–
1995
.
American National Standards Institute (ANSI),
Synchronous
Optical Network (SONET) –Payload Mappings, ANSI T1-105.02–
1995
.
Telcordia,
Synchronous Optical Network (SONET) Transport
Systems: Common Generic Criteria, GR-253-CORE,
Issue 3,
September 2000.
Telcordia,
Synchronous Optical Network (SONET) Transport
Systems: Common Generic Criteria Issue List Report, GR-253-ILR,
Issue 3A, October 2000.
–
–
–
Functional
Description
The STS1FRM operates in full-duplex mode, and comprises four blocks, as
illustrated in
Figure 2
.
The following list of functions is based on a full-feature
STS1FRM. See
Table 2
for all possible options.
I
Transport overhead receiver (RXTOH)
–
Inputs raw SONET data
–
Descrambles the data
–
Performs frame alignment
–
Performs error checking
–
Maintains counters and buffers
–
Captures the TOH bytes for processing by software, and
parameterized hardware extraction
I
Path overhead receiver (RXPOH_0)
–
Processes the pointer
–
Performs error checking
–
Maintains counters and buffers
–
Captures the POH bytes for processing by software, and
parameterized hardware extraction
–
Outputs payload data
I
Transport overhead transmitter (TXTOH)
–
Generates the pointer (normal, positive stuff, negative stuff, or
new data flag (NDF) selected by software)
–
Allows the flexible insertion of the TOH by software, or by
parameterized hardware
–
Generates parity bytes
–
Maintains counters and buffers
–
Scrambles the data
–
Outputs raw SONET data
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