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参数资料
| 型号： | XRT75VL00D |
| 厂商： | Exar Corporation |
| 英文描述： | E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER |
| 中文描述： | E3/DS3/STS-1线路接口单元与SONET DESYNCHRONIZER |
| 文件页数： | 55/92页 |
| 文件大小： | 836K |
| 代理商： | XRT75VL00D |
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XRT75VL00D
REV. 1.0.3
E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
54
In general, the role/purpose of the POH bytes is to fulfill the following functions.
To support error detection within the STS-1 SPE
To support the transmission of various alarm conditions such as RDI-P (Path - Remote Defect Indicator) and
REI-P (Path - Remote Error Indicator)
To support the transmission and reception of "Path Trace" Messages
The role of the POH bytes is beyond the scope of this data sheet and will not be discussed any further.
9.2.1.2
Mapping DS3 data into an STS-1 SPE
Now that we have defined the STS-1 SPE, we can now describe how a DS3 signal is mapped into an STS-1
SPE. As mentioned above, the STS-1 SPE is basically an 87 byte column x 9 row structure of data. The very
first byte column (e.g., in all 9 bytes) consists of the POH (Path Overhead) bytes. All of the remaining bytes
within the STS-1 SPE is simply referred to as "user" or "payload" data because this is the portion of the STS-1
signal that is used to transport "user data" from one end of the SONET network to the other. Telcordia GR-253-
CORE specifies the approach that one must use to asynchronously map DS3 data into an STS-1 SPE. In
short, this approach is presented below in Figure 36.
FIGURE 35. ILLUSTRATION OF THE BYTE STRUCTURE OF THE STS-1 SPE
Z5
Z4
Z3
H4
F2
G1
C2
B3
J1
Payload (or User) Data
86 Bytes
1 Byte
87 Bytes
9 Rows
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| XRT83SL34IV | QUAD T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR |
| XRT83SL34 | QUAD T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR |
| XS2F-A422-90-A | 4 CONTACT(S), POLYBUTYLENE TEREPHTHALATE, FEMALE, CIRCULAR CONNECTOR, CLAMP, SOCKET |
| XS2F-A422-A90-A | 4 CONTACT(S), POLYBUTYLENE TEREPHTHALATE, FEMALE, CIRCULAR CONNECTOR, CLAMP, SOCKET |
| XS2F-A422-AB0-A | 4 CONTACT(S), POLYBUTYLENE TEREPHTHALATE, FEMALE, CIRCULAR CONNECTOR, CLAMP, SOCKET |
相关代理商/技术参数 |
参数描述 |
|---|---|
| XRT75VL00D_08 | 制造商:EXAR 制造商全称:EXAR 功能描述:E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET |
| XRT75VL00D1V-F | 制造商:Exar Corporation 功能描述: |
| XRT75VL00DES | 功能描述:时钟合成器/抖动清除器 1CHT3/E3/STS1LIU+ DESYNC 3.3V DRV VER RoHS:否 制造商:Skyworks Solutions, Inc. 输出端数量: 输出电平: 最大输出频率: 输入电平: 最大输入频率:6.1 GHz 电源电压-最大:3.3 V 电源电压-最小:2.7 V 封装 / 箱体:TSSOP-28 封装:Reel |
| XRT75VL00DIV | 功能描述:时钟合成器/抖动清除器 3.3V 1 CH E3/DS3/STS W/SONET DE-SYNCH RoHS:否 制造商:Skyworks Solutions, Inc. 输出端数量: 输出电平: 最大输出频率: 输入电平: 最大输入频率:6.1 GHz 电源电压-最大:3.3 V 电源电压-最小:2.7 V 封装 / 箱体:TSSOP-28 封装:Reel |
| XRT75VL00DIV-F | 功能描述:时钟合成器/抖动清除器 3.3V 1 CH E3/DS3/STS W/SONET DE-SYNCH RoHS:否 制造商:Skyworks Solutions, Inc. 输出端数量: 输出电平: 最大输出频率: 输入电平: 最大输入频率:6.1 GHz 电源电压-最大:3.3 V 电源电压-最小:2.7 V 封装 / 箱体:TSSOP-28 封装:Reel |
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