參數(shù)資料
型號(hào)： T7230A
廠商： Lineage Power
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(yè)數(shù)： 38/110頁(yè)
文件大小： 752K
代理商： T7230A
Preliminary Data Sheet
T7230A Primary Access Framer/Controller
June 1997
34
Lucent Technologies Inc.
Frame Formats
(continued)
CEPT Loss of Basic Frame Alignment (LFA)
(continued)
In the LFA state:
1. No additional FAS or NOT FAS errors are processed.
2. The received remote frame alarm (received A-bit) is deactivated.
3. All NOT-FAS bit (Si bit, A bit and Sa4 to Sa8 bits) processing is halted.
4. Receive Sa6 status bits are set to 0.
5. Receive Sa6 code monitoring and counting is halted.
6. RFD = 1 and RFCK maintains previous alignment.
7. Optionally, the remote alarm indication (A = 1) may be automatically transmitted to the line.
8. Optionally, the alarm indication signal (AIS) may be automatically transmitted to the system.
9. If CRC-4 is enabled, loss of CRC-4 multiframe alignment is forced.
10. If CRC-4 is enabled, the monitoring and processing of CRC-4 checksum errors is halted.
11. If CRC-4 is enabled, all monitoring and processing of received E-bit information is halted.
12. If CRC-4 is enabled, deactivate the receive continuous E-bit alarm, i.e., force CREB = 0.
13. If CRC-4 is enabled, optionally, E = 0 is transmitted to the line for the duration of loss of CRC-4 multiframe
alignment.
14. If channel associated or common channel signaling is enabled, loss of the signaling multiframe alignment is
forced.
15. If channel associated or common channel signaling is enabled, updating of the signaling data is halted.
CEPT Loss of Frame Alignment Recovery Algorithm
As defined in ITU Rec. G.706.4.1.2, frame alignment will be assumed to have been recovered when the following
sequence is detected:
1.
For the first time, the presence of the correct frame alignment signal in frame n.
2.
The absence of the frame alignment signal in the following frame detected by verifying that bit 2 of the basic
frame is a 1 in frame n + 1.
3.
For the second time, the presence of the correct frame alignment in the next frame, n + 2.
Failure to meet 2 or 3 above will initiate a new basic frame search in frame n +2.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
T-7230A--ML 制造商:Rochester Electronics LLC 功能描述:- Bulk
T7230-ML3 制造商:AGERE 功能描述:
T7-231A1 功能描述:撥動(dòng)開(kāi)關(guān) ON NONE OFF 2 Pole Standard Bat Handle RoHS:否 制造商:OTTO 觸點(diǎn)形式: 開(kāi)關(guān)功能: 電流額定值: 電壓額定值 AC: 電壓額定值 DC: 功率額定值: 端接類型: 安裝風(fēng)格: 端子密封: 觸點(diǎn)電鍍: 照明:
T7-231A2 制造商:OTTO Engineering Inc 功能描述:2POLE, SOLDER, STD,
T7-231A2D 功能描述:撥動(dòng)開(kāi)關(guān) ON NONE OFF 2 Pole Standard LeverLock RoHS:否 制造商:OTTO 觸點(diǎn)形式: 開(kāi)關(guān)功能: 電流額定值: 電壓額定值 AC: 電壓額定值 DC: 功率額定值: 端接類型: 安裝風(fēng)格: 端子密封: 觸點(diǎn)電鍍: 照明:
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