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
文件頁數(shù)： 43/110頁
文件大小： 752K
代理商： T7230A
Preliminary Data Sheet
June 1997
T7230A Primary Access Framer/Controller
39
Lucent Technologies Inc.
Frame Formats
(continued)
CEPT Loss of CRC-4 Multiframe Alignment Recovery Algorithms
(continued)
5-3909(F)r.7
Figure 10. Receive CRC-4 Multiframe Search Algorithm Using the 100 ms Internal Timer
SET E BITS ACCORDING TO ITU REC. G.704, SECTION 2.3.3.4
OUT OF PRIMARY BFA:
DISABLE TRAFFIC BY TRANSMITTING AIS TO THE SYSTEM
OPTIONALLY TRANSMIT A = 1 AND E = 0 TO LINE
INHIBIT INCOMING CRC-4 PERFORMANCE MONITORING
BFA SEARCH
IN PRIMARY BFA:
ENABLE TRAFFIC TO THE SYSTEM
TRANSMIT A = 0 AND OPTIONALLY E = 0 TO THE LINE
START 8 ms AND 100 ms TIMERS
ENABLE PRIMARY BFA LOSS CHECKING PROCESS
CRC-4 MFA SEARCH (ITU REC. G.706, SECTION 4.2 - NOTE 2)
CAN CRC-4
MFA BE FOUND
IN 8 ms
PARALLEL
BFA SEARCH
GOOD
100 ms
TIMER
ELAPSED
YES
NO
NO
NO
YES
YES
ASSUME CRC-4 MULTIFRAME ALIGNMENT:
CONFIRM PRIMARY BFA ASSOCIATED WITH CRC-4 MFA
ADJUST PRIMARY BFA IF NECESSARY
SET 100 ms TIMER EXPIRATION STATUS BIT TO THE 1 STATE:
SET INTERNAL 100 ms TIMER EXPIRATION STATUS BIT TO 1:
OPTIONALLY TRANSMIT A BIT = 1 TO THE LINE INTERFACE FOR
THE DURATION OF LMFA = 1
OPTIONALLY TRANSMIT AIS TO THE SYSTEM INTERFACE FOR THE
DURATION OF LMFA = 1
START CRC-4 PERFORMANCE MONITORING:
SET E BITS ACCORDING TO ITU REC. G.704, SECTION 2.3.3.4
CRC-4
COUNT > 914
IN 1s OR
LFA = 1
CONTINUE CRC-4 PERFORMANCE MONITORING:
YES
YES
NO
NO
IS 100 ms TRX = 1
YES
NO
SET INTERNAL 100 ms TIMER EXPIRATION STATUS BIT TO 0:
IF XA100 BIT = 1 TO THE LINE INTERFACE, TRANSMIT A BIT = 0
IF TRANSMITTING AIS TO THE SYSTEM INTERFACE, ENABLE DATA
TRANSMISSION TO THE SYSTEM INTERFACE
IS
YES
NO
100 ms TRX = 1
INTERNAL
PRIMARY
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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)開關(guān) ON NONE OFF 2 Pole Standard Bat Handle RoHS:否 制造商:OTTO 觸點(diǎn)形式: 開關(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)開關(guān) ON NONE OFF 2 Pole Standard LeverLock RoHS:否 制造商:OTTO 觸點(diǎn)形式: 開關(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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