參數(shù)資料
型號: DS3160
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): 57/107頁
文件大?。?/td> 592K
代理商: DS3160
DS3160
57 of 107
Bit 8/Remote-End Alarm Detected (READ)
0 = interrupt masked
1 = interrupt unmasked
Bit 9/False-Frame Alignment (FFA)
0 = interrupt masked
1 = interrupt unmasked
Table 5.3A. ALARM CRITERIA
CRITERIA
ALARM/
CONDITION
DESCRIPTION
SET
CLEAR
AIS
Alarm Indication
Signal
Two or fewer “0” among the four
frames received.
Three or more “0” among the
four frames received.
ALTAIS
Alternate Alarm
Indication Signal
One or fewer “0” among 96 frames
(75,744 bits) received.
Two or more “0” among 96
frames (75,744 bits) received.
LOS
Loss of Signal
User-selectable threshold of 15,
31, 63, or 255 consecutive “0.”
No excessive 0 (EXZ) events
over the selected threshold that
starts with the first “1”
received.
Reception of three or more
consecutive multiframes with
correct FAS patterns.
LOF
Loss of Frame
Reception of seven or more
consecutive multiframes with
erred frame alignment signal
(FAS).
Alternately, if CRC5FM is
enabled, frame synchronization
is declared after two or more of
the first four FAS valid frames
have correct CRC-5 check bits.
When a pattern other than
“1111111100000000” is
detected four times or more
consecutively on the M-bit in
the received frames.
RAI
Remote Alarm
Indication
Detection of “1111111100000000”
pattern for 16 times or more
continuously on the M-bit of the
received frames.
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