參數(shù)資料
型號: XRT73R12IB
廠商: EXAR CORP
元件分類: 數(shù)字傳輸電路
英文描述: TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
中文描述: DATACOM, PCM TRANSCEIVER, PBGA420
封裝: 35 X 35 MM, TBGA-420
文件頁數(shù): 26/87頁
文件大小: 436K
代理商: XRT73R12IB
XRT73R12
REV. P1.0.3
PRELIMINARY
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
23
3.5.3
If the level of incoming line signal drops below the threshold as described in the ITU-T G.775 standard, the
LOS condition is detected. Loss of signal is defined as no transitions for 10 to 255 consecutive zeros. No
transitions is defined as a signal level between 15 and 35 dB below the normal. This is illustrated in Figure 8.
The LOS condition is cleared within 10 to 255 UI after restoration of the incoming line signal. Figure 9 shows
the LOS declaration and clearance conditions.
E3 LOS Condition:
F
IGURE
8. L
OSS
O
F
S
IGNAL
D
EFINITION
FOR
E3
AS
PER
ITU-T G.775
F
IGURE
9. L
OSS
OF
S
IGNAL
D
EFINITION
FOR
E3
AS
PER
ITU-T G.775.
0 dB
-12 dB
-15dB
-35dB
Maximum Cable Loss for E3
LOS Signal Must be Declared
LOS Signal Must be Cleared
LOS Signal may be Cleared or Declared
Actual Occurrence
of LOS Condition
Line Signal
is Restored
Time Range for
LOS Declaration
Time Range for
LOS Clearance
G.775
Compliance
G.775
Compliance
0 UI
10 UI
0 UI
10 UI
255 UI
255 UI
RTIP/
RRing
RLOS Output Pin
相關(guān)PDF資料
PDF描述
XRT74L73 3 CHANNEL, ATM UNI/PPP DS3/E3 FRAMING CONTROLLER
XRT74L73IB 3 CHANNEL, ATM UNI/PPP DS3/E3 FRAMING CONTROLLER
XRT74L74 4 CHANNEL, ATM UNI/PPP DS3/E3 FRAMING CONTROLLER
XRT74L74IB 4 CHANNEL, ATM UNI/PPP DS3/E3 FRAMING CONTROLLER
XRT75L00D E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XRT73R12IB-F 功能描述:外圍驅(qū)動器與原件 - PCI RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
XRT73R12IB-L 功能描述:LIN 收發(fā)器 12 Channel E3/DS3/ STS-1 LIU RoHS:否 制造商:NXP Semiconductors 工作電源電壓: 電源電流: 最大工作溫度: 封裝 / 箱體:SO-8
XRT74L73 制造商:EXAR 制造商全稱:EXAR 功能描述:3 CHANNEL, ATM UNI/PPP DS3/E3 FRAMING CONTROLLER
XRT74L73IB 制造商:EXAR 制造商全稱:EXAR 功能描述:3 CHANNEL, ATM UNI/PPP DS3/E3 FRAMING CONTROLLER
XRT74L74 制造商:EXAR 制造商全稱:EXAR 功能描述:4 CHANNEL, ATM UNI/PPP DS3/E3 FRAMING CONTROLLER