參數(shù)資料
型號(hào)： XRT86VL3X
廠商： Exar Corporation
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)： 112/149頁
文件大?。?/td> 1274K
代理商： XRT86VL3X
XRT86VL3X
105
T1/E1/J1 FRAMER/LIU COMBO - ARCHITECTURE DESCRIPTION
REV. 1.2.0
8.6.2
How to configure the framer to generate Red Alarm
Upon detection of Loss of Signal (LOS) or Loss of Frame (LOF) condition, the Repeater will generate an
internal Red Alarm when enabled. This alarm will normally trigger a microprocessor interrupt informing the user
that an incoming signal failure is happening.
The Loss of Frame Declaration Enable bit of the Alarm Generation Register (AGR) enables the generation of
Red Alarm. The table below shows configurations of the of Frame Declaration Enable bit of the Alarm
Generation Register (AGR).
8.6.3
How to configure the framer to transmit Yellow Alarm
Upon detection of Loss of Signal (LOS) or Loss of Frame (LOF) condition, the receiver will transmit the Yellow
Alarm back to the source indicating the loss of an incoming signal. This Yellow Alarm informs the source that
there is a problem further down the line and its transmission is not being received at the destination.
The XRT86VL3x framer supports transmission of Yellow Alarm when running at the following framing formats:
SF Mode
ESF Mode
N Mode
T1DM Mode
Yellow alarm is transmitted in different forms for various framing formats. The Yellow Alarm Generation Select
bits of the Alarm Generation Register (AGR) enable transmission of different types of Yellow alarm that are
supported by the XRT86VL3x framer.
ALARM GENERATION REGISTER (AGR)(ADDRESS = 0XN108H)
B
IT
N
UMBER
B
IT
N
AME
B
IT
T
YPE
B
IT
D
ESCRIPTION
3-2
Transmit AIS
Select
R/W
These READ/WRITE bit-fields allows the user to choose which one of the
two AIS pattern supported by the XRT86VL3x framer will be transmitted.
00 - No AIS alarm is generated.
01 - Enable unframed AIS alarm of all ones pattern.
10 - Enable framed AIS alarm of all ones pattern except for framing bits.
11 - No AIS alarm is generated.
ALARM GENERATION REGISTER (AGR)(ADDRESS = 0XN108H)
B
IT
N
UMBER
B
IT
N
AME
B
IT
T
YPE
B
IT
D
ESCRIPTION
6
Loss of Frame
Declaration Enable
R/W
This READ/WRITE bit-field permits the framer to declare Red Alarm in
case of Loss of Frame Alignment (LOF).
When receiver module of the framer detects Loss of Frame Alignment in
the incoming data stream, it will generate a Red Alarm. The framer will
also generate an RxLOFs interrupt to notify the microprocessor that an
LOF condition is occurred. A Yellow Alarm is then returned to the remote
transmitter to report that the local receiver detects LOF.
0 - Red Alarm declaration is disabled.
1 - Red Alarm declaration is enabled.
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