參數(shù)資料
型號: XRT86VL3X_07
廠商: Exar Corporation
元件分類: 通信及網(wǎng)絡
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): 114/153頁
文件大小: 1316K
代理商: XRT86VL3X_07
XRT86VL3X
107
T1/E1/J1 FRAMER/LIU COMBO - ARCHITECTURE DESCRIPTION
REV. 1.2.2
Now let us consider another scenario in which the DS1 line between CO and the Repeater is broken. Again,
upon detection of Loss of Signal (LOS) or Loss of Frame (LOF) condition, the Repeater will generate an
internal Red Alarm. This alarm will normally trigger a microprocessor interrupt informing the user that an
incoming signal failure is happening.
The Repeater will also send an all ones AIS pattern downstream to the CPE and a Yellow Alarm back to the
CO. The CPE uses the AIS signal to recover received clock and remain in synchronization with the system.
Upon detecting the incoming AIS signal, the CPE will generate a Yellow Alarm to the Repeater to indicate the
loss of incoming signal. The Figure below illustrates this scenario in which the Repeater is sending an AIS to
the CPE and the CPE is sending a Yellow Alarm back to the Repeater.
Generation of AIS by the Repeater upon detection of Yellow Alarm originated by the CPE
DS1 Receive
Framer Block
DS1 Transmit
Framer Block
DS1 Receive
Framer Block
DS1 Transmit
Framer Block
DS1
Transmit
Section
DS1
Transmit
Section
DS1
Receive
Section
DS1
Receive
Section
CO
Repeater
CPE
The DS1 line is
broken
CPE declares Red
Alarm internally
Yellow
Alarm
Repeater detects
Yellow alarm and
generate AIS to CO
AIS
相關PDF資料
PDF描述
XRT86VL3X Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
XRT91L30_0611 STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
XRT91L306 STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
XRT91L30IQ STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
XRT91L30 STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
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