參數(shù)資料
型號: XRT86VL3x
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): 105/153頁
文件大小: 1316K
代理商: XRT86VL3X
XRT86VL3X
98
REV. 1.2.2
T1/E1/J1 FRAMER/LIU COMBO - ARCHITECTURE DESCRIPTION
The Repeater will also transmit a Blue Alarm, also known as Alarm Indication Signal (AIS) to the CPE. Blue
alarm is an all ones pattern indicating that the equipment is functioning but unable to offer service due to
failures originated from remote side. It is sent such that the equipment downstream will not lose clock
synchronization even though no meaningful data is received.
Figure 96
below illustrates this scenario in which
the Repeater is sending an AIS to the CPE upon detection of line failure from the CO.
F
IGURE
95. G
ENERATION
OF
Y
ELLOW
A
LARM
BY
THE
R
EPEATER
UPON
DETECTION
OF
LINE
FAILURE
E1 Receive
Framer Block
E1 Transmit
Framer Block
E1 Receive
Framer Block
E1 Transmit
Framer Block
E1
Transmit
Section
E1
Transmit
Section
E1
Receive
Section
E1
Receive
Section
CO
Repeater
CPE
The E1 line is
broken
Repeater declares
Red Alarm
internally
Yellow
Alarm
Repeater generates
Yellow Alarm to CO
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