參數(shù)資料
型號: IDT82P2916BFG
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 81/138頁
文件大小: 0K
描述: IC LIU T1/E1/J1 16CH SH 484BGA
標準包裝: 84
功能: 線路接口單元(LIU)
接口: E1,J1,T1
電路數(shù): 16
電源電壓: 1.8V, 3.3V
功率(瓦特): 3.10W
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 484-LFBGA
供應商設備封裝: 484-CABGA(19x19)
包裝: 托盤
包括: AIS 警報檢測器和發(fā)生器,回送功能,PRBS 發(fā)生器 / 檢測器,遠程檢測器和發(fā)生器
IDT82P2916
16-CHANNEL HIGH-DENSITY T1/E1/J1 LINE INTERFACE UNIT
Functional Description
47
April 24, 2010
3.5.8
LOOPBACK
There are four kinds of loopback:
Analog Loopback
Remote Loopback
Digital Loopback
Dual Loopback
Refer to Figure-1 for loopback location.
3.5.8.1 Analog Loopback
Analog Loopback is enabled by the ALP bit (b0, LOOP,...). The data
stream to be transmitted on the TTIPn/TRINGn pins is internally looped
to the RTIPn/RRINGn pins.
In Analog Loopback mode, the data stream to be transmitted is still
output to the line side, while the data stream received from the line side
is covered by the Analog Loopback data.
Anytime when Analog Loopback is set, the other loopbacks (i.e.,
Digital Loopback and Remote Loopback) are disabled.
In Analog Loopback, the priority of the diagnostic facilities in the
receive path is: pattern generation > looped data. AIS generation is
disabled in both the receive path and the transmit path. Refer to Figure-
Figure-28 Priority Of Diagnostic Facilities During Analog Loopback
Tx path
BPV/CV, EXZ,
SLOS, AIS, pattern
detection
Pattern generation
Auto AIS
generation
X
Rx path
LLOS detection
AIS generation
X
BPV/CV, EXZ,
AIS, pattern
detection
Pattern generation
Analog
Loopback
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