參數(shù)資料
型號： IDT82P2916BFG
廠商： IDT, Integrated Device Technology Inc
文件頁數(shù)： 83/138頁
文件大?。?/td> 0K
描述： IC LIU T1/E1/J1 16CH SH 484BGA
標(biāo)準(zhǔn)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(yīng)商設(shè)備封裝： 484-CABGA（19x19）
包裝： 托盤
包括： AIS 警報(bào)檢測器和發(fā)生器，回送功能，PRBS 發(fā)生器 / 檢測器，遠(yuǎn)程檢測器和發(fā)生器
IDT82P2916
16-CHANNEL HIGH-DENSITY T1/E1/J1 LINE INTERFACE UNIT
Functional Description
49
April 24, 2010
3.5.8.3 Digital Loopback
The Digital Loopback can be configured manually or automatically.
Either manual Digital Loopback configuration or automatic Digital Loop-
back configuration will enable Digital Loopback.
Manual Digital Loopback is enabled by the DLP bit (b2, LOOP,...).
Automatic Digital Loopback is enabled when the pattern detection is
assigned in the transmit path (i.e., the PD_POS bit (b3, PD,...) is ‘1’) and
the AUTOLP bit (b3, LOOP,...) is ‘1’. The corresponding channel will
enter Digital Loopback when the activate IB code is detected in the
transmit path for more than 5.1 sec.; and will return from Digital Loop-
back when the deactivate IB code is detected in the transmit path for
more than 5.1 sec. Refer to section Inband Loopback (IB) Detection on
page 43 for details. When automatic Digital Loopback is active, setting
the AUTOLP bit (b3, LOOP,...) back to ‘0’ will also stop automatic Digital
Loopback. The setting of the PD_POS bit (b3, PD,...) should not be
changed during automatic Digital Loopback. The AUTOLP_S bit (b7,
STAT0,...) indicates the automatic Digital Loopback status.
In Digital Loopback mode, the data stream output from the TJA (if
enabled) is internally looped to the Decoder (if enabled). 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 Digital Loopback
data. However, LLOS and AIS detection in the receive path still monitors
the data stream received from the line side.
In Digital Loopback mode, the priority of the diagnostic facilities in the
receive path is: pattern generation > looped data; the priority of the diag-
nostic facilities in the transmit path is: pattern generation > looped data >
AIS generation. AIS generation is disabled in the receive path.
Figure-30 Priority Of Diagnostic Facilities During Digital Loopback
Tx path
BPV/CV, EXZ,
SLOS, AIS, pattern
detection
Pattern generation
AIS generation
Rx path
LLOS, AIS
detection
AIS generation
X
BPV/CV, EXZ,
AIS, pattern
detection
Pattern generation
Digital
Loopback
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參數(shù)描述
IDT82P2916BFG8 制造商:Integrated Device Technology Inc 功能描述:IC LIU T1/E1/J1 16CH SH 484BGA
IDT82P5088 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:Universal Octal T1/E1/J1 LIU with Integrated Clock Adapter
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