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參數(shù)資料
| 型號(hào)： | XRT83VSH28 |
| 廠商： | Exar Corporation |
| 英文描述： | 8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT |
| 中文描述： | 8路E1短途線路接口單元 |
| 文件頁(yè)數(shù)： | 39/74頁(yè) |
| 文件大?。?/td> | 574K |
| 代理商： | XRT83VSH28 |
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PRELIMINARY
8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
XRT83VSH28
36
REV. P1.0.0
4.2.4
N+1 Redundancy Using External Relays
N+1 redundancy has one backup card for N primary cards. Due to impedance mismatch and signal contention,
external relays are necessary when using this redundancy scheme. The relays create complete isolation
between the primary cards and the backup card. This allows all transmitters and receivers on the primary cards
to be configured in internal impedance, providing one bill of materials for all interface modes of operation. The
transmit and receive sections of the LIU device are described separately.
4.2.5
Transmit Interface with N+1 Redundancy
For N+1 redundancy, the transmitters on all cards should be programmed for internal impedance. The
transmitters on the backup card do not have to be tri-stated. To swap the primary card, close the desired
relays, and tri-state the transmitters on the failed primary card. A 0.68uF capacitor is used in series with TTIP
for blocking DC bias. See
Figure 26
for a simplified block diagram of the transmit section for an N+1
redundancy scheme.
F
IGURE
26. S
IMPLIFIED
B
LOCK
D
IAGRAM
OF
THE
T
RANSMIT
I
NTERFACE
FOR
N+1 R
EDUNDANCY
Backplane Interface
Primary Card
XRT83VSH28
Tx
Line Interface Card
0.68uF
E1 Line
0.68uF
Primary Card
Tx
0.68uF
Primary Card
Tx
0.68uF
Backup Card
Tx
E1 Line
E1 Line
Internal
Impedence
1:2
1:2
1:2
XRT83VSH28
XRT83VSH28
XRT83VSH28
Internal
Impedence
Internal
Impedence
Internal
Impedence
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| XRT83VSH28IB | 8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT |
| XRT83VSH314 | 14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT |
| XRT83VSH314IB | 14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT |
| XRT83VSH316 | 16-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT |
| XRT83VSH316IB | 16-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XRT83VSH28ES | 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI 8 CH E1 LIU SH (low cost version) RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| XRT83VSH28IB | 功能描述:接口 - 專用 8 Ch T1/E1 Framer RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:BGA-59 |
| XRT83VSH28IB-F | 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI 8 Channel 1.8V-3.3V temp -45 to 85C RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| XRT83VSH28IB-F | 制造商:Exar Corporation 功能描述:T1/E1 LIU IC |
| XRT83VSH314 | 制造商:EXAR 制造商全稱:EXAR 功能描述:14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT |
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