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XRT83SL28IV Datasheet(PDF) 31 Page - Exar Corporation

Part # XRT83SL28IV
Description  8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
PDF  47 Pages
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRT83SL28IV Datasheet(HTML) 31 Page - Exar Corporation

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XRT83SL28
REV. 1.0.0
8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
29
3.2.6
Receive Interface with N+1 Redundancy
For N+1 redundancy, the receivers on all cards can be programmed for internal impedance. The receivers on
the backup card do not have to be tri-stated. To swap the primary card, close the desired relays. See Figure
Figure 24 for a simplified block diagram of the receive section for an N+1 redundancy scheme.
FIGURE 24. SIMPLIFIED BLOCK DIAGRAM OF THE RECEIVE INTERFACE FOR N+1 REDUNDANCY
Backplane Interface
Primary Card
XRT83SL28
Rx
Line Interface Card
Primary Card
Rx
Primary Card
Rx
Backup Card
Rx
Internal Impedance
E1 Line
E1 Line
E1 Line
1:1
1:1
1:1
XRT83SL28
XRT83SL28
XRT83SL28
Internal Impedance
Internal Impedance
Internal Impedance



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