XRT83VSH28IB-F View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT83VSH28IB-F' PDF : 74 Pages View PDF
XRT83VSH28
PRELIMINARY
8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
REV. P1.0.0
4.2.6 Receive Interface with N+1 Redundancy
For N+1 redundancy, the receivers on the primary cards should be programmed for internal impedance. The
receivers on the backup card should be programmed for "High" impedance mode. To swap the primary card,
set the backup card to internal impedance, then the primary card to "High" impedance. See Figure 27 for a
simplified block diagram of the receive section for a N+1 redundancy scheme.
FIGURE 27. SIMPLIFIED BLOCK DIAGRAM OF THE RECEIVE INTERFACE FOR N+1 REDUNDANCY
Backplane Interface
Primary Card
XRT83VSH28
Internal
Impedence
Primary Card
Rx
XRT83VSH28
Internal
Impedence
Primary Card
Rx
XRT83VSH28
Internal
Impedence
Backup Card
Rx
XRT83VSH28
Rx
"High"
Impedence
Line Interface Card
1:1
1:1
1:1
E1 Line
E1 Line
E1 Line
37
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