XRT83SL314IB View Datasheet(PDF) - Exar Corporation

Part Name

Description

MFG CO.

XRT83SL314IB

14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT

Exar Corporation 

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XRT83SL314

REV. 1.0.1

xr

14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT

3.3.6 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

XRT83SL314

Internal

Impedence

Primary Card

Rx

XRT83SL314

Internal

Impedence

Primary Card

Rx

XRT83SL314

Internal

Impedence

Backup Card

Rx

XRT83SL314

Rx

"High"

Impedence

Line Interface Card

1:1

1:1

1:1

T1/E1 Line

T1/E1 Line

T1/E1 Line

33

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