XRT83L314IB View Datasheet(PDF) - Exar Corporation

Part Name

Description

MFG CO.

XRT83L314IB

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

Exar Corporation 

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XRT83L314

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

REV. 1.0.0

4.3.6 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 39 for a

simplified block diagram of the receive section for a N+1 redundancy scheme.

FIGURE 39. SIMPLIFIED BLOCK DIAGRAM OF THE RECEIVE INTERFACE FOR N+1 REDUNDANCY

Backplane Interface

Primary Card

Internal

Impedence

Primary Card

XRT83L314

Rx

XRT83L314

Internal

Impedence

Primary Card

Rx

XRT83L314

Internal

Impedence

Backup Card

Rx

XRT83L314

Rx

"High"

Impedence

Line Interface Card

1:1

1:1

1:1

T1/E1 Line

T1/E1 Line

T1/E1 Line

40

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