XRT83SL314 datasheet(34/83 Pages) EXAR

Part #	XRT83SL314

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

PDF	83 Pages

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Manufacturer	EXAR [Exar Corporation]

Direct Link	http://www.exar.com

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XRT83SL314

REV. 1.0.1

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

FIGURE 25. SIMPLIFIED BLOCK DIAGRAM OF THE RECEIVE INTERFACE FOR 1:1 AND 1+1 REDUNDANCY

3.3.4

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.

"High" Impedence

Internal Impedence

Backplane Interface

Primary Card

Backup Card

XRT83SL314

T1/E1 Line

1:1

XRT83SL314

XRT83SL314 Datasheet(PDF) 34 Page - Exar Corporation