XRT83SL314IB View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT83SL314IB' PDF : 83 Pages View PDF
XRT83SL314
REV. 1.0.1
xr
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
Backplane Interface
Primary Card
Rx
Internal Impedence
Backup Card
Rx
"High" Impedence
XRT83SL314
1:1
XRT83SL314
1:1
T1/E1 Line
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.
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