Enterasys ANG-3000 Specifikace stáhnout pdf (Strana 102)

Cable, CompactFlash and Accessory Specifications

A-14

Balun for E1 or PRI NIM Cards

Some overseas electrical systems require that you use a balun and grounding shunt when utilizing

an E1 or PRI NIM card on the XSR. A balun is an adapter employed to connect a 75-ohm coaxial

cable pair (2 BNC connectors) to a 120-ohm twisted pair cable (RJ-48C connector).

The balun and its connectors are illustrated in Figure A-14. The grounding shunt is also required

to ground unused pins of the RJ-48C connector.

To install the balun, attach the 75-ohm coaxial cables to the BNC connectors and a 120-ohm E1/

PRI cable to the RJ-48C port (see below for details).

Figure A-14 Balun for E1 or PRI Connection

RX In TX Out

G.703 Balun

Model 460 MC

-E1-C

AX-BLN

J12 Transmit BNC

male connector

75-ohm connection

to your network

120-ohm

connection to XSR

J2 Receive BNC

male connector

75-ohm connection

to your network

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Enterasys ANG-3000 Specifikace Strana 102