Grounding Shunt For E1 Nim Cards; Installing Shunt/Terminal Strip - Enterasys X-Pedition XSR-1850 Getting Started Manual

Grounding Shunt for E1 NIM Cards

If you connect a balun to a 75-ohm line, you will also need to attach a grounding shunt (or
terminal strip) to any NIM pins whose RJ-48C connectors utilize the balun. The XSR requires that
you use a shunt (shown in
interface, which are not needed to complete the connection.
Caution: The cable connecting the E1/ISDN PRI NIM to the balun requires two more wires to
extend the chassis ground to the balun. Cables of this type are often provided by your supplier
who can customize them to your needs.
Refer to "Hardware

Installing Shunt/Terminal Strip

To install the shunt or terminal strip, attach two dual-pin units vertically to each four-pin jumper
(P2, P3, P4, or P5) corresponding to the RJ-48C port using a balun, as shown in
other RJ-48C ports on the NIM card connected to 120-ohm lines do not require shunts.
Figure A-15), or terminal strip to ground pins 3 and 6 of the RJ-48C
Figure A-15
Installation" on page 2-1 to access the E1 card on the XSR.
Figure A-16 Installing a Grounding Shunt on the E1 NIM Card
Cable, CompactFlash and Accessory Specifications
Sample Grounding Shunt
Figure A-16. Any
XSR Getting Started Guide A-15