Cable, CompactFlash and Accessory Specifications

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 shown in Figure A-14. The grounding shunt is also required to insulate (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).

J2 Receive BNC male connector

75-ohm connection to your network

Figure A-14 Balun for E1 or PRI Connection

 

 

 

 

 

 

 

 

 

 

 

 

J12 Transmit BNC

 

 

 

 

male connector

 

 

 

 

 

 

 

75-ohm connection

 

 

 

 

 

 

 

to your network

 

 

 

 

 

 

 

 

RX

 

 

 

 

 

 

TX

 

In

NIM

 

 

 

 

 

 

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E1

 

 

 

 

 

 

 

 

 

 

 

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G

Out

 

 

 

 

CO

 

 

 

 

 

 

 

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Model

 

 

 

 

AX

703

 

 

 

 

BLN

 

 

 

 

 

 

 

 

 

 

-

 

 

 

 

 

 

 

 

 

 

 

Balun

 

 

 

 

 

 

 

 

 

 

460

 

 

 

 

 

 

 

 

MC

 

 

 

 

 

120-ohm

 

 

 

 

 

 

 

 

 

 

 

connection to XSR

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 Figure A-15), or terminal strip to ground pins 3 and 6 of the RJ-48C interface, which are not needed to complete the connection.

Figure A-15 Sample Grounding Shunt

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 Installation” on page 2-1 to access the E1 card on the XSR.

XSR Getting Started Guide A-13

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Enterasys Networks XSR-3020 manual Balun for E1 or PRI NIM Cards, Grounding Shunt for E1 NIM Cards

XSR-3020 specifications

Enterasys Networks XSR-3020 is a sophisticated Layer 2 and Layer 3 switch designed to meet the demands of modern networking environments. Known for its robust performance and versatility, the XSR-3020 is an ideal solution for enterprises that require high efficiency, comprehensive security, and network reliability.

This switch supports a variety of advanced technologies, making it suitable for both data center and edge deployments. One of its standout features is its scalability. The XSR-3020 can accommodate growing network demands by allowing for easy integration of additional modules. This capacity for expansion ensures that organizations can adapt their networks without the need for complete hardware replacements.

The XSR-3020 offers high-speed connectivity through its multiple gigabit Ethernet ports, providing up to 48 10/100/1000BASE-T ports in a single chassis. This high-density design optimizes the physical space and ensures that organizations can connect numerous devices simultaneously without sacrificing performance. Additionally, it supports Power over Ethernet (PoE), allowing users to power network devices, such as IP cameras and access points, directly through the switch. This feature streamlines installations and reduces the clutter of electrical wiring.

Security is a critical consideration in today’s network landscape, and the XSR-3020 addresses this need with robust security features. It incorporates advanced access control capabilities, enabling administrators to segment traffic and enforce policies effectively. The switch also supports 802.1X authentication, ensuring that only authorized devices can connect to the network.

In terms of management, the XSR-3020 is designed to simplify operations through its user-friendly interface and extensive support for management protocols. It offers native support for Simple Network Management Protocol (SNMP) and can be easily integrated with various network management systems, allowing for efficient monitoring and troubleshooting.

Another key characteristic of the XSR-3020 is its reliability. With features such as redundant power supplies and fans, the switch ensures high availability, minimizing downtime for critical applications. It is also built to withstand harsh conditions, making it suitable for diverse environments.

Overall, the Enterasys Networks XSR-3020 combines high performance, scalability, and security, making it an excellent choice for organizations looking to enhance their network infrastructure. Its comprehensive set of features positions it as a reliable backbone for any modern enterprise network, ensuring that businesses can operate efficiently and securely.