3Com Router 5000 and Router 6000 v2.41

Module Guide

Chapter 4 Flexible Interface Cards (Router 6000)

zIf the to-be-connected network device has a 120-ohm port, you need a 75-ohm-to-120-ohm adapter or a 120-ohm cable instead.

2)When using a 120-ohm balanced twisted-pair cable, do the following:

zIf no cable extension is needed, directly connect the RJ-45 connector of the cable to the RJ-45 port on the device.

zIf cable extension is needed, connect the RJ-45 connector of the cable to a network interface connector, and the other end of the network interface connector to the device using a 120-ohm E1 trunk cable.

 

 

 

 

 

DB-15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RJ-45

 

RJ-45

Network

 

 

 

 

 

 

 

 

 

 

 

 

 

Router

 

 

 

 

 

 

 

 

devices such

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

as DDN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Network interface connector

 

 

 

 

 

 

 

 

120-ohm balanced twisted pair

 

120-ohm E1 trunk cable

Figure 4-30Extending an E1 120-ohm balanced twisted-pair cable

Step 4: Power on the router, and check the behavior of the LINK LED on the card: OFF means fault occurs on the line and the signal is not synchronized. Check the line status.

II. Connecting the interface cable of the Router 4-Port CE1/PRI FIC

Step 1: Select the cable appropriate to the type of the port on the to-be-connected device, and correctly set the DIP switch.

z

z

If the impedance of the to-be-connected port is 75-ohm, select E1 75-ohm unbalanced coaxial and 75-ohm 4E1 adapter cables, and set all the BITs of the DIP switch to the ON position (that is, the port impedance is 75-ohm).

If the impedance of the to-be-connected port is 120-ohm, select E1 120-ohm balanced twisted-pair and 120-ohm 4E1 adapter cables, and set all the BITs of the DIP switch to the OFF position (that is, the port impedance is 120-ohm).

Step 2: Insert the DB-25 connector of the 4E1 adapter cable into the to-be-connected port on the Router 4-Port CE1/PRI FIC and tighten the thumbscrews.

Step 3: Identify the sequence number of the DB-15 connector at the other end of the cable, and connect the connector to an E1 cable.

Step 4: Connect the E1 cable to another device, by reference to the previous subsection.

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3Com 3C13701 3C13751 3C13755 3C13759 3C13840 3C13880 manual DB-15 RJ-45 Network Router
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3C13751, 3C13701, 3C13840, 3C13759, 3C13880 specifications

The 3Com 3C13880 and 3C13840 are notable components within the realm of networking technology, primarily designed for enterprise-grade solutions. These devices belong to the 3Com family, which has long been recognized for its commitment to developing robust networking products tailored to facilitate efficient data transfers and improve connectivity across various platforms.

One of the standout features of the 3C13880 is its high-performance capabilities. This model supports advanced functions such as load balancing and fault tolerance, critical for maintaining optimum network performance in high-demand environments. Additionally, it supports various protocols, including Ethernet and Token Ring, making it versatile and adaptable to existing infrastructure. The device accommodates a wide range of network transmissions, ensuring seamless integration and operation within diverse network ecosystems.

In terms of connectivity, the 3C13880 is equipped with multiple ports, allowing for extensive device interconnectivity. This feature is particularly beneficial in large organization settings, where multiple devices, such as servers and workstations, need to communicate effectively. Coupled with high-speed data transmission rates, this model ensures minimal latency, enhancing overall network efficiency.

On the other hand, the 3C13840 is designed with a focus on cost-efficiency without sacrificing performance. This model provides essential networking features suitable for smaller business environments or those seeking budget-friendly options. It delivers reliable throughput and the ability to support a moderate number of users, making it ideal for small to mid-sized offices.

Both the 3C13880 and 3C13840 incorporate technologies that prioritize security and reliability. Features such as VLAN support and QoS settings help optimize network performance while ensuring the security and integrity of data are maintained. The devices also support management tools that allow administrators to monitor network performance in real time, facilitating quick troubleshooting and enhancing overall network management.

In summary, both the 3Com 3C13880 and 3C13840 devices stand out in networking technology by offering unique features tailored to different organizational needs. While the 3C13880 appeals to enterprises needing high performance and robust capabilities, the 3C13840 provides an accessible option for those requiring effective and budget-conscious networking solutions. The legacy of 3Com continues to be evident in these products, reflecting their innovative approach to addressing the dynamic demands of modern networking.
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