3Com Router 5000 and Router 6000 v2.41

Module Guide

Chapter 4 Flexible Interface Cards (Router 6000)

4.16 Router 4-Port E1 IMA FIC

4.16.1 Introduction

Router 4-Port E1 IMA FIC, the 4port E1 ATM inverse multiplexing interface card provides four or eight E1 interfaces that support inverse multiplexing for ATM (IMA) technology.

IMA technology distributes an ATM cell stream over multiple low-speed links on a cell by cell basis and reassembles the cells into the original stream at the far end. It is a cost-effective way for you to transmit high-speed ATM cell streams over low-speed links while allowing for great flexibility.

This technology is common on a PDH network over which ATM cells are transmitted.

4.16.2 Interface Attributes

The following table describes the interface attributes:

Table 4-33Interface attributes of the Router 4-Port E1 IMA FIC

 

 

 

 

 

Description

 

 

 

 

 

 

 

 

 

 

 

 

 

Attribute

 

Router 4-Port

 

 

Router 4-Port

 

(120-ohm)

 

 

 

 

E1 IMA FIC

 

(75-ohm)

E1 IMA FIC

 

 

 

 

 

(75-ohm)

 

 

(120-ohm)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Connector

 

DB-68

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Number of

1

 

 

 

 

 

 

 

connectors

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Interface standard

 

ITU-G.703, ITU-G.704

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Interface rate

2.048 Mbps

 

 

 

 

 

 

 

 

 

 

Cable type

75-ohm 8E1 conversion cable

120-ohm 8E1 conversion cable

 

 

 

 

 

 

 

 

 

 

 

Cable characteristic

 

75-ohm

 

120-ohm

 

 

 

impedance

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Max transmission

 

500 m (1640.4 feet)

 

150 m (492.1 feet)

 

 

 

distance

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Operating mode

ATM E1 independent link /IMA bundle mode

 

 

 

 

 

 

 

 

 

 

 

Supported service

AAL5

 

 

 

 

 

 

 

 

 

 

 

 

 

Protocol

PPPoA, PPPoEoA, IPoA, IPoEoA

 

 

 

 

 

 

 

 

 

 

 

 

 

Transmission rate

 

CBR/VBR-rt/VBR-nrt/UBR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4-50

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Image 166
3Com 3C13751, 3C13759, 3C13701, 3C13880 Router 4-Port E1 IMA FIC, Description Attribute Router 4-Port, 75-ohm, ohm 120-ohm
Page 165 Page 167

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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