3Com Router 5000 and Router 6000 v2.41

Module Guide

Chapter 4 Flexible Interface Cards (Router 6000)

4.14 Router 1/2-Port ADSL FIC

4.14.1 Introduction

Router 1/2-Port ADSL FIC, the 1-/2-port ADSL over PSTN interface card, allows a LAN subscriber to connect to the digital subscriber's loop access multiplexer (DSLAM) at the central office over a regular analog subscriber line or telephone line. Thus, the subscriber can access the ATM/IP backbone or the Internet to enjoy services such as high-speed data communication and video on demand (VoD).

ADSL transmits data in the high frequency band above 26 kHz. Therefore, it can provide services without interfering with the voice service being provided in the low frequency band (0 to 4 kHz) on the same line. It provides downlink rates in the range 32 kbps to 8 Mbps and uplink rates in the range 32 kbps to 1 Mbps.

The ADSL interface cards provide these functions:

z

z

z

Manual ADSL line activation and deactivation, supporting SAR loopback for convenient fault isolation.

Interface standards of G. DMT, G. Lite, and T1.413, auto-sensing.

Trellis coding (except for G. Lite) on ADSL interfaces, enhancing stability of ADSL connections.

4.14.2 Interface Attributes

The following table describes the interface attributes of the Router 1/2-Port ADSL FIC.

Table 4-29Interface attributes of the Router 1/2-Port ADSL FIC

Attribute

Router 1-Port ADSL FIC

Router 2-Port ADSL FIC

 

 

 

Connector

RJ-11

 

 

 

 

Number of connectors

1 (Router 1-Port ADSL FIC)

 

2 (Router 2-Port ADSL FIC)

 

 

 

 

 

 

 

ITU-T 992.1 G.DMT

 

Interface standard

ITU-T 992.2 G.Lite

 

 

ANSI T1.413 Issue 2

 

 

 

 

In ADSL full rate mode (ITU-T 992.1 G.DMT/ANSI T1.413):

Interface rate

8160 kbps (downlink rate)

 

 

896 kbps (uplink rate).

 

 

 

Cable and the Max. transmission

In full rate mode, 1.8 km (1.1 mi.) over the telephone cable

segment

( depending on the line quality).

 

 

 

 

4-45

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3Com 3C13701 3C13751 3C13755 3C13759 3C13840 3C13880 manual Router 1/2-Port Adsl FIC
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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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