3Com Router 5000 and Router 6000 v2.41

Chapter 3

Module Guide

Multifunctional Interface Modules (Router 5000)

The synchronous serial interface can work in either DTE or DCE mode. Two directly connected devices must work as DTE and DCE respectively. The DCE provides clock synchronization and specifies the communication rate, whereas the DTE accepts clock synchronization and communicates at the specified rate.

The router normally works as a DTE. To identify whether the equipment connected to the router is DTE or DCE, refer to the manual shipped with the equipment.

II.Speed and transmission segment of synchronous/asynchronous serial interface

In different operating modes, the synchronous/asynchronous serial interface supports different electric signal specifications and baud rates. In addition, the maximum signal transmission segment depends not only on the specified baud rate but also on the selected cable. The following table shows how the cable type, baud rate, and the maximum signal transmission segment related to each other.

Table 3-16Speed and transmission segment of the V.24 (RS232)/V.35 cable

 

 

V.24 (RS232)

 

 

V.35

 

 

 

 

 

 

 

 

Baud rate (bps)

Max. transmission

 

Baud rate (bps)

Max. transmission segment

 

segment

 

 

 

 

 

 

 

 

 

 

 

 

2400

 

60 m (196.9 ft.)

2400

1250 (4101 ft.)

 

 

 

 

 

4800

 

60 m (196.9 ft)

4800

625 m (2050.5 ft.)

 

 

 

 

 

9600

 

30 m (98.4 ft.)

9600

312 m (1023.6 ft.)

 

 

 

 

 

19200

 

30 m (98.4 ft)

19200

156 m (511.8 ft.)

 

 

 

 

 

38400

 

20 m 65.6 ft.)

38400

78 m (255.9 ft.)

 

 

 

 

 

64000

 

20 m (65.6 ft)

56000

60 m (196.9 ft.)

 

 

 

 

 

115200

 

10 m (32.8 ft.)

64000

50 m (164 ft.)

 

 

 

 

 

 

 

––

 

––

2048000

30 m (98.4 ft.)

 

 

 

 

 

 

 

Note:

When a V.24 cable is used, the baud rate of the FIC-SA in synchronous mode shall not exceed 64 Kbps.

3.7.2 Interface Attributes

The following table describes the interface attributes of the FIC-SAE:

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3Com 3C13701 3C13751 3C13755 3C13759 3C13840 3C13880 manual Interface Attributes

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.