3Com Router 5000 and Router 6000 v2.41

Module Guide

Chapter 2 Smart Interface Cards

 

 

 

 

 

Caution:

The baud rate cannot exceed 64 kbps if V.24 cable is used and the interface operates in synchronous mode.

II. DTE and DCE

The synchronous serial interface supports both DTE (Data Terminal Equipment) and DCE (Data Circuit-terminating Equipment) operating modes. Given that two devices are directly connected, if one operates in the DTE mode, the other will operate in the DCE mode. The DCE device provides the synchronous clock and specifies the communicating rate. The DTE device receives the synchronous clock and communicates at the specified rate. Generally, the Router is used as a DTE device. To make sure that the device is a DTE or DCE, refer to the manual shipped with this device. In addition, the following table may also help you to identify the type of the device.

Table 2-4Typical DTE and DCE equipment

Equipment type

Interface type

Typical equipment

 

 

 

DTE

Male

PC, Router

 

 

 

DCE

Female

Modem, Multiplexer, CSU/DSU

 

 

 

Asynchronous serial interface is generally used as dialing port and connected to a modem or a Terminal Adapter (TA). In this case, regardless of the operating mode of the device, only an appropriate baud rate for the interface needs to be selected.

Synchronous serial interface is generally used for the direct connection to such a device as DDN, frame relay, or X.25 switch.

2.2.2 Appearance

Router 1-Port Serial SIC is illustrated in the following figure:

2-4

Page 21
Image 21
3Com 3C13840, 3C13759, 3C13701 manual Appearance, II. DTE and DCE, Equipment type Interface type Typical equipment, Dte, Dce

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.