II. Introduction to DTE and DCE

3Com Router 5000 and Router 6000 v2.41							Chapter 3
Module Guide					Multifunctional Interface Modules (Router 5000)
	Table 3-12Baud rate and transmission distance of V.24 (RS232)/V.35 cable

			V.24 (RS232)				V.35

		Baud rate (bps)		Maximum transmission		Baud rate	Maximum transmission
		Baud rate (bps)		Distance (m)		(bps)	Distance (m)
				Distance (m)		(bps)	Distance (m)

		2400		60		2400	1250

		4800		60		4800	625

		9600		30		9600	312

		19200		30		19200	156

		38400		20		38400	78

		64000		20		56000	60

		115200		10		64000	50

		-		-		2048000	30

Caution:

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

Synchronous serial interfaces support both DTE and DCE operating modes. Given two directly connected devices, 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 3-13Typical DTE and DCE equipment

Equipment type	Interface type	Typical equipment

DTE	Male	PC, Router

DCE	Female	Modem, Multiplexer, CSU/DSU

3-21

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.

3Com 3C13759, 3C13701, 3C13880, 3C13840, 3C13751 manual II. Introduction to DTE and DCE

Models: 3C13751 3C13701 3C13840 3C13759 3C13880 3C13701 3C13751 3C13755 3C13759 3C13840 3C13880

V.24 (RS232)

Baud rate (bps)

Maximum transmission

Distance (m)

(bps)

II. Introduction to DTE and DCE

Equipment type

DTE

DCE

3C13751, 3C13701, 3C13840, 3C13759, 3C13880 specifications