Module Guide, 8BIT | 3Com 3C13840, 3C13759, 3C13701, 3C13880, 3C13751

3Com Router 5000 and Router 6000 v2.41

Module Guide			Chapter 2 Smart Interface Cards

	DIP switch	Description	75 -ohm	120 -ohm impedance
	DIP switch	Description	impedance	120 -ohm impedance
			impedance

				OFF: RxShield grounding
	8BIT	Switch for RxShield	-	via capacitor
	8BIT	grounding options	-	ON: RxShield directly
		grounding options		ON: RxShield directly
				grounding

Caution:

zWhen setting internal DIP switch, you are recommended to: turn ON all BITs from 1 to 8 when a 75-ohm cable is connected. Turn OFF all BITs from 1 to 8 when a 120-ohm cable is connected;

zThe default configuration of internal DIP switch is that all the 8 positions of the BIT switch are ON, that is, the E1 interface impedance is 75-ohm.

2.4.5Interface LEDs

Router 1-Port Fractional E1 SIC panel is shown in the following figure:

Fractional E1

Figure 2-15Router 1-Port Fractional E1 SIC panel

The status description of the LEDs is given in the following table:

Table 2-11Description of the LEDs on Router 1-Port Fractional E1 SIC panel

	LED	Description

		OFF means the link is not connected. ON means the link is connected and
	LINK	can correctly receive carrier (E1 mode) or frame synchronous signals
		(cE1/PRI or FE1).

	ACT	OFF means no data is being transmitted or received; blinking means data is
	ACT	being received or/and transmitted.
		being received or/and transmitted.

2-16

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 3C13840, 3C13759, 3C13701, 3C13880, 3C13751 manual Module Guide, 8BIT

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

Module Guide

8BIT

2.4.5Interface LEDs

Figure 2-15Router 1-Port Fractional E1 SIC panel

The status description of the LEDs is given in the following table:

Table 2-11Description of the LEDs on Router 1-Port Fractional E1 SIC panel

LED

ACT

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