Introduction, Dimensions and Standards

Installation Guide

OfficeConnect®

Cable/DSL Gateway (3C855)

INTRODUCTION

About This Guide:

This Guide takes you through the basic steps necessary to install and configure your OfficeConnect Cable/DSL Gateway, and establish a connection from your computers to the Internet. Throughout, the OfficeConnect Cable/DSL Gateway is simply referred to as the Gateway.

Your package contains:

●One OfficeConnect Cable/DSL Gateway

●One power adapter for use with the Gateway

●Four rubber feet

●One Ethernet cable, 1m (3.28 ft) long

●One CD-ROM containing the Gateway Discovery program and the User Guide

●This Installation Guide

●One Support and Safety Information Sheet

●One Warranty Flyer

System Requirements

Before starting, you must ensure the following:

●You already have a cable or DSL broadband connection to the Internet, with a suitable modem, and that this connection works properly. The modem must have an Ethernet port for connection to your Gateway.

●You have a computer that has an Ethernet connection available and is already correctly configured for communication with the Internet. Your computer must be able to connect to the Internet via the modem, and must have a Web browser installed.

●There are no other DHCP server devices on your local network that are responsible for allocating IP addresses to your computers and other network- connected devices. Your Gateway will now perform this function by default.

If one or more of these conditions are not met, refer to the comprehensive Gateway User Guide provided on the accompanying CD-ROM for further guidance.

DIMENSIONS AND STANDARDS

Dimensions and Operating Conditions

Standards

Functional:	ISO 8802/3	EMC:	EN 55022	Class B
	IEEE 802.3, 802.3u		EN 55024
Safety:	UL 1950, EN 60950		FCC Part 15 Class B*
	CSA 22.2 #950,		ICES-003 Class B
	IEC60950		VCCI Class B
			CNS 13438 Class A
		Environmental:	EN 60068	(IEC 68)

* Refer to Regulatory Notices section in the Support and Safety Information sheet

Cable/DSL Gateway 7 VA, 23.9 BThU/hr power requirement

0 to 40ºC (32 to 105ºF) operating temperature

0 to 90% (non-condensing) humidity

	y
	tewa
	SL Ga
	ble/D
	ct Ca
	onne
e/DSL	ficeC
e/DSL	Of
Cabl

	us
LAN	Stat

Cable/DSL Gateway 535g (1.3 lb)

POSITIONING YOUR GATEWAY

Safety Information

WARNING: Please read the ‘Important Safety Information’ section in the Support and Safety Information sheet before you start.

VORSICHT: Bitte lesen Sie den Abschnitt ‘Wichtige Sicherheitsinformationen’ sorgfältig durch, bevor Sie das Gerät einschalten.

AVERTISSEMENT: Veuillez lire attentivement la section "Consignes importantes de sécurité" avant de mettre en route.

When positioning your Gateway, ensure:

●It is out of direct sunlight and away from sources of heat.

●Cabling is away from power lines, fluorescent lighting fixtures, and sources of electrical noise such as radios, transmitters and broadband amplifiers.

●Water or moisture cannot enter the case of the unit.

●Air flow around the unit and through the vents in the side of the case is not restricted. We recommend you provide a minimum of 25mm (1in.) clearance.

Using the Rubber Feet

Use the four self-adhesive rubber feet to prevent your Gateway from moving around on your desk or when stacking with other flat top OfficeConnect units. Only stick the feet to the marked areas at each corner of the underside of your Gateway.

ABOUT YOUR GATEWAY

Cable/DSL Gateway - Front

Cable/DSL Gateway - Rear

1	2	3	4		5	6	7
		LAN Status	Cable/DSL	3C855
						Ethernet
Alert				OfficeConnect Cable/DSL Gateway		Cable/	4
						DSL	4
						DSL

3Com Corporation, Corporate Headquarters, 5400 Bayfront Plaza, Santa Clara, CA 95052-8145

Microsoft, MS-DOS and Windows are registered trademarks of Micorsoft Corporation.

All other company and product names may be trademarks of their respective companies.

Part number: DIA0085-5AAA01 Published: December 2001

1Alert LED orange

Indicates a number of different conditions, as described below.

Off - The Gateway is operating normally.

Flashing quickly - Indicates one of the following conditions:

•The Gateway has just been started up and is running a self-test routine, or

•The administrator has invoked the Reset to Factory Defaults command, or

•The system software is in the process of being upgraded

In each of these cases, wait until the Gateway has completed the current operation and the alert LED is Off.

Flashing slowly - The Gateway has completed the Reset to Factory Defaults process, and is waiting for you to reset the unit. To do this, remove power, wait 10 seconds and then re-apply power. The Gateway will then enter the start-up sequence and resume normal operation.

On for 2 seconds, and then off - The Gateway has detected and prevented a hacker from attacking your network from the Internet.

Continuously on - A fault has been detected with your Gateway during the start-up process. Refer to the main User Guide.

2Power LED green

Indicates that the Gateway is powered on.

3Four LAN Status LEDs

green (100Mbps link) / yellow (10Mbps link)

If the LED is on, the link between the port and the next piece of network equipment is OK. If the LED is flashing, the link is OK and data is being transmitted or received. If the LED is off, nothing is connected, or the connected device is switched off, or there is a problem with the connection (refer to the "Problem Solving" section).

4Cable/DSL Status LED yellow

If the LED is on, the link between the Gateway and the cable or DSL modem is OK. If the LED is flashing, the link is OK and data is being transmitted or received. If the LED is off, nothing is connected, the modem is switched off or there is a problem (refer to the "Problem Solving" section).

5Power Adapter socket

Only use the power adapter that is supplied with this Gateway. Do not use any other adapter.

6Ethernet Cable/DSL port

Use the supplied patch cable to connect the Gateway to the 10BASE-T port on your cable or DSL modem. This port will only operate at 10Mbps in half-duplex mode.

7Four 10/100 LAN ports

Use suitable cable with RJ-45 connectors. You can connect your Gateway to a computer, or to any other piece of equipment that has an Ethernet connection (for example, a hub or a switch). All ports will automatically adjust for the correct speed, duplex mode and cable type, which means that you can connect devices to your Gateway using either straight-through or crossover cables.

3C855 specifications

The 3Com 3C855 is a versatile and robust network device that has made a significant impact in the field of networking equipment. This high-performance router is designed to meet the needs of small to medium-sized businesses, offering features that enhance connectivity, security, and ease of use.

One of the primary characteristics of the 3C855 is its comprehensive routing capabilities. It supports both static and dynamic routing protocols, including OSPF and RIP, which allows for optimal traffic management and improved network performance. The device also provides advanced Quality of Service (QoS) features that prioritize bandwidth for critical applications, ensuring smooth operation even under heavy loads.

Security is a top priority for any network device, and the 3Com 3C855 does not disappoint. It is equipped with robust firewall capabilities, which help protect against external threats while maintaining secure access for authorized users. The router also supports Virtual Private Network (VPN) functionality, allowing remote users to connect securely to the corporate network. This feature ensures that sensitive data remains protected, particularly important in today’s cyber threat landscape.

In terms of connectivity, the 3C855 supports multiple WAN ports, making it highly flexible and capable of integrating with various types of internet connections, including DSL, cable, and fiber. This flexibility allows businesses to choose the best connectivity option for their needs, ensuring they have reliable internet access at all times. Additionally, the device features several LAN ports for connecting multiple devices directly, facilitating easy local networking.

The user-friendly interface is another highlight of the 3C855. It includes a web-based management console that simplifies configuration and monitoring, making it accessible even for those without extensive networking knowledge. The device also supports SNMP, allowing for enhanced network management and monitoring capabilities, which can be invaluable for IT departments.

In summary, the 3Com 3C855 is an all-in-one networking solution that combines advanced routing, robust security features, and ease of management. Its ability to support various types of internet connections, along with its focus on quality of service and security, makes it an ideal choice for small to medium-sized enterprises looking to optimize their network infrastructure. As businesses increasingly rely on stable and secure networking solutions, the 3C855 continues to stand out as a solid performer in the market.