3Com 3C855 dimensions Preparing Your Gateway for USE, Problem Solving

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1 BEFORE YOU INSTALL YOUR GATEWAY

2 PREPARING YOUR GATEWAY FOR USE

Before you install and configure your Gateway, you need the following additional information. If you do not have this information, contact your Internet Service Provider. Space is provided below for you to record this information.

If your ISP allocates IP information dynamically over PPPoE, you need your User Name and Password:

PPPoE User Name

PPPoE Password

If your ISP allocates fixed or static IP information, you need the following information:

IP Address

_______._______._______._______.

 

 

Subnet Mask

_______._______._______._______.

 

 

Default Gateway address

_______._______._______._______.

 

 

DNS address

_______._______._______._______.

 

 

 

 

Note: If your ISP allocates IP information dynamically over a protocol other then PPPoE, you do not need any further information.

PPPoE Client Software

If you have PPPoE client software installed on your computer, you will need to disable it. To do this:

1.From the Windows Start menu, select Settings > Control Panel.

2.Double click on Internet Options.

3.Select the Connections Tab. A screen similar to Figure 1 should be displayed.

4.Select the Never Dial a Connection option.

You may wish to remove the PPPoE client software from your computer to free resources, as it is not required for use with the Gateway.

Figure 1

Connecting Your Gateway

1.Connect the power adapter to the Gateway and wait for the Alert LED to stop flashing.

2.Ensure that your modem and computer are both switched on.

3.Use the supplied cable to connect the Gateway's Ethernet Cable/DSL port to the modem. Check that the Cable/DSL Status LED lights.

4.Connect your computer to one of the 10/100 LAN ports on the Gateway. Check that the LAN Port Status LED lights.

Refer to Figure 7 for an example configuration.

Running the Configuration Wizard

1.Insert the Gateway CD-ROM in the CD-ROM drive on your computer. The Discovery application will attempt to start automatically, but if it fails, click on Start, Run and enter d:\gateway-discovery.exe(where d: is your CD-ROM drive letter).

Note: Discovery will find the Gateway even if it is unconfigured or misconfigured.

2.When the Welcome screen is displayed click on Next and wait until the application discovers the Gateways connected to your LAN.

3.Figure 2 shows an example Discovered Devices screen. Highlight the Cable/DSL Gateway by clicking on it, and press Next.

4.Click on Finish to launch a web browser and display the login page for the Gateway.

5.Login using the default password admin. The Wizard will attempt to launch automatically, but if it fails, select the Wizard tab and click on the Wizard... button.

6.Where possible, the Wizard will recommend settings for most parameters. However, there are some settings which you must provide. Most of these will have been provided to you by your ISP when you set the account up. Refer to section 1 for details.

7.By default, 3Com recommends that you leave the LAN IP address for the Gateway as 192.168.1.1. However, if you should choose to change it, make a note of the new address :

Gateway's LAN IP Address

_______._______._______._______.

 

 

 

 

8.When the DHCP Server Settings page is displayed, make sure that the Enable the DHCP Server with the following settings option is selected.

Figure 2

3 CHANGING YOUR NETWORK’S CONFIGURATION

PROBLEM SOLVING

Once the Wizard has completed, the Gateway is ready for use. Before you can use it to access the Internet, you may need to make some changes to the configuration of your computers depending on how they are set up. As a minimum you must ensure that your computers are configured to obtain an IP address automatically.

To do this on Windows 95, 98 and ME

1.From the Windows Start Menu, select Settings > Control Panel.

2.Double click on Network. Select the TCP/IP item for your network card as shown in figure 5 and click on Properties.

Your existing

Cable/DSLInternet

Modem

If you are experiencing difficulties with your installation, try the following:

• Ensure all networking equipment is switched on. The Gateway

should be showing a green Power LED. If it is not, check the power

adapter connection. Do not use any power adapter with your

Gateway other than the one supplied.

To do this on Windows 2000

1.From the Windows Start Menu, select Settings > Control Panel.

2.Double click on Network and Dial-Up connections.

3.Double click on Local Area Connection.

4.Click on Properties.

5.A screen similar to Figure 3 should be displayed. Select Internet Protocol TCP/IP and click on Properties.

6.Ensure that the options Obtain an IP Address automatically, and Obtain DNS servers automatically are both selected as shown in figure 4. Click OK.

7.Restart your computer.

3.In the TCP/IP dialog, select the IP Address

tab, and ensure that Obtain IP address automatically is selected as shown in figure 6.

Click OK.

4.Restart your computer.

Figure 5

Figure 6

OfficeConnect

Cable/DSL Gateway

• Ensure the Cable/DSL Modem is connected. The Gateway

should be displaying a yellow Cable/DSL Status LED. If no LED is

displayed, check that your modem is switched on and that it is

connected to the Cable/DSL port with an Ethernet cable.

• Ensure that the computer is connected to the Gateway. The

Gateway should be displaying a green or yellow LAN Status LED. If

it is not, check that the computer is connected to one of the

Gateway's LAN ports with an Ethernet cable.

• Ensure your computer is configured correctly. Make sure that the

computer obtains an IP address automatically. See Section 3 for

details. Ensure that the NIC card is configured for autonegotiation.

• Ensure that you do not have a web proxy enabled on your

computer. Go to the Control Panel and click on Internet Options.

Figure 3

Figure 4

Accessing the Internet

Launch your web browser and attempt to contact the Gateway by typing the following URL in the location bar: http://192.168.1.1, (if you changed the IP address, use the address you allocated.) If you are able to access the Login page, then your computer has correctly received an IP address from the Gateway.

Finally, attempt to browse to an Internet web site, such as www.3com.com. If you can successfully access this site, then your computer, Gateway and internet modem have been correctly configured.

Refer to the Problem Solving section if you cannot make contact with the Gateway or the Internet.

OfficeConnect

Switch

Figure 7

Example Network with OfficeConnect Cable/DSL Gateway.

Select the Connections tab and click on the LAN Settings button at

the bottom. Make sure that the Use Proxy Server option is

unchecked

• If you are unable to access the Gateway's Web interface.

Launch a web browser and enter http://192.168.1.1. If you chose

a different IP address, use that instead. Ensure that you include the

http:// prefix.

• If you cannot remember the Gateway IP address. Run the

Gateway Discovery application from the CD-ROM. This will always

connect you to the Gateway.

For further Problem Solving and Technical Support information,

refer to the Gateway User Guide.

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Contents Positioning Your Gateway Dimensions and StandardsIntroduction About Your GatewayProblem Solving Preparing Your Gateway for USE
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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.
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