3Com 3CR856-95 Front Panel, Alert LED Orange, Flashing slowly Two seconds on, two seconds off

Page 12

Front Panel

The front panel of the Gateway contains a series of indicator lights (LEDs) that help describe the state of various networking and connection operations.

Figure 3 Cable/DSL Secure Gateway - Front Panel

1

2

3

4

LAN Status

Cable/DSL

3CR856-95

Alert

OfficeConnect Cable/DSL Secure Gateway

1 Alert 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.

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 (Two seconds on, two seconds off)

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. See “Recovering from Corrupted Software” on page 69.

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. See “Troubleshooting” on page 67.

The Alert LED will be on for a period of between three and five seconds during the power on self test. This is normal and no cause for alarm.

2 Power LED (Green)

Indicates that the Gateway is powered on.

3 Four LAN Status LEDs

Green (100 Mbps link) / Yellow (10 Mbps link)

Indicates a number of different conditions, as described below.

On The link between the port and the next piece of network equipment is OK.

Flashing The link is OK and data is being transmitted or received.

Off Indicates one of the following

nothing is connected

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Contents Page 3Com Corporation Bayfront Plaza Santa Clara, California United States Government LegendContents Troubleshooting Using DiscoveryIP Addressing Safety Information End User Software Licence AgreementISP Information Index Regulatory NoticesPage About this Guide Naming ConventionConventions Icon DescriptionRelated Documentation Feedback about this User GuideProduct Registration Introducing the Officeconnect CABLE/DSL Secure Gateway OfficeConnect Cable/DSL Secure GatewayExample Network Using a Cable/DSL Secure Gateway Cable/DSL Secure Gateway AdvantagesPackage Contents Minimum System and Component RequirementsPower LED Green Front PanelAlert LED Orange Flashing slowly Two seconds on, two seconds offPower Adapter socket Rear PanelCable/DSL Status LED Ethernet Cable/DSL portPage Installing the Gateway Before you Install your GatewayIntroduction Positioning the GatewayPPPoE StaticPowering Up the Gateway Connecting the Cable/DSL Secure GatewayPage Setting UP Your Computers Obtaining an IP Address AutomaticallyWindows 2000, XP Disabling PPPoE and Pptp Client Software Windows 95, 98, MEMacintosh OS 8.5 Disabling Web Proxy Internet PropertiesPage Running the Setup Wizard Accessing the WizardSetting the Password Welcome ScreenSetting the Time Zone To set the Gateway to World Time UTCAuto-Configuration Settings Internet SettingsStatic IP Mode Dynamic IP Address ModePPPoE Mode Connection, use the following procedurePptp Mode Pptp ScreenChoosing your LAN Settings Activating DhcpDhcp Server Setup Screen Viewing the SummaryPage Gateway Configuration Navigating Through the Gateway Configuration PagesMain Menu Option TabsPassword Screen Welcome ScreenLAN Settings Setup WizardLAN IP Settings Changing the LAN SettingsChanging the Dhcp Server Settings Dhcp Clients List Dhcp Clients ScreenInternet Settings Static IP Address DSL or CableConnection to ISP Connection to ISP ScreenConfiguring a Static IP Address Static Address Setup ScreenConfiguring a Dynamic IP Address Dynamic Address Setup ScreenConfiguring a PPPoE connection PPPoE Setup ScreenSetting up NAT Configuring a Pptp connectionSetting up One-to-Many NAT One-to-Many and One-to-One NATConfiguring the Firewall Setting up One-to-One NATVirtual Servers Menu Creating a Virtual Server Creating a Virtual DMZVirtual Servers Settings Screen PC PrivilegesTo use access control for all computers To assign different access rights for different computersSpecial Applications Special Applications ScreenAdding and Editing Special Applications Creating Custom Special ApplicationsCustom Special Applications Setup Screen Advanced Settings Screen AdvancedConfiguring VPNs Setting the VPN ModeIPSec Configuration L2TP Configuration Address Pool for Pptp and L2TP clients field enterPptp Configuration Viewing VPN ConnectionsAdding and Editing VPN Connections IPSec Connections using Remote User Access IPSec Connections using Gateway to GatewayIPSec Connection Gateway to Gateway L2TP over IPSec Connections Connection Name field enter headsalesEditing IPSec Routes Pptp ConnectionsAccessing the System Tools RestartLoading and Saving the Gateway Configuration Time ZoneUpgrade Screen Upgrading the Firmware of your GatewayViewing Status and Logs Status ScreenLog Settings Screen Obtaining Support and Feedback for your GatewayFeedback Screen Troubleshooting Browsing to the Gateway Configuration ScreensBasic Connection Checks Connecting to the Internet Forgotten PasswordAlert LED Http//192.168.1.1Frequently Asked Questions Does the Gateway support virtual private networks VPNs?Using Discovery Windows Installation 95/98/2000/Me/NTRunning the Discovery Application Discovery Finish Screen IP Addressing Internet Protocol SuiteIP Addresses and Subnet Masks Type OneHow does a Device Obtain an IP Address and Subnet Mask? Dhcp AddressingStatic Addressing Type TwoPrivate IP Addresses Auto-IP AddressingPage Technical Specifications StandardsCable Specifications System RequirementsEthernet Performance Operating SystemsSafety Information Important Safety InformationWichtige Sicherheitshinweise Consignes importantes de sécurité Page Page END User Software Licence Agreement 3Com CorporationPage Internet Characteristics Popular ISPs Connection Types ISP InformationInformation Regarding Popular ISPs Page Glossary DSL modem EthernetEthernet Address Fast EthernetIP Address IPSecL2TP over IPSec MAC AddressSwitch NetworkNetwork Interface Card NIC ProtocolTraffic WizardPage Index NumbersIeee Ietf NAT Ping VPN Page Regulatory Notices FCC Statement100 Page DUA08569-5AAA02 Published November
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3CR856-95 specifications

The 3Com 3CR856-95 is a versatile networking device designed to meet the demands of small to medium-sized businesses. As a part of the 3Com OfficeConnect series, the 3CR856-95 combines switching, routing, and security features into a compact, integrated solution that enhances network performance and reliability.

One of the main features of the 3CR856-95 is its ability to support multiple network configurations. It operates as a router and switch simultaneously, offering six Ethernet ports for wired connections, while also integrating wireless capabilities. This allows businesses to connect various devices seamlessly, including computers, printers, and smartphones, providing flexibility and convenience in a modern office environment.

The device incorporates advanced technologies such as Quality of Service (QoS) which prioritizes network traffic to ensure that bandwidth-intensive applications like video conferencing and VoIP run smoothly. This feature is essential for maintaining productivity and communication efficiency in busy office settings. Additionally, the 3CR856-95 supports both IPv4 and IPv6 protocols, making it a future-proof solution as businesses transition to the newer Internet Protocol standard.

Security is a critical consideration for any networking equipment, and the 3CR856-95 addresses this with robust measures. It includes a built-in firewall that protects the network from external threats, along with support for Virtual Private Networks (VPN), allowing secure remote access for employees working from off-site locations. Furthermore, the device supports WPA2 encryption for wireless connections, safeguarding sensitive data transmitted over the network.

Another important characteristic of the 3CR856-95 is its user-friendly interface, which simplifies the setup and management of the network. The device features a web-based management console that allows network administrators to easily configure settings, monitor traffic, and troubleshoot issues from any internet-connected device. This accessibility saves time and reduces the complexity often associated with network management.

In summary, the 3Com 3CR856-95 is a robust and feature-rich networking solution tailored for small to medium-sized businesses. With its combination of switching, routing, and security features, it provides a reliable platform for facilitating seamless communication and connectivity. Its support for advanced technologies and user-friendly management interface makes it a smart choice for organizations looking to enhance their network infrastructure.