Comtrend Corporation CT-520 Operation & User’s Manual
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Comtrend Corporation CT-520, 91 12.4 Upgrading the Homepage The homepage image file is pre-downloaded in the system by factory default. Follow the steps below to upgrade it. Step 1: Enter the MAIN/UTIL/TFTP menu. TFTP Server IP Address: Enter the TFTP Server IP address File Name: Enter the file name of the homepage TFTP option: Choose Download Application Type: Choose Homepage Step 2: Enter a parameter in the following fields. Step 3: Hold down the Ctrl-S keys to start downloading the
Comtrend Corporation CT-520, 74 STEP 2 Setup the Lan parameters by entering MAIN/CONF/INTERFACE/LAN, set the Network Type to Virtual, and enter the IP Address and Subnet Mask for the LAN. To save the parameters press ctrl-s. STEP 3 Setup ATM Interface 1 from the MAIN/CONF/INTERFACE/ATM/ATM1 menu, set the Protocol to IPOA, enter the IP Address and Subnet Mask for ATM Interface 1. To save the parameters press ctrl-s.
Comtrend Corporation CT-520, 129 Baud: One baud is one symbol (state-transition or level-transition) per second. BERT: Bit Error Rate Test. A test that compares a received pattern with a known transmitted pattern to determine the quality. Bit: A binary digit, with the value of –0 or –1. boot: Start a device. Bps: Bits per second. The speed at which bits are transmitted across a data connection. bridge: A device that links local or remote area networks together, forwarding packets based on a MAC address (compare with router). broadband: Communication channels operating at t
Comtrend Corporation CT-520, 59 Interface: (default: ANY) If ANY is selected, any of the interfaces can access the service. If you want to specify the interface through which the server provides service, you can select LAN, or ATM1 through to ATM16 Service Name: This field is used to recognize the service that the virtual server provides. The operator can define the service name as Web, E-mail, FTP and so on Service Port Number: Related to the service port, i.e. well-known port of Web server 80, FTP server 21, and SMPT 25 Private IP Address: To define the private IP address of the virtual server Private Port Number: To specify the actual port of the server in the virtual LAN.
Comtrend Corporation CT-520, 64 STEP 3 Setup ATM Interface 1 from the MAIN/CONF/INTERFACE/ATM/ATM1 menu, set the Protocol to IPOA, enter the IP Address and Subnet Mask for ATM Interface 1. To save the parameters press ctrl-s. STEP 4 Add the first Fixed IP Mapping by entering MAIN/CONF/NAT/FIXED/ADD, enter the Private IP Address and the Global IP Address. To save the parameters press ctrl-s.
Comtrend Corporation CT-520, 121 LEVEL1 LEVEL2 LEVEL3 LEVEL4 LEVEL5 LEVEL6 Default Value ROUTING STATIC ADD NETWORK/HOST ADDRESS SUBNET MASK GATEWAY ADDRESS METRIC DELETE NETWORK/HOST ADDRESS SUBNET MASK GATEWAY ADDRESS LIST NETWORK/HOST ADDRESS SUBNET MASK GATEWAY ADDRESS METRIC RIP GENERIC MODE DISABLED AUTO SUMMARY ENABLED INTERFACE LAN MODE DISABLED VERSION 2 AUTHENTICATION NONE POISON REVERSE DISABLED
48 8.2 Network Address Translation Network Address Translation (NAT) is a transparent routing function that translates a Private IP address on a LAN, into a Public address that can be used on a WAN. Static NAT defines a fixed address translation. A Private IP address is mapped to a Public IP address on a one-to-one basis. Dynamic NAT map
30 5.3 Operation The Web page follows a tree-structured design. The operational methods are similar to the console and Telnet modes. A systematic method is used to configure the router. On-screen explanations of each function or parameter are provided to help the operator to know what is being done and what can be processed next. The following bu
Comtrend Corporation CT-520, 77 8.5.5 Virtual Server Mapping To add a virtual server, enter MAIN/CONF/NAT/SERVER/ADD, enter the parameters in the fields as in the picture below: To save the parameters press ctrl-s. Note that the Interface should be set to ANY to allow all interfaces to access the server [see section 8.4.8 for details about other settings].
81 Chapter 10 DHCP 10.1 Overview The Dynamic Host Configuration Protocol (DHCP) provides a centralized approach to assigning IP address. When a workstation is configured for automatic IP address assignment, it broadcasts a request to the LAN. The router acts as the DHCP Server and responds with: An IP address and subnet mask for the workstation Th
Comtrend Corporation CT-520, 51 The conventions of PAT mode: (1). The global pool is permitted to overlap the ATM interface IP address (2). PPTP pass through is supported (3). The ATM interface IP address presents the management address of the SHDSL Router. This IP address is available for ping, telnet and Web management from the Internet. Others addresses in the global pool are unavailable. Figure 8-3 Router with PAT enabled
Comtrend Corporation CT-520, 3 Chapter 1 Introduction 1.1 Overview The CT-520 SHDSL router satisfies the needs of multiple users for small office / home office and remote office / branch office applications. It provides a symmetrical transmission speed up to 2.3 Mbps through SHDSL connection over one ordinary telephone line. In addition, it supports up to 16 virtual concurrent connections to multiple destinations. The CT-520 SHDSL router can be used for variety of applications, including video conferencing, remote training, e-commerce, and other multimedia applications. Easy configuration and monit
Comtrend Corporation CT-520, 16 Step 2: Use the up or down arrow keys to select an item. In this case, select QC. Press the right arrow key to go to the MAIN/QC menu. The text at the bottom-left of the screen, should read: PATH> MAIN/QC to indicate the directory of the current operating menu. Step 3: Use the up or down arrow key to select an item. In this case, select LAN and press the right arrow key to enter the leaf menu. The text at the bottom-left of the screen, should read: PATH> MAIN/QC/LAN Step 4: Enter a parameter in each field. For fields that include the word: TAB, e.g., Network Type (TAB), press the TAB key to select a parameter from the pre-de
104 Step 3 Go to the MAIN/QC/VC/VC1 to give a value on the VPI/VCI. (The default is 0/33.) Depending on different applications, the user can also change other parameters within the screen. (The router has maximum of 32 virtual ATM interfaces and interface ATM 1 is enabled by default.) Step 4 Go to the MAIN/QC/ISP/ISP1. Enter the following p
Comtrend Corporation CT-520, 119 LEVEL1 LELEV2 LEVEL3 LEVEL4 LEVEL5 Default Value NAT (cont.) SERVER ADD PROTOCOL TCP INTERFACE ANY SERVICE NAME SERVICE PORT NUMBER PRIVATE IP ADDRESS PRIVATE PORT NUMBER DELETE PROTOCOL TCP INTERFACE ANY SERVICE PORT NUMBER LIST PROTOCOL PRIVATE IP PRIVATE PORT SERVICE PORT INTERFACE DHCP GENERIC DHCP SERVER DISABLED DHCP START IP DHCP END IP DEFAULT GATEWAY SUBNET MASK DOMAIN NAME SERVER(1) DOMAIN N
Comtrend Corporation CT-520, 83 Chapter 11 SNMP The router supports SNMP (Simple Network Management Protocol) management. MIBs of MIB II are implemented. This chapter describes how to set the SNMP community [Section 11.1], and trap destinations [Section 11.2]. 11.1 Community Step 1: Enter MAIN/CONF/SNMP/COMMUNITY menu. Step 2: Enter a parameter in each field. The default settings for read-only read-write communities are public and private. Read-Only Community: Enter the password for read-only access (default: Public) Re
Comtrend Corporation CT-520, 46 7.3.3 Routing Table/ List Static Routes In order to validate the RIP configuration for each interface, the router provides a utility function to view the routing table located in the MAIN/UTIL/ROUTING menu. You can view the configuration of static routes at: MAIN/CONF/ROUTING/STATIC/LIST 7.4 Ping Test Utility The Ping test is used to verify the status of the network connection after the RIP or static route function is enabled. Ping sends a request message to the host and waits f
Comtrend Corporation CT-520, 34 Step 2: Follow the online explanations to configure each function. Step 3: After the parameters are set up, the page will display all the adjusted settings for the administrator to review the settings. Step 4: Click the Finish button to confirm the settings. Step 5: The system will ask the administrator to save (write) the configurations into the system flash memory and then restart the system to make the new parameters effective. Click the Save button and then the Restart button as instructed. 5.7 Utilities Click Utility to access the Utilities page. The following briefly describes the functions on the Utilities page. Ping Te
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