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TW-EA510 version 4 ADSL2+, WLAN 802.11g, VPN, Firewall Router
Chapter 4:Configuration
45
Authentication Protocol:
Default is Chap (Auto). Your ISP will advise you whether to use Chap or Pap
.
Connection:
±
Always on:
If you want the router to establish a PPPoE session when starting up and to
automatically re-establish the PPPoE session when disconnected by the ISP.
±
Connect on Demand:
If you want to establish a PPPoE session only when there is a packet
requesting access to the Internet (i.e. when a program on your computer attempts to access the
Internet).
Idle Timeout:
Auto-disconnect the broadband firewall gateway when there is no activity on the line for a
predetermined period of time.
±
Detail:
You can define the destination port and packet type (TCP/UDP) without checking by timer.
It allows you to set which outgoing traffic will not trigger and reset the idle timer.
RIP:
RIP v1, RIP v2, and RIP v2 Multicast. Check to enable RIP function.
MTU:
Maximum Transmission Unit. The size of the largest datagram (excluding media-specific headers)
that IP will attempt to send through the interface.
TCP MSS Clamp:
This option helps to discover the optimal MTU size automatically. Default is enabled.
MAC Address Spoofing:
This option is required by some service providers. You must fill in the MAC
address that specify by service provider when it is required. Default is disabled.
Page 47 / 110
TW-EA510 version 4 ADSL2+, WLAN 802.11g, VPN, Firewall Router
Chapter 4:Configuration
46
PPPoE with Pass-through Connections
PPPoE with pass-through adapts the following method: PPPoE Routed mode + 1483 Bridge Mode. With
pure PPPoE connection, the router can get one WAN address to the router.
With the PPPoE and
PPPoE pass-through, concurrently, it allows user to have a WAN address assigned to the router but also
able to get another WAN IP from ISP using PPPoE dialer (e.g WinPoETor Windows XP PPPoE Dialer)
at the same time.
Description:
User-definable name for this connection.
VPI/VCI:
Enter the information provided by your ISP.
ATM Class:
The Quality of Service for ATM layer.
NAT:
The NAT (Network Address Translation) feature allows multiple users to access the Internet
through a single ISP account, sharing a single IP address. If users on your LAN have public IP
addresses and can access the Internet directly, the NAT function can be disabled.
Username:
Enter the username provided by your ISP. You can input up to
128
alphanumeric characters
(case sensitive). This will usually be in the format of “username@ispname” instead of simply
“username”.
Password:
Enter the password provided by your ISP. You can input up to
128
alphanumeric characters
(case sensitive).
Service Name:
This item is for identification purposes. If it is required, your ISP will provide you the
information. Maximum input is
20
alphanumeric characters.
Page 48 / 110
TW-EA510 version 4 ADSL2+, WLAN 802.11g, VPN, Firewall Router
Chapter 4:Configuration
47
IP Address:
specify if the Router can get an IP address from the Internet Server Provider (ISP)
automatically or not. Please click Obtain an IP address automatically via DHCP client to enable the
DHCP client function or click Specify an IP address to disable the DHCP client function, and specify the
IP address manually. The setting of this item is specified by your ISP.
Authentication Protocol:
Default is Chap(Auto). Your ISP will advise you whether to use Chap or Pap.
Connection:
±
Always on:
If you want the router to establish a PPPoE session when starting up and to
automatically re-establish the PPPoE session when disconnected by the ISP.
±
Connect on Demand:
If you want to establish a PPPoE session only when there is a packet
requesting access to the Internet (i.e. when a program on your computer attempts to access the
Internet).
Idle Timeout:
Auto-disconnect the broadband firewall gateway when there is no activity on the line for a
predetermined period of time.
±
Detail:
You can define the destination port and packet type (TCP/UDP) without checking by
timer. It allows you to set which outgoing traffic will not trigger and reset the idle timer.
RIP:
RIP v1, RIP v2, and RIP v2 Multicast. Check to enable RIP function.
MTU:
Maximum Transmission Unit. The size of the largest datagram (excluding media-specific headers)
that IP will attempt to send through the interface.
TCP MSS Clamp:
This option helps to discover the optimal MTU size automatically. Default is enabled.
Page 49 / 110
TW-EA510 version 4 ADSL2+, WLAN 802.11g, VPN, Firewall Router
Chapter 4:Configuration
48
DNS
A Domain Name System (DNS) contains a mapping table for domain name and IP addresses. On the
Internet, every host has a unique and user-friendly name (domain name) such as www.helloworld.com
and an IP address. An IP address is a 32-bit number in the form of
xxx.xxx.xxx.xxx
, for example
192.168.0.254. You can think of an IP address as a telephone number for devices on the Internet, and
the DNS will allow you to find the telephone number for any particular domain name. As an IP Address is
hard to remember, the DNS converts the friendly name into its equivalent IP Address.
You can obtain a Domain Name System (DNS) IP address automatically if your ISP has provided it
when you logon, check the
Enable
box. Usually when you choose PPPoE or PPPoA as your WAN - ISP
protocol, the ISP will provide the DNS IP address automatically. You may leave the configuration field
blank.
Alternatively, your ISP may provide you with an IP address of their DNS. If this is the case, you must
enter the DNS IP address manually.
If you choose one of the other three protocols
±
RFC1483 Routed/Bridged check with your ISP, it may
provide you with an IP address for their DNS server. You must enter the DNS IP address if you set the
DNS of your PC to the LAN IP address of this router.
Page 50 / 110
TW-EA510 version 4 ADSL2+, WLAN 802.11g, VPN, Firewall Router
Chapter 4:Configuration
49
ADSL
Connect Mode:
This mode will automatically detect your ADSL line code, ADSL2+, ADSL2, G.dmt,
G.lite, T1.413, AnnexM2 and AnnexM2+. But in some area, multimode cannot detect the ADSL line code
well. If it is the case, please adjust the ADSL line code to G.dmt or T1.413 first. If it still fails, please try
the other values such as ALCTL, ADI, etc.
If you still having trouble with the line, please check with your
ISP for line connect information.
Note:
If you have subscribed ADSL1 T1.413 mode line, you may go to the Advanced Options for more connection
module combinations.
Activate Line:
Aborting (false) your ADSL line and making it active (true) again for taking effect with
setting of
Connect Mode
.
Coding Gain:
It reduces router’s transmit power which will effect to router’s downstream performance.
Higher the gain will increase the downstream rate but it sometimes causes unstable ADSL line. The
configurable ADSL coding gain is from 0 dB to 7dB, or automatic.
Tx Attenuation:
It is the ADSL transmission power that the modem is using. The lower the power the
better performance in router’s upstream.
Configurable value is between 0~12.
DSP FirmwareVersion:
Current ADSL line code firmware version.
Connected:
Display current ADSL line sync status.
Operational Mode:
Display current ADSL mode standard (Operational Mode) your Router is using
when ADSL line has sync.
Annex Type:
ADSL Annex A, which works over a standard telephone line. Annex B, which works over
an ISDN line.

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