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Chapter 4:Configuration
52
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 192.168.1.254. 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 and IPoA 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 57 / 146
Chapter 4:Configuration
53
ADSL
Connect Mode:
The default setting is
Multimode
.
This mode will automatically detect your ADSL
line code, G.dmt, G.lite, and T1.413. 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.
Activate Line:
Aborting (false) your ADSL line and making it active (true) again for taking effect
with setting of
Connect Mode
.
Coding Gain:
Configure the ADSL coding gain from 0 dB to 7dB, or automatic.
Tx Attenuation:
Setting ADSL transmission gain, the 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.
Upstream:
Display current upstream rate of your ADSL line.
Downstream:
Display current downstream rate of your ADSL line.
Page 58 / 146
Chapter 4:Configuration
54
System
There are six items within the
System
section:
Time Zone, Remote Access, Firmware Upgrade,
Backup/Restore, Restart
and
User Management.
Time Zone
The router does not have a real time clock on board; instead, it uses the Simple Network Time
Protocol (SNTP) to get the current time from an SNTP server outside your network. Choose your
local time zone, click
Enable
and click the
Apply
button. After a successful connection to the
Internet, the router will retrieve the correct local time from the SNTP server you have specified. If
you prefer to specify an SNTP server other than those in the list, simply enter its IP address as
shown above. Your ISP may provide an SNTP server for you to use.
Daylight Saving
is also known as
Summer Time Period.
Many places in the world
adapt it during
summer time to move one hour of daylight from morning to the evening in local standard time.
Check
Automatic
box to auto set your local time.
Resync Period
(in minutes) is the periodic interval the router will wait before it re-synchronizes the
router’s time with that of the specified SNTP server. In order to avoid unnecessarily increasing the
load on your specified SNTP server you should keep the poll interval as high as possible – at the
absolute minimum every few hours or even days.
Page 59 / 146
Chapter 4:Configuration
55
Remote Access
To temporarily permit remote administration of the router (i.e. from outside your LAN), select a time
period the router will permit remote access for and click
Enable.
You may change other
configuration options for the web administration interface using
Device Management
options in
the
Advanced
section of the GUI.
If you wish to permanently enable remote access, choose a time period of 0 minutes. This setting
cannot be saved into flash when timer set to zero.
Page 60 / 146
Chapter 4: Configuration
56
DO NOT power down the router or interrupt the firmware upgrading while it is
still in process.
Improper operation could damage the router.
Firmware Upgrade
Your router’s “firmware” is the software that allows it to operate and provides all its functionality.
Think of your router as a dedicated computer, and the firmware as the software it runs. Over time
this software may be improved and modified, and your router allows you to upgrade the software it
runs to take advantage of these changes.
Clicking on
Browse
will allow you to select the new firmware image file you have downloaded to
your PC. Once the correct file is selected, click Upgrade to update the firmware in your router.
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