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Parameter
Description
VPI
VPI is a virtual path determines the way an ATM cell
should be routed. The VPI is an 8-bit (in UNI) or 12-bit (in
NNI) number that is included in the header of an ATM
cell. The valid range for the VPI is 0 to 255. Enter the VPI
assigned by the ISP.
VCI
VCI is the label given to an ATM VC to identify it and
determine its destination. The VCI is a 16-bit number that
is included in the header of an ATM cell. The valid range
for the VCI is 32 to 65535. Enter the VCI assigned by the
ISP.
QoS
UBR (Unspecified Bit Rate)
– Select UBR for
applications that are non-time sensitive, such as e-mail.
CBR (Constant Bit Rate)
– This class is used for
emulating circuit switching. The cell rate is constant with
time. Select CBR to specify fixed (always on) bandwidth
for voice or data traffic.
nrtVBR (non-real time Variable Bit Rate)
– This class
allows users to send traffic at a rate that varies with time
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depending on the availability of user information.
Statistical multiplexing is provided to make optimum use
of network resources. Multimedia e-mail is an example of
nrtVBR.
rtVBR (real time Variable Bit Rate)
– This class is
similar to nrtVBR but is designed for applications that are
sensitive to cell-delay variation. Examples for real-time
VBR are voice with speech activity detection (SAD) and
interactive compressed video.
PCR
Divide the DSL line rate (bps) by 424 (the size of an ATM
cell) to find the PCR (Peak Cell Rate). This is the
maximum rate at which the sender can send cells.
CDVT
PCR generally is coupled with the CDVT (Cell Delay
Variation Tolerance), which indicates how much jitter is
allowable.
SCR
SCR (Sustain Cell Rate) is the average rate, as
measured over a long interval, in the order of the
connection lifetime.
MBS
MBS (Maximum Burst Size) refers to the maximum
number of cells that can be sent at the peak rate. Type
the MBS, which is less than 65535.
Current ATM VC Table
The channel you have configured with regard to the ATM
settings will be listed here.
When you finish, click ‘Apply Changes’. You’ll see the following message
displayed on web browser:
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39
Press ‘Continue’ to save the settings made and back to web management
interface; press ‘Apply’ to save the settings made and restart the router so the
settings will take effect after it reboots.
5.2.2.3. ADSL Setting
The page allows you to select any combination of DSL modes.
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Parameter
Description
ADSL modulation
Choose preferred ADSL standard protocols.
AnnexL Option
Enable/Disable ADSL2/ADSL2+ Annex L capability.
AnnexM Option
Enable/Disable ADSL2/ADSL2+ Annex M capability.
ADSL Capability
Bitswap Enable
– Enable/Disable bitswap capability.
SRA Enable
– Enable/Disable SRA (seamless rate
adaptation) capability.
ADSL Tone
Choose tones to be masked. The masked tones will not
carry any data. Click “Tone Mask” to mask the tone
number you have selected or all the tone numbers.
When you finish, click ‘Apply Changes’. You’ll see the following message
displayed on web browser:
Press ‘Continue’ to save the settings made and back to web management
interface; press ‘Apply’ to save the settings made and restart the router so the
settings will take effect after it reboots.
5.2.2.4. DNS
A Domain Name System (DNS) server is like an index of IP addresses and Web
addresses. If you type a Web address into your browser, such as
“www.router.com”, a DNS server will find that name in its index and the matching
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IP address. This page is used to select the way to obtain the IP addresses of the
DNS servers.
Parameter
Description
Attain DNS
Automatically
Select this item if you want to use the DNS servers
obtained from ISP.
Set DNS Manually
Select this item to specify up to three DNS IP addresses.
When you finish, click ‘Apply Changes’. You’ll see the following message
displayed on web browser:
Press ‘Continue’ to save the settings made and back to web management
interface; press ‘Apply’ to save the settings made and restart the router so the
settings will take effect after it reboots.

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