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Page 31 / 67 Scroll up to view Page 26 - 30
DSL-2520U
ADSL2/2+ Router with USB and Ethernet Ports
User Manual
Configuring via Web-based Interface
Parameter
Description
General settings
Name
A name for connection for easier identification.
Connection Type
A type of network protocol to be used by the connection. Available
values:
•
PPPoA
•
PPPoE
•
IPoE
•
IPoA
•
Bridge.
Enable
Select the checkbox to enable the connection.
Direction
The direction of this connection.
Physical layer
Physical interface
A physical or virtual interface to which the new connection will be
assigned. Leave the
Create
value to create a new interface at the
physical layer.
VPI
Virtual Path Identifier.
The valid range is from 0 to 250.
VCI
Virtual Circuit Identifier.
The valid range is from 32 to 65535.
Encapsulation Mode
Select
LLC
or
VC
from the drop-down list.
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DSL-2520U
ADSL2/2+ Router with USB and Ethernet Ports
User Manual
Configuring via Web-based Interface
Parameter
Description
QoS
A class of traffic for this connection.
UBR
(
Unspecified Bit Rate
): The UBR service is used for applications
that allow various delays and losses of packets. It is appropriate to
use the UBR service for text/data/image transfer applications, as
well as messaging, distribution, retrieval, and remote terminal
applications.
UBR With PCR
(
Unspecified Bit Rate with Peak Cell Rate
): The UBR service is
used for applications that allow various delays and losses of
packets. The Peak Cell Rate is a determining factor in how often
cells are sent in an effort to minimize lag or jitter caused by traffic
inconsistencies. When you select this value from the drop-down list,
the
Peak Cell Rate
field is displayed. Specify a required value (in
cells per second).
CBR
(
Constant Bit Rate
): This service is used for applications that
require a constant data rate. It is mostly used for transferring
uncompressed audio and video, e.g. videoconferencing, interactive
audio (telephony), audio/video distribution (television, distance
education, e-shops), and retrieval (video-on demand, audio
libraries). When you select this value from the drop-down list, the
Peak Cell Rate
field is displayed. Specify a required value (in
cells per second).
Non Realtime VBR
(
Non-Real-time Variable Bit Rate
): This service can be used for
transferring data that have critical response-time requirements, e.g.
air ticket booking, bank transactions, and process monitoring. When
you select this value from the drop-down list, the
Peak Cell Rate
,
Sustainable Cell Rate
, and
Maximum Burst Size
fields are
displayed. Specify required values.
Realtime VBR
(
Real-time Variable Bit Rate
): This service is used for delay-
sensitive applications such as real time video. The Rt-VBR provides
higher network flexibility than the CBR service. When you select
this value from the drop-down list, the
Peak Cell Rate
,
Sustainable Cell Rate
, and
Maximum Burst Size
fields are
displayed. Specify required values.
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Page 33 / 67
DSL-2520U
ADSL2/2+ Router with USB and Ethernet Ports
User Manual
Configuring via Web-based Interface
Parameter
Description
VLAN settings
Use VLAN
Select the checkbox to allow the router to apply VLAN tagging.
VLAN priority
A priority tag for the type of traffic transmitted.
VLAN ID
An identifier for the VLAN.
The
Miscellaneous
section is displayed for all connection types except for
Bridge
.
Figure 23. The page for creating a new connection. The
Miscellaneous
section.
Parameter
Description
Miscellaneous
Enable IGMP Multicast
Select the checkbox to allow multicast traffic from the external
network (e.g. video streaming) to be received.
NAT
Select the checkbox if you want one WAN IP address to be used for
all computers of your LAN.
Firewall
Select the checkbox to enable protection against ARP and DDoS
attacks.
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DSL-2520U
ADSL2/2+ Router with USB and Ethernet Ports
User Manual
Configuring via Web-based Interface
The
PPP settings
section is displayed for the
PPPoE
and
PPPoA
connection types.
Figure 24. The page for creating a new connection. The
PPP settings
section.
Parameter
Description
PPP settings
PPP Username
A username (login) to access the Internet.
Without authorization
Select the checkbox if you don't need to enter a username and
password to access the Internet.
Password
A password to access the Internet.
Password confirmation
The confirmation of the entered password (to avoid mistypes).
Authentication
algorithm
Select a required authentication method from the drop-down list or
leave the AUTO value.
Service name
The name of the PPPoE authentication server.
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DSL-2520U
ADSL2/2+ Router with USB and Ethernet Ports
User Manual
Configuring via Web-based Interface
Parameter
Description
Dial on demand
Select the checkbox if you want the router to establish connection to
the Internet on demand. In the
Maximum idle time
field, specify
a period of inactivity (in seconds) after which the connection should
be terminated.
MTU
The maximum size of units transmitted by the interface.
PPP IP extension
This option is used by some ISPs. Contact your ISP to clarify if this
checkbox needs to be enabled.
Keep Alive
Select the checkbox if you want the router to
keep you connected to
your ISP even when the connection has been inactive for a specified
period of time. When the checkbox is selected, the
LCP interval
and
LCP fails
fields are available. Specify the required values.
Use Static IP Address
Select the checkbox if you want to use a static IP address to access
the Internet. In the
IP Address
field displayed when the checkbox
is selected, specify a static IP address.
PPP debug
Select the checkbox if you want to log
all data on PPP connection
debugging.
PPPoE pass through
Displayed for the PPPoE type only.
Select the checkbox if you want to allow PPPoE clients of
computers from your LAN to connect to the Internet through this
PPPoE connection of the router.
Interface
The name assigned to the connection by the system.
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