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Page 46 / 120 Scroll up to view Page 41 - 45
VoIP/(802.11g) ADSL2+ Router
Chapter 4: Configuration
IPoA Routed Connections
Description:
User-definable name for the 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 IP 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.
DHCP client:
Enable or disable the DHCP client, specifying if the router can obtain an IP address
from the Internet Service 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. Your ISP specifies the
setting of this item.
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:
It is enabled by default.
All TCP traffic routed through the interface will be
examined. If a TCP SYN (synchronize/start) segment is sent with a maximum segment size larger
than the interface MTU (Maximum Transmission Unit), the MSS option will be rewritten in order to
allow TCP traffic to pass through the interface without requiring fragmentation.
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Page 47 / 120
VoIP/(802.11g) ADSL2+ Router
Chapter 4: Configuration
PPPoE Connections
Description:
A 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.
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.
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Page 48 / 120
VoIP/(802.11g) ADSL2+ Router
Chapter 4: Configuration
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 to 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:
It is enabled by default.
All TCP traffic routed through the interface will be
examined. If a TCP SYN (synchronize/start) segment is sent with a maximum segment size larger
than the interface MTU (Maximum Transmission Unit), the MSS option will be rewritten in order to
allow TCP traffic to pass through the interface without requiring fragmentation.
47
Page 49 / 120
VoIP/(802.11g) ADSL2+ Router
Chapter 4: Configuration
Advanced Options (PPPoE)
LLC Header:
Selects encapsulation mode, true for using LLC or false for using VC-Mux.
Create Route:
This setting specifies whether a route is added to the system after IPCP (Internet
Protocol Control Protocol) negotiation is completed. If set to
enabled
, a route will be created which
directs packets to the remote end of the PPP link.
Specific Route:
Specifies whether the route created when a PPP link comes up is a specific or
default route. If set to
enabled
, the route created will only apply to packets for the subnet at the
remote end of the PPP link. The address of this subnet is obtained during IPCP negotiation.
Subnet Mask:
sets the subnet mask used for the local IP interface connected to the PPP transport.
If the value
0.0.0.0
is supplied, the netmask will be calculated from the class of the IP address
obtained during IPCP negotiation.
Route Mask:
Sets the subnet mask used by the route that is created when a PPP link comes up. If
it is set to
0.0.0.0
, the subnet mask is determined by the IP address of the remote end of the link.
The class of the IP address is obtained during IPCP (Internet Protocol Control Protocol)
negotiation.
MRU:
Maximum Receive Unit. This is negotiated during the LCP protocol stage.
Discover
Primary
/
Secondary
DNS:
This
setting
enables/disables
whether
the
primary/secondary DNS server address is requested from a remote PPP peer using IPCP. The
default setting for this command is
enabled
.
Give DNS to Relay:
Controls whether the PPP Internet Protocol Control Protocol (IPCP) can
request the DNS server IP address for a remote PPP peer. Once IPCP has discovered the DNS
server IP address, it automatically gives the address to the local DNS relay so that a connection
can be established.
Give DNS to Client:
Controls whether the PPP Internet Protocol Control Protocol (IPCP) can
request a DNS server IP address for a remote PPP peer. Once IPCP has discovered the DNS
server IP address, it automatically gives the address to the local DNS client so that a connection
can be established.
Give DNS to DHCP Server:
Similar to the above, but gives the DNS server address to the DHCP
server.
Discover Primary NBNS / Discover Secondary NBNS:
This setting enables/disables whether
the primary/secondary NBNS server address is requested from a remote PPP peer using IPCP.
The default setting for this command is disabled.
Discover Subnet Mask:
Specifies if the subnet mask given by IPCP negotiation process is to be
used.
Give Subnet Mask To DHCP Server:
Enable to change your DHCP Server settings by using the
given information in IPCP negotiation process.
48
Page 50 / 120
VoIP/(802.11g) ADSL2+ Router
Chapter 4: Configuration
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.
49

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