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111
If you select EtherWAN as the interface type, the following screen appears.
Figure 19
Broadband Add/Edit: Bridge (Ethernet)
The following table describes the fields in this screen.
Maximum
Burst Size
Maximum Burst Size (MBS) refers to the maximum number of cells
that can be sent at the peak rate. Type the MBS, which is less than
65535.
This field is available only when you select
Non Realtime VBR
or
Realtime VBR
.
Apply
Click
Apply
to save your changes.
Back
Click
Back
to return to the previous screen.
Table 10
Broadband Add/Edit: Bridge (Ethernet)
Label
DESCRIPTION
General
Name
Enter a service name of the connection.
Type
Select
EtherWAN
as
the interface for which you want to configure The
ZyXEL Device transmits data over the Ethernet WAN port. Select this if
you have a DSL router or modem in your network already.
Mode
Select
Bridge
when your ISP provides you more than one IP address
and you want the connected computers to get individual IP address
from ISP’s DHCP server directly. If you select
Bridge
, you cannot use
routing functions, such as QoS, Firewall, DHCP server and NAT on
traffic from the selected LAN port(s).
VLAN
This section is available only when you select
EtherWAN
in the
Type
field.
Table 9
Broadband Add/Edit: Bridge (ADSL) (continued)
Label
DESCRIPTION
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5.3
The 3G Backup Screen
Use this screen to configure your 3G settings. Click
Broadband > 3G Backup
.
At the time of writing, the 3G card you can use in the ZyXEL Device is Huawei
E220.
Note: The actual data rate you obtain varies depending the 3G card you use, the
signal strength to the service provider’s base station, and so on.
Enable VLAN
Select this to add the VLAN Tag (specified below) to the outgoing
traffic through this connection.
Enter 802.1P
Priority
IEEE 802.1p defines up to 8 separate traffic types by inserting a tag
into a MAC-layer frame that contains bits to define class of service.
Type the IEEE 802.1p priority level (from 0 to 7) to add to traffic
through this connection. The greater the number, the higher the
priority level.
Enter 802.1Q
VLAN ID
Type the VLAN ID number (from 1 to 4094) for traffic through this
connection.
Bridge Group
Select the LAN/WLAN port(s) from which traffic will be forwarded to
the WAN interface directly.
Select a port from the
Available LAN/WLAN Port(s)
list and click
Add >>
to add it to the
Bridged LAN/WLAN Port(s)
list.
If you want to remove a port from the
Bridged LAN/WLAN Port(s)
list, select it and click
Remove <<
.
You cannot configure a QoS class for traffic from the LAN port which is
selected here.
Apply
Click
Apply
to save your changes.
Back
Click
Back
to return to the previous screen.
Table 10
Broadband Add/Edit: Bridge (Ethernet) (continued)
Label
DESCRIPTION
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Chapter 5 Broadband
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113
If the signal strength of a 3G network is too low, the 3G card may switch to an
available 2.5G or 2.75G network. Refer to
Section 5.4 on page 114
for a
comparison between 2G, 2.5G, 2.75G and 3G wireless technologies.
Figure 20
Broadband > 3G Backup
The following table describes the labels in this screen.
Table 11
Broadband > 3G Backup
LABEL
DESCRIPTION
3G Backup
Select
Enable 3G Backup
to have the ZyXEL Device use the 3G
connection as your WAN or a backup when the wired WAN connection
fails.
Card Description
This field displays the manufacturer and model name of your 3G card
if you inserted one in the ZyXEL Device. Otherwise, it displays
N/A
.
Username
Type the user name (of up to 70 ASCII printable characters) given to
you by your service provider.
Password
Type the password (of up to 70 ASCII printable characters) associated
with the user name above.
PIN
A PIN (Personal Identification Number) code is a key to a 3G card.
Without the PIN code, you cannot use the 3G card.
If your ISP enabled PIN code authentication, enter the 4-digit PIN
code (0000 for example) provided by your ISP. If you enter the PIN
code incorrectly, the 3G card may be blocked by your ISP and you
cannot use the account to access the Internet.
If your ISP disabled PIN code authentication, leave this field blank.
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5.4
Technical Reference
The following section contains additional technical information about the ZyXEL
Device features described in this chapter.
Dial String
Enter the phone number (dial string) used to dial up a connection to
your service provider’s base station. Your ISP should provide the
phone number.
For example, *99# is the dial string to establish a GPRS or 3G
connection in Taiwan.
APN Code
Enter the APN (Access Point Name) provided by your service provider.
Connections with different APNs may provide different services (such
as Internet access or MMS (Multi-Media Messaging Service)) and
charge method.
You can enter up to 31 ASCII printable characters. Spaces are
allowed.
Connection
Select
Nailed-UP
if you do not want the connection to time out.
Select
On-Demand
if
you do not want the connection up all the time
and specify an idle time-out in the
Max Idle Timeout
field.
Max Idle Timeout
This value specifies the time in minutes that elapses before the ZyXEL
Device automatically disconnects from the ISP.
Obtain an IP
Address
Automatically
Select this option If your ISP did not assign you a fixed IP address.
Use the following
static IP address
Select this option If the ISP assigned a fixed IP address.
IP Address
Enter your WAN IP address in this field if you selected
Use the
following static IP address
.
Obtain DNS info
dynamically
Select this to have the ZyXEL Device get the DNS server addresses
from the ISP automatically.
Use the following
static DNS IP
address
Select this to have the ZyXEL Device use the DNS server addresses
you configure manually.
Primary DNS
server
Enter the first DNS server address assigned by the ISP.
Secondary
DNS server
Enter the second DNS server address assigned by the ISP.
Apply
Click
Apply
to save your changes back to the ZyXEL Device.
Cancel
Click
Cancel
to return to the previous configuration.
Table 11
Broadband > 3G Backup (continued)
LABEL
DESCRIPTION
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Encapsulation
Be sure to use the encapsulation method required by your ISP. The ZyXEL Device
can work in bridge mode or routing mode. When the ZyXEL Device is in routing
mode, it supports the following methods.
IP over Ethernet
IP over Ethernet (IPoE) is an alternative to PPPoE. IP packets are being delivered
across an Ethernet network, without using PPP encapsulation. They are routed
between the Ethernet interface and the WAN interface and then formatted so that
they can be understood in a bridged environment. For instance, it encapsulates
routed Ethernet frames into bridged Ethernet cells.
PPP over Ethernet
Point-to-Point Protocol over Ethernet (PPPoE) provides access control and billing
functionality in a manner similar to dial-up services using PPP. PPPoE is an IETF
standard (RFC 2516) specifying how a personal computer (PC) interacts with a
broadband modem (DSL, cable, wireless, etc.) connection.
For the service provider, PPPoE offers an access and authentication method that
works with existing access control systems (for example RADIUS).
One of the benefits of PPPoE is the ability to let you access one of multiple network
services, a function known as dynamic service selection. This enables the service
provider to easily create and offer new IP services for individuals.
Operationally, PPPoE saves significant effort for both you and the ISP or carrier, as
it requires no specific configuration of the broadband modem at the customer site.
By implementing PPPoE directly on the ZyXEL Device (rather than individual
computers), the computers on the LAN do not need PPPoE software installed,
since the ZyXEL Device does that part of the task. Furthermore, with NAT, all of
the LANs’ computers will have access.
RFC 1483
RFC 1483 describes two methods for Multiprotocol Encapsulation over ATM
Adaptation Layer 5 (AAL5). The first method allows multiplexing of multiple
protocols over a single ATM virtual circuit (LLC-based multiplexing) and the second
method assumes that each protocol is carried over a separate ATM virtual circuit
(VC-based multiplexing). Please refer to RFC 1483 for more detailed information.

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