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Page 91 / 427 Scroll up to view Page 86 - 90
P-2602H(W)(L)-DxA Series User’s Guide
Chapter 6 Status Screens
91
Tx B/s
This field displays how quickly the ZyXEL Device has transmitted packets in the
current call. The rate is the average number of bytes transmitted per second.
Rx B/s
This field displays how quickly the ZyXEL Device has received packets in the
current call. The rate is the average number of bytes transmitted per second.
Poll Interval(s)
Enter how often you want the ZyXEL Device to update this screen, and click
Set
Interval
.
Set Interval
Click this to make the ZyXEL Device update the screen based on the amount of
time you specified in
Poll Interval
.
Stop
Click this to make the ZyXEL Device stop updating the screen.
Table 25
VoIP Statistics
LABEL
DESCRIPTION
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Chapter 6 Status Screens
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Chapter 7 WAN Setup
93
C
HAPTER
7
WAN Setup
This chapter describes how to configure WAN settings.
7.1
WAN Overview
A WAN (Wide Area Network) is an outside connection to another network or the Internet.
7.1.1
Encapsulation
Be sure to use the encapsulation method required by your ISP. The ZyXEL Device supports
the following methods.
7.1.1.1
ENET ENCAP
The MAC Encapsulated Routing Link Protocol (ENET ENCAP) is only implemented with the
IP network protocol. IP packets 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 ATM cells. ENET ENCAP
requires that you specify a gateway IP address in the
ENET ENCAP Gateway
field in the
second wizard screen. You can get this information from your ISP.
7.1.1.2
PPP over Ethernet
The ZyXEL Device supports PPPoE (Point-to-Point Protocol over Ethernet). PPPoE is an
IETF Draft standard (RFC 2516) specifying how a personal computer (PC) interacts with a
broadband modem (DSL, cable, wireless, etc.) connection. The
PPPoE
option is for a dial-up
connection using PPPoE.
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.
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94
Chapter 7 WAN Setup
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.
7.1.1.3
PPPoA
PPPoA stands for Point to Point Protocol over ATM Adaptation Layer 5 (AAL5). A PPPoA
connection functions like a dial-up Internet connection. The ZyXEL Device encapsulates the
PPP session based on RFC1483 and sends it through an ATM PVC (Permanent Virtual
Circuit) to the Internet Service Provider’s (ISP) DSLAM (digital access multiplexer). Please
refer to RFC 2364 for more information on PPPoA. Refer to RFC 1661 for more information
on PPP.
7.1.1.4
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.
7.1.2
Multiplexing
There are two conventions to identify what protocols the virtual circuit (VC) is carrying. Be
sure to use the multiplexing method required by your ISP.
7.1.2.1
VC-based Multiplexing
In this case, by prior mutual agreement, each protocol is assigned to a specific virtual circuit;
for example, VC1 carries IP, etc. VC-based multiplexing may be dominant in environments
where dynamic creation of large numbers of ATM VCs is fast and economical.
7.1.2.2
LLC-based Multiplexing
In this case one VC carries multiple protocols with protocol identifying information being
contained in each packet header. Despite the extra bandwidth and processing overhead, this
method may be advantageous if it is not practical to have a separate VC for each carried
protocol, for example, if charging heavily depends on the number of simultaneous VCs.
7.1.3
VPI and VCI
Be sure to use the correct Virtual Path Identifier (VPI) and Virtual Channel Identifier (VCI)
numbers assigned to you. The valid range for the VPI is 0 to 255 and for the VCI is 32 to
65535 (0 to 31 is reserved for local management of ATM traffic). Please see the appendix for
more information.
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Chapter 7 WAN Setup
95
7.1.4
IP Address Assignment
A static IP is a fixed IP that your ISP gives you. A dynamic IP is not fixed; the ISP assigns you
a different one each time. The Single User Account feature can be enabled or disabled if you
have either a dynamic or static IP. However the encapsulation method assigned influences
your choices for IP address and ENET ENCAP gateway.
7.1.4.1
IP Assignment with PPPoA or PPPoE Encapsulation
If you have a dynamic IP, then the
IP Address
and
ENET ENCAP Gateway
fields are not
applicable (N/A). If you have a static IP, then you
only
need to fill in the
IP Address
field and
not
the
ENET ENCAP Gateway
field.
7.1.4.2
IP Assignment with RFC 1483 Encapsulation
In this case the IP Address Assignment
must
be static with the same requirements for the
IP
Address
and
ENET ENCAP Gateway
fields as stated above.
7.1.4.3
IP Assignment with ENET ENCAP Encapsulation
In this case you can have either a static or dynamic IP. For a static IP you must fill in all the
IP
Address
and
ENET ENCAP Gateway
fields as supplied by your ISP. However for a
dynamic IP, the ZyXEL Device acts as a DHCP client on the WAN port and so the
IP
Address
and
ENET ENCAP Gateway
fields are not applicable (N/A) as the DHCP server
assigns them to the ZyXEL Device.
7.1.5
Nailed-Up Connection (PPP)
A nailed-up connection is a dial-up line where the connection is always up regardless of traffic
demand. The ZyXEL Device does two things when you specify a nailed-up connection. The
first is that idle timeout is disabled. The second is that the ZyXEL Device will try to bring up
the connection when turned on and whenever the connection is down. A nailed-up connection
can be very expensive for obvious reasons.
Do not specify a nailed-up connection unless your telephone company offers flat-rate service
or you need a constant connection and the cost is of no concern.
7.1.6
NAT
NAT (Network Address Translation - NAT, RFC 1631) is the translation of the IP address of a
host in a packet, for example, the source address of an outgoing packet, used within one
network to a different IP address known within another network.

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