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Echo Cancellation

You device supports G.168, an ITU-T standard for eliminating the echo caused by the sound

of your voice reverberating in the telephone receiver while you talk.

QoS (Quality of Service)

Quality of Service (QoS) mechanisms help to provide better service on a per-flow basis. Your

device supports Type of Service (ToS) tagging and Differentiated Services (DiffServ) tagging.

This allows the device to tag voice frames so they can be prioritized over the network.

SIP ALG

Your device is a SIP Application Layer Gateway (ALG). It allows VoIP calls to pass through

NAT for devices behind it (such as a SIP-based VoIP software application on a computer).

Universal Plug and Play (UPnP)

Your device and other UPnP enabled devices can use the standard TCP/IP protocol to

dynamically join a network, obtain an IP address and convey their capabilities to each other.

PPPoE Support (RFC2516)

PPPoE (Point-to-Point Protocol over Ethernet) emulates a dial-up connection. It allows your

ISP to use their existing network configuration with newer broadband technologies such as

ADSL. The PPPoE driver on your device is transparent to the computers on the LAN, which

see only Ethernet and are not aware of PPPoE thus saving you from having to manage PPPoE

clients on individual computers.

Other PPPoE Features

•

PPPoE idle time out

•

PPPoE dial on demand

Dynamic DNS Support

With Dynamic DNS support, you can have a static hostname alias for a dynamic IP address,

allowing the host to be more easily accessible from various locations on the Internet. You must

register for this service with a Dynamic DNS service provider.

DHCP

DHCP (Dynamic Host Configuration Protocol) allows the individual clients (computers) to

obtain the TCP/IP configuration at start-up from a centralized DHCP server. Your device has

built-in DHCP server capability enabled by default. It can assign IP addresses, an IP default

gateway and DNS servers to DHCP clients. Your device can also act as a surrogate DHCP

server (DHCP Relay) where it relays IP address assignment from the actual real DHCP server

to the clients.

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Chapter 1 Getting To Know the ZyXEL Device

Multiple PVC (Permanent Virtual Circuits) Support

Your device supports up to 8 Permanent Virtual Circuits (PVC’s).

IP Alias

IP alias allows you to partition a physical network into logical networks over the same

Ethernet interface. Your device supports three logical LAN interfaces via its single physical

Ethernet interface with the your device itself as the gateway for each LAN network.

IP Policy Routing (IPPR)

Traditionally, routing is based on the destination address only and the router takes the shortest

path to forward a packet.

IP Policy Routing (IPPR) provides a mechanism to override the

default routing behavior and alter the packet forwarding based on the policy defined by the

network administrator.

Packet Filters

Your device’s packet filtering function allows added network security and management.

Ease of Installation

Your device is designed for quick, intuitive and easy installation.

Housing

Your device's compact and ventilated housing minimizes space requirements, making it easy

to position anywhere in your busy office.

1.3

Wireless Features (“W” models only)

IEEE 802.11g Wireless LAN

IEEE 802.11g is fully compatible with the IEEE 802.11b standard.

This means an IEEE

802.11b radio card can interface directly with an IEEE 802.11g access point (and vice versa)

at 11 Mbps or lower depending on range. IEEE 802.11g has several intermediate rate steps

between the maximum and minimum data rates. The IEEE 802.11g data rate and modulation

are as follows:

Table 3

IEEE 802.11g

DATA RATE (MBPS)

MODULATION

1

DBPSK (Differential Binary Phase Shift Keyed)

2

DQPSK (Differential Quadrature Phase Shift Keying

)

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Note:

Your device may be prone to RF (Radio Frequency) interference from other 2.4

GHz devices such as microwave ovens, wireless phones, Bluetooth enabled

devices, and other wireless LANs.

IEEE 802.11g+ Wireless LAN

Your device supports IEEE 802.11g+ to allow any ZyXEL WLAN devices that also support

IEEE 802.1g+ to associate with the ZyXEL Device at higher transmission speeds than with

standard IEEE 802.11g.

External Antenna

The ZyXEL Device is equipped with an attached antenna to provide a clear radio signal

between the wireless stations and the access points.

Wireless LAN MAC Address Filtering

Your device can check the MAC addresses of wireless stations against a list of allowed or

denied MAC addresses.

WEP Encryption

WEP (Wired Equivalent Privacy) encrypts data frames before transmitting over the wireless

network to help keep network communications private.

Wi-Fi Protected Access

Wi-Fi Protected Access (WPA) is a subset of the IEEE 802.11i security standard. Key

differences between WPA and WEP are user authentication and improved data encryption.

WPA2

WPA 2 (IEEE 802.11i) is a wireless security standard that defines stronger encryption,

authentication and key management than WPA.

WMM QoS

WMM (Wi-Fi MultiMedia) QoS (Quality of Service) allows you to prioritize wireless traffic

according to the delivery requirements of individual services.

5.5 / 11

CCK (Complementary Code Keying)

6/9/12/18/24/36/48/54

OFDM (Orthogonal Frequency Division Multiplexing)

Table 3

IEEE 802.11g

DATA RATE (MBPS)

MODULATION

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1.4

Applications for the ZyXEL Device

Here are some example uses for which the ZyXEL Device is well suited.

1.4.1

Internet Access

Your device is the ideal high-speed Internet access solution. It supports the TCP/IP protocol,

which the Internet uses exclusively. It is compatible with all major ADSL DSLAM (Digital

Subscriber Line Access Multiplexer) providers.

A DSLAM is a rack of ADSL line cards with

data multiplexed into a backbone network interface/connection (for example, T1, OC3, DS3,

ATM or Frame Relay). Think of it as the equivalent of a modem rack for ADSL. In addition,

your device allows wireless clients access to your network resources and the Internet. A

typical Internet access application is shown below.

Figure 1

Internet Access Application

1.4.1.1

Internet Single User Account

For a SOHO (Small Office/Home Office) environment, your device offers the Single User

Account (SUA) feature that allows multiple users on the LAN (Local Area Network) to access

the Internet concurrently for the cost of a single IP address

1.4.2

Making Calls via Internet Telephony Service Provider

In a home or small office environment, you can use your device to make and receive VoIP

telephone calls through an Internet Telephony Service Provider (ITSP).

The following figure shows a basic example of how you would make a VoIP call through an

ITSP. You use your analog phone (A in the figure) and your device (B) changes the call into

VoIP. Your device then sends your call to the Internet and the ITSP’s SIP server. The VoIP

call server forwards calls to PSTN phones (E) through a trunking gateway (D) to the PSTN

network. The VoIP call server forwards calls to IP phones (F) through the Internet.

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Figure 2

Internet Telephony Service Provider Application

1.4.3

Make Peer-to-peer Calls

You can call directly to someone’s IP address without using a SIP proxy server. Peer-to-peer

calls are also called “Point to Point” or “IP-to-IP” calls. You must know the peer’s IP address

in order to do this.

The following figure shows a basic example of how you would make a peer-to-peer VoIP call.

You use your analog phone (A in the figure) and your device (B) changes the call into VoIP.

and sends the call through the Internet to the peer VoIP device (C).

Figure 3

Peer-to-peer Calling

1.4.4

Firewall for Secure Broadband Internet Access

Your device provides protection from attacks by Internet hackers. By default, the firewall

blocks all incoming traffic from the WAN. The firewall supports TCP/UDP inspection and

DoS (Denial of Services) detection and prevention, as well as real time alerts, reports and logs.