ZyXEL Communications P-2304R-P1 Series User Manual

Appendix A Product Specifications

P-2304R-P1 Series User’s Guide

Firmware Upgrade

Download new firmware (when available) from the ZyXEL web site and 

use the web configurator, an FTP or a TFTP tool to put it on the ZyXEL 

Device.

Any IP

The Any IP feature allows a computer to access the Internet and the 

ZyXEL Device without changing the network settings (such as IP 

address and subnet mask) of the computer, when the IP addresses of 

the computer and the ZyXEL Device are not in the same subnet.  

Configuration Backup & 

Restoration

Make a copy of the ZyXEL Device’s configuration and put it back on the 

ZyXEL Device later if you decide you want to revert back to an earl

i

er 

configuration.

Network Address 

Translation (NAT)

Each computer on your network must have its own unique IP 

address.Use NAT to convert a single public IP address to multiple 

private IP addresses for

 

the computers on your network.

Port Forwarding

If you have a server (mail or web server for example) on your network, 

then use this feature to let people access it from the Internet.

DHCP (Dynamic Host 

Configuration Protocol)

Use this feature to have the ZyXEL Device assign IP addresses, an IP 

default gateway and DNS servers to computers on your network.

Dynamic DNS Support

With Dynamic DNS (Domain Name System) support, you can use a 

fixed URL, www.zyxel.com for example, with a dynamic IP address. You 

must register for this service with a Dynamic DNS service provider.

IP Multicast

IP Multicast is used to send traffic to a specific group of computers. The 

ZyXEL Device supports versions 1 and 2 of IGMP (Internet Group 

Management Protocol) used to join multicast groups (see RFC 2236).

IP Alias

IP Alias allows you to subdivide a physical network into logical networks 

over the same Ethernet interface with the ZyXEL Device itself as the 

gateway for each subnet.

Bridge Mode

The ZyXEL Device can act as a bridge, instead of a router. This change 

should not require any other changes in your existing network.

SIP ALG

The ZyXEL Device is a SIP Application Layer Gateway (ALG). It allows 

VoIP calls to pass through NAT for devices behind the ZyXEL Device 

(such as a SIP-based VoIP software application on a computer).

Multiple Telephones

You can connect more than one telephone to the ZyXEL Device’s 

telephone port(s). The Ringer Equivalence Number (REN) is used to 

determine the number of devices that may be connected to the 

telephone line. 

Dynamic Jitter Buffer

The ZyXEL Device has a built-in, adaptive buffer that helps to smooth 

out the variations in delay (jitter) for voice traffic. This helps ensure good 

voice quality for your conversations.

Multiple SIP Accounts

The ZyXEL Device allows you to simultaneously use multiple voice (SIP) 

accounts and assign them to one or more telephone ports.

STUN

Simple Traversal of User Datagram Protocol (UDP) through Network 

Address Translators (STUN) allows SIP to pass through NAT routers.

Outbound Proxy

Some VoIP service providers use a SIP outbound server to handle voice 

calls. This allows the ZyXEL Device to work from behind any type of 

NAT router and eliminates the need for STUN or a SIP ALG (Application 

Layer Gateway).

Table 111   Firmware Features