ZyXEL Communications Prestige 2602R Series - Manual (Page 44)

Prestige 2602R Series User’s Guide
44 Chapter 1 Getting To Know Your Prestige
QoS (Quality of Service)
Quality of Service (QoS) mechanisms help to provide better service on a per-flow basis. The
Prestige supports Type of Service (ToS) tagging and Differentiated Services (DiffServ)
tagging. This allows the Prestige to tag voice frames so they can be prioritized over the
network.
SIP ALG
The Prestige is a SIP Application Layer Gateway (ALG). It allows VoIP calls to pass through
NAT for devices behind the Prestige (such as a SIP-based VoIP software application on a
computer).
Traffic Redirect
Traffic redirect forwards WAN traffic to a backup gateway when the Prestige cannot connect
to the Internet, thus acting as an auxiliary if your regular WAN connection fails.
Universal Plug and Play (UPnP)
Using the standard TCP/IP protocol, the Prestige and other UPnP enabled devices can
dynamically join a network, obtain an IP address and convey its capabilities to other devices
on the network.
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 the Prestige 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.
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. The Prestige has
built-in DHCP server capability enabled by default. It can assign IP addresses, an IP default
gateway and DNS servers to DHCP clients. The Prestige can now also act as a surrogate
DHCP server (DHCP Relay) where it relays IP address assignment from the actual real DHCP
server to the clients.