ZyXEL Communications P-2602HW(L) Series - Manual (Page 41)

P-2602H(W)(L)-DxA Series User’s Guide
Chapter 1 Getting To Know the ZyXEL Device 41
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.