ZyXEL Communications MAX-207HW2 User Manual page 178

Table 67 Firmware Specifications (continued)
FEATURE
Dynamic DNS Support
DHCP
IP Alias
Multiple SIP Accounts
SIP ALG
Dynamic Jitter Buffer
Voice Activity Detection/
Silence Suppression
Comfort Noise Generation Your device generates background noise to fill moments of
Echo Cancellation
Time and Date
Logging
Codecs
Fax Support
User's Guide
DESCRIPTION
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 (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.
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.
You can configure multiple voice (SIP) accounts.
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).
The built-in adaptive buffer helps to smooth out the
variations in delay (jitter) for voice traffic (up to 60 ms). This
helps ensure good voice quality for your conversations.
Voice Activity Detection (VAD) reduces the bandwidth that a
call uses by not transmitting when you are not speaking.
silence when the other device in a call stops transmitting
because the other party is not speaking (as total silence
could easily be mistaken for a lost connection).
You device supports G.168 of at least 24 ms.
This an ITU-T standard for eliminating the echo caused by the
sound of your voice reverberating in the telephone receiver
while you talk.
Get the current time and date from an external server when
you turn on your WiMAX Modem. You can also set the time
manually.
Use the WiMAX Modem's logging feature to view connection
history, surveillance logs, and error messages.
Enhanced Variable Rate Codec (EVRC), G.711 (PCM
and -law), G.729a, and G.723.1
a
T.38 FAX relay (FAX over UDP).
G.711 fax relay for fax calls and be able to renegotiate codec
to G.711 if a fax call is detected.
Chapter 18 Product Specifications
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