ZyXEL Communications Prestige 2602R Series, Руководство пользователя

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Prestige 2602R Series User’s Guide
Chapter 1 Getting To Know Your Prestige 43
Network Address Translation (NAT)
Network Address Translation (NAT) allows the translation of an Internet protocol address
used within one network (for example a private IP address used in a local network) to a
different IP address known within another network (for example a public IP address used on
the Internet).
Content Filtering
Content filtering allows you to block access to Internet web sites that contain key words (that
you specify) in the URL. You can also schedule when the Prestige should perform the filtering
and give trusted LAN IP addresses unfiltered Internet access.
REN
A Ringer Equivalence Number is used to determine the number of devices that may be
connected to the telephone line. The Prestige can support three devices per telephone port.
Dynamic Jitter Buffer
The Prestige 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 Prestige allows you to simultaneously use multiple voice (SIP) accounts and assign them
to one or both telephone ports.
Multiple Voice Channels
The Prestige can simultaneously handle multiple voice channels (telephone calls).
Additionally you can answer an incoming phone call on a VoIP account, even while someone
else is using the account for a phone call.
Voice Activity Detection/Silence Suppression
Voice Activity Detection (VAD) reduces the bandwidth that a call uses by not transmitting
when you are not speaking.
Comfort Noise Generation
The Prestige generates background noise to fill moments of 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).
Echo Cancellation
The Prestige 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.