ZyXEL Communications P-2602HWLNI, User Manual, Page: 429 / 496

Chapter 31 Product Specifications
P-2602HWLNI User’s Guide
429
31.4 Wireless Features (Wireless Devices Only)
Multiple SIP
Accounts
You can simultaneously use multiple voice (SIP) accounts and assign them to
one or both telephone ports.
Multiple Voice
Channels
Your device 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
Your device 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 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.
MSNs You can use MSNs (Multiple Subscriber Numbers) to identify individual ISDN
phone connected to the ZyXEL Device for internal calls. Configure MSNs in the
ZyXEL Device allow analog phones to use MSN features in ISDN calls.
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).
Other Voice
Features
SIP version 2 (Session Initiating Protocol RFC 3261)
SDP (Session Description Protocol RFC 2327)
RTP (RFC 1889)
RTCP (RFC 1890)
Voice codecs (coder/decoders) G.711, G.726, G.729
Fax and data modem discrimination
DTMF Detection and Generation
DTMF: In-band and Out-band traffic (RFC 2833),(PCM), (SIP INFO)
Point-to-point call establishment between two IADs
Quick dialing through predefined phone book, which maps the phone dialing
number and destination URL.
Flexible Dial Plan (RFC3525 section 7.1.14)
Table 185 Voice Features
Table 186 Wireless Features
IEEE 802.11g+ Wireless LAN Your device supports IEEE 802.11g+ to allow any ZyXEL WLAN
devices that also support IEEE 802.1g+ to associate with the ZyXEL
Device at higher transmission speeds than with standard IEEE
802.11g.
External Antenna The ZyXEL Device is equipped with an attached antenna to provide a
clear radio signal between the wireless stations and the access
points.
Wireless LAN MAC Address
Filtering
Your device can check the MAC addresses of wireless stations
against a list of allowed or denied MAC addresses.