ZyXEL Communications P-2602HWLNI User Manual

 Chapter 31 Product Specifications

P-2602HWLNI User’s Guide

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.