ZyXEL Communications P-2000W V2 - Manual (Page 4)

P2000W V2 Troubleshooting Guide
All contents copyright (c) 2005 ZyXEL Communications Corporation.
Introduction
The Prestige P2000W V2 is a SIP-based VoIP wireless phone. Sending voice signals
over the Internet is called Voice over IP or VoIP. Session Initiated Protocol (SIP) is
an internationally recognized standard for implementing SIP.
The Prestige allows you to receive Voice over IP calls. You can call any landline or
mobile telephones as well as IP telephones. Calls received from IP telephone work
exactly as you would expect from traditional telephone service.
Although SIP is an internationally recognized standard there are still possibility of
interoperability issue occur with ITSP due to vendor’s different interpretation of the
SIP standard. Therefore we suggest an interoperability test with the call server is
conducted prior to device deployment.
Below are some frequently asked question which can help a better understand what is
VoIP.
Frequently Asked Question
What is VoIP?
How does VoIP work?
Why use IP for voice?
What is the relationship between codec and VoIP?
What advantage does VoIP can provide?
What is the difference between H.323 and SIP?
Can H.323 and SIP interoperate with one another?
What do I need in order to use SIP?
What is voice quality?
How are voice quality normally rated?
What is codec?
What is the relation of codec and VoIP?
Which codec should I choose?
I have press load default setting from Menu->Setting->Load Default option
from the phone cursor but the device seems not fully reset?
How do I reset the device to factory default?
What is the P2000W V2 supported Codec?
What is the P2000W V2 voice codec packet size and packet interval
relationship?
Can P2000W V2 support outbound proxy?
Can P2000W V2 support STUN?