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Prestige 2602HWNLI-D7A Support Notes
All contents copyright (c) 2007 ZyXEL Communications Corporation.
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What is DDNS wildcard? ................................................................................................................................................... 191
Does the Prestige support DDNS wildcard? ...................................................................................................................... 191
Can the Prestige SUA handle IPsec packets sent by the VPN gateway behind Prestige? .................................................. 191
How do I setup my Prestige for routing IPsec packets over SUA? ..................................................................................... 192
PSTN LIFELINE FAQ ................................................................................................................................................................... 192
What is P2602 and what is the difference between P2602HW and P2602HWNLI? ......................................................... 192
What does Lifeline mean? ................................................................................................................................................ 192
Do I need Lifeline? ............................................................................................................................................................ 192
Can I connect more than one phone on the phone port? ................................................................................................. 192
Can I receive incoming PSTN call through P2602HWNLI- D7A? ....................................................................................... 192
Can I make an outgoing PSTN call through P2602HWNLI – D7A? .................................................................................... 193
VOIP FAQ ................................................................................................................................................................................ 193
What is Voice over IP? ...................................................................................................................................................... 193
How does Voice over IP work? .......................................................................................................................................... 193
Why use VoIP? .................................................................................................................................................................. 193
What is the relationship between codec and VoIP? ......................................................................................................... 193
What advantage does Voice over IP can provide? ........................................................................................................... 194
What is the difference between H.323 and SIP? .............................................................................................................. 194
Can H.323 and SIP interoperate with one another? ......................................................................................................... 194
What is voice quality? ...................................................................................................................................................... 194
How are voice quality normally rated?............................................................................................................................. 194
What is codec? ................................................................................................................................................................. 194
What is the relation of codec and VoIP? .......................................................................................................................... 195
What codec does Prestige support? ................................................................................................................................. 195
Which codec should I choose? .......................................................................................................................................... 195
What do I need in order to use SIP? ................................................................................................................................. 195
Unable to register with the SIP server? ............................................................................................................................ 196
I can register but can not establish a call? ....................................................................................................................... 196
I can make a call but the voice only goes one way not bothway? .................................................................................... 196
I can receive a call but the voice only goes one way not bothway? ................................................................................. 196
If all the about have been tried, but register still fail what should I do? .......................................................................... 196
I suspect there is a hardware problem with my Prestige what should I do? .................................................................... 197
FIREWALL FAQ .......................................................................................................................................................................... 197
What is a network firewall? ............................................................................................................................................. 197
What makes Prestige firewall secure? ............................................................................................................................. 197
What are the basic types of firewalls? ............................................................................................................................. 197
What kind of firewall is the Prestige? ............................................................................................................................... 198