ZyXEL Communications 2602HWNLI-D7A manual Pstn L Ifeline FAQ

Prestige 2602HWNLI-D7A Support Notes

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
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All contents copyright (c) 2007 ZyXEL Communications Corporation.