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How does Voice over IP work? .................................................................169
Why use VoIP? ..........................................................................................169
What is the relationship between codec and VoIP?...................................170
What advantage does Voice over IP can provide?.....................................170
What is the difference between H.323 and SIP?........................................170
Can H.323 and SIP interoperate with one another?...................................170
What is voice quality?................................................................................170
How are voice quality normally rated?......................................................170
What is codec? ...........................................................................................171
What is the relation of codec and VoIP? ...................................................171
What codec does Prestige support?............................................................171
Which codec should I choose?...................................................................171
What do I need in order to use SIP? ..........................................................171
Unable to register with the SIP server?......................................................172
I can register but can not establish a call?..................................................172
I can make a call but the voice only goes one way not both way? ............172
I can receive a call but the voice only goes one way not both way? .........172
I suspect there is a hardware problem with my Prestige what should I do?173
Firewall FAQ .....................................................................................................173
What is a network firewall? .......................................................................173
What makes Prestige firewall secure? .......................................................173
What are the basic types of firewalls? .......................................................174
What kind of firewall is the Prestige?........................................................174
Why do you need a firewall when your router has packet filtering and
NAT built-in?.............................................................................................175
What is Denials of Service (DoS)attack?...................................................175
What is Ping of Death attack?....................................................................175
What is Teardrop attack? ...........................................................................175
What is SYN Flood attack?........................................................................175
What is LAND attack?...............................................................................176
What is Brute-force attack? .......................................................................176
What is IP Spoofing attack?.......................................................................176
What are the default ACL firewall rules in Prestige? ................................176
How can I protect against IP spoofing attacks? .........................................177
Content Filter FAQ ............................................................................................178
IPSec FAQ .........................................................................................................178
All contents copyright (c) 2006 ZyXEL Communications Corporation.
P-2602HWNLI Support Notes
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