ZyXEL Communications 2602HWL-DXA manual Prestige 2602HWL-DxA Support Notes

Prestige 2602HWL-DxA Support Notes
Can H.323 and SIP interoperate with one another?	164
What is voice quality?	164
How are voice quality normally rated?	164
What is codec?	165
What is the relation of codec and VoIP?	165
What codec does Prestige support?	165
Which codec should I choose?	165
What do I need in order to use SIP?	165
Unable to register with the SIP server?	166
I can register but can not establish a call?	166
I can make a call but the voice only goes one way not bothway?	166
I can receive a call but the voice only goes one way not bothway?	166
If all the about have been tried, but register still fail what should I do?....	167
I suspect there is a hardware problem with my Prestige what should I do?167
Firewall FAQ	167
What is a network firewall?	167
What makes Prestige firewall secure?	167
What are the basic types of firewalls?	168
What kind of firewall is the Prestige?	168
Why do you need a firewall when your router has packet filtering and
NAT built-in?	169
What is Denials of Service (DoS)attack?	169
What is Ping of Death attack?	169
What is Teardrop attack?	169
What is SYN Flood attack?	169
What is LAND attack?	170
What is Brute-force attack?	170
What is IP Spoofing attack?	170
What are the default ACL firewall rules in Prestige?	170
How can I protect against IP spoofing attacks?	171
Content Filter FAQ	172
IPSec FAQ	172
What is VPN?	172
Why do I need VPN?	173
What are most common VPN protocols?	173
What is PPTP?	173
What is L2TP?	174
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