ZyXEL p-2302hwdl-p1 User Manual

ZyXEL

Prestige 2302 Support Notes

All contents copyright (c) 2005 ZyXEL Communications Corporation.

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Does the Prestige support DDNS wildcard?................................................93

Can VPN tunnels still work on a Prestige using SUA? ...............................93

How do I set up my Prestige to route IPsec packets over SUA? .................93

VoIP FAQ .............................................................................................................93

What is Voice over IP?.................................................................................93

How does Voice over IP work? ....................................................................94

Why use VoIP?.............................................................................................94

In addition, it would take a much longer time, more effort and money to

implement new features using circuit switching. Since the IP technology is

a standard and various applications are available, it is easier and more

cost-effective to integrate new services and applications using IP. .............94

What is the relationship between codec and VoIP? .....................................94

What advantage does Voice over IP provide?..............................................94

What is the difference between H.323 and SIP?..........................................94

Can H.323 and SIP interoperate with each other? .......................................95

What is voice quality?..................................................................................95

How are voice quality normally rated?........................................................95

What is codec? .............................................................................................95

What is the relationship between codec and VoIP? .....................................95

What codec types does Prestige support? ....................................................95

Which codec should I choose?.....................................................................96

What do I need in order to use SIP? ............................................................96

I am unable to register to a SIP server .........................................................96

I can register to the SIP server but cannot establish a call ...........................96

I can make or receive a call but the voice traffic only goes one way, not

both way.......................................................................................................97

I have tried all the troubleshooting steps, but still cannot register to the SIP

server. What should I do next?.....................................................................97

What should I do if there may be a hardware problem with my Prestige? ..97

Trouble Shooting ........................................................................................................98

Unable to Get WAN IP from ISP .........................................................................98

Using Embedded Packet Trace ..........................................................................101

Debugging PPPoE Connection ..........................................................................116

CLI Command List..................................................................................................128