I Have Tried All The Troubleshooting Steps, But Still Cannot Register To The Sip Server. What Should I Do Next - ZyXEL Communications Prestige 2302RL Support Notes

Prestige 2302RL Support Notes
I have tried all the troubleshooting steps, but still cannot register to the SIP server. What
should I do next?
In this case, contact your local service provider for support. If they cannot solve your problem, they will send
your problem to the ZyXEL global technical support center. help out the problem they will escalate your
problem to ZyXEL tech center.
To help us solve your problem quickly, please prepared the following information.
1. Serial number of the device.
2. SIP Call server type and service provider.
3. Your device firmware version and romfile (or the configuration file) with the administrator login password.
4. Detail information of what you have tried to resolve the problem.
What should I do if there may be a hardware problem with my Prestige?
Refer to the troubleshooting section in the user's guide for basic hardware troubleshooting and diagnostic
tips. If the hardware problem persists after you have followed the User's Guide to remedy the problem,
contact your ZyXEL local vendor and send the device in for service (with an RMA number).
Trouble Shooting
Unable to Get WAN IP from ISP
My Prestige cannot obtain an IP address from the ISP for Internet access, what should I do?
There are various ways your ISP controls user access and login. Once a user has successfully logged into, the
ISP will provide the WAN IP address to the user.
The following lists the methods ISP's authenticates users.
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