ZyXEL Communications MAX-206M1R User Manual

Chapter 20 Troubleshooting

User’s Guide

Check the telephone connections and telephone wire.

Make sure you have the VOICE > Service Configuration > SIP Settings 
screen properly configured (

).

I can access the Internet, but cannot make VoIP calls.

Make sure you have the VOICE > Service Configuration > SIP Settings 
screen properly configured (

).

The VoIP LED should come on. Make sure that your telephone is connected to the 
VoIP port (see the Quick Start Guide for information on connecting telephone 
cables to the these ports).

You can also check the VoIP status in the Status screen. 

If the VoIP settings are correct, use speed dial to make peer-to-peer calls. If you 
cannot make a call using speed dial, there may be something wrong with the SIP 
server. Contact your VoIP service provider.

Problems With Multiple SIP Accounts

You can set up two SIP accounts on your WiMAX Modem. By default your WiMAX 
Modem uses SIP account 1 for outgoing calls, and it uses SIP accounts 1 and 2 for 
incoming calls. With this setting, you always use SIP account 1 for your outgoing 
calls and you cannot distinguish which SIP account the calls are coming in 
through. If you want to control the use of different dialing plans for accounting 
purposes or other reasons, you need to configure your phone port in order to 
control which SIP account you are using when placing or receiving calls.

If you reset the WiMAX Modem, you lose all of the changes you have made. The 
WiMAX Modem re-loads its default settings, and the password resets to 1234. You 
have to make all of your changes again.