ZyXEL Communications 2304R-P1 User Manual

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Prestige 2304 Support Notes

What do I need in order to use SIP?

The minimum required to use VoIP is as follow.

1. A high-speed Internet connection. This can be a cable modem, or a high-speed network services such as

ISDN, DSL or a T-1 link. The need of the bandwidth required will depend on the amount of telephone traffic

will be in your network.

2. A PC with VoIP software installed or a hardware VoIP box such as ATA or device like Prestige 2302 VoIP

station router.

3. An account with a VoIP provider such as an ITSP. The account can be configured to recognize your calls

automatically, or you can require the users to enter their unique account numbers issued.

Unable to register with the SIP server?

If you are unable to register with SIP server.

1. Make sure the Internet is reachable and the SIP register server is reachable. If your register server uses

domain name make sure DNS name can be resolved. If you are using static WAN IP make sure DNS server is

configured correctly on your Prestige.

2. Make sure the SIP account is correct and the password is key in correctly.

3. Check if there is NAT router before it. Prestige is a VoIP station gateway. We do not suggest to have an

NAT router before it as it may cause many unexpected problem. If you have an NAT router before it we

suggest to use a VoIP ATA (VoIP Analog Telephone Adapter) such as Prestige ATA series.

I can register but can not establish a call?

If you can register to server but can not make a call very likely there is NAT router or firewall before it which is

blocking it. We do not suggest to have an NAT router before it as it may cause many unexpected problem.

If you have an NAT router before it we suggest to use a VoIP ATA (VoIP Analog Telephone Adapter) such as

Prestige ATA series.

If the problem is a firewall before it. Please check with the firewall manager, make sure the SIP protocol is

allow to pass-through firewall, and the range of RTP port is allowed through firewall.