Prestige 2302RL Support Notes
All contents copyright (c) 2007 ZyXEL Communications Corporation.
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1. A high-speed Internet connection. You can connect to the Internet using a cable or DSL modem. Or subscribe
to high-speed network services such as ISDN, DSL or T-1. The bandwidth requirement varies depending on
the amount of traffic in your network.
2. A PC with VoIP software installed or an external VoIP gateway (such as an ATA or the Prestige 2602 VoIP
station router).
3. An account from a VoIP services provider (such as an ITSP). The account can be configured to recognize
your calls automatically, or you can require the users to enter their assigned unique account numbers.
I am unable to register to a SIP server
If you are unable to register to a SIP server, do the following.
1. Make sure the Internet connection is up and that you are able to ping the SIP register server from the LAN
behind the Prestige. If your register server uses a domain name, make sure DNS name can be resolved. If you
are using a static WAN IP address, make sure the DNS server is configured correctly on your Prestige.
2. Make sure the SIP account is correct and the password is entered correctly. They may be case-sensitive.
3. Check if there is a NAT router install before the Prestige which is a VoIP station gateway. It is NOT
recommended that you install a NAT router in front of the Prestige as this may cause unexpected problems. If
you still want to install a NAT router, use a VoIP ATA (VoIP Analog Telephone Adapter), such as the Prestige
ATA series, instead.
I can register to the SIP server but cannot establish a call
If you are able to register to the SIP server but cannot make a call through the Prestige, it is very likely there a
NAT router or a firewall blocks the traffic.
It is NOT recommended that you install a NAT router in front of the Prestige as this may cause unexpected
problems. If you still want to install a NAT router, use a VoIP ATA (VoIP Analog Telephone Adapter), such as
the Prestige ATA series, instead.
I can make or receive a call but the voice traffic only goes one way, not both way
If you can register to a server and can only make an out- going call but cannot receive incoming calls or the
incoming call signal establishment can be made but the voice traffic only goes one way, there is very likely a
NAT/firewall router installed before the Prestige. Refer to the NAT/firewall related questions for more
information.