Which codec should i choose, What do i need in order to use sip, Unable to register with the sip server – ZyXEL Communications P-2302R-P1 User Manual
Page 115: I can register but can not establish a call
P2302R-P1 Support Notes
All contents Copyright
2007 ZyXEL Communications Corporation.
115
Which codec should I choose?
As which codec choose is depending on what codec is supported on both end of the VoIP host. Generally a
codec with low bandwidth consumption and high voice quality is a good codec .
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 P-2302 VoIP station
gateway.
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 the 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 ZyXEL Device.
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.