ZyXEL Communications P-2302HWUDL-P1 Support Notes page 79

Use NAT
Active
Server Address
Server Port
Outbound Proxy
Active
Server Address
Server Port
NAT Keep Alive
Active
Keep Alive with
SIP Proxy
Keep Alive with
Outbound Proxy
Keep Alive
Interval
you one.Otherwise, keep the default value.
Select this if you want the ZyXEL Device to send SIP traffic to a specific
NAT router. You must also configure the NAT router to forward traffic with
the specified port to the ZyXEL Device. This eliminates the need for STUN
or a SIP ALG.
Enter the public IP address or domain name of the NAT router.
Enter the port number that your SIP sessions use with the public IP address
of the NAT router.
Select this if your VoIP service provider has a SIP outbound server to
handle the voice calls. This allows the ZyXEL Device to work with any type
of NAT router and eliminates the need for STUN or a SIP ALG. Turn off any
SIP ALG on a NAT router in front of the ZyXEL Device to keep it from
retranslating the IP address (since this is already handled by the outbound
proxy server).
Enter the IP address or domain name of the SIP outbound proxy server.
Enter the SIP outbound proxy server's listening port, if your VoIP service
provider gave you one. Otherwise, keep the default value.
Select this to stop NAT routers between the ZyXEL Device and SIP server
(a SIP proxy server or outbound proxy server) from dropping the SIP
session. The ZyXEL Device does this by sending SIP notify messages to
the SIP server based on the specified interval.
Select this if the SIP server is a SIP proxy server.
Select this if the SIP server is an outbound proxy server. You must enable
Outbound Proxy to use this.
Enter how often (in seconds) the ZyXEL Device should send SIP notify
messages to the SIP server.
All contents Copyright  2007 ZyXEL Communications Corporation.
P2302HWUDL-P1 Support Notes
79