ZyXEL Communications P-2302R-P1C manual Use NAT, Outbound Proxy, NAT Keep Alive, Keep Alive With

P2302R-P1C Support Notes

you one.Otherwise, keep the default value.

Use NAT

			Select this if you want the ZyXEL Device to send SIP traffic to a specific
Active			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.
Server Address			Enter the public IP address or domain name of the NAT router.
Server Port			Enter the port number that your SIP sessions use with the public IP address
			of the NAT router.
Outbound Proxy
			Select this if your VoIP service provider has a SIP outbound server to
Active			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).
Server Address			Enter the IP address or domain name of the SIP outbound proxy server.
Server Port			Enter the SIP outbound proxy server’s listening port, if your VoIP service
			provider gave you one. Otherwise, keep the default value.
NAT Keep Alive
			Select this to stop NAT routers between the ZyXEL Device and SIP server
Active			(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.
Keep	Alive	with	Select this if the SIP server is a SIP proxy server.
SIP Proxy
Keep	Alive	with	Select this if the SIP server is an outbound proxy server. You must enable
Outbound		Proxy	Outbound Proxy to use this.
Keep Alive			Enter how often (in seconds) the ZyXEL Device should send SIP notify
Interval			messages to the SIP server.
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