ZyXEL Communications P-2302HW-P1 Series User Manual page 151

Table 61 VoIP > SIP > SIP Settings > Advanced
LABEL
DTMF Mode
STUN
Active
Server Address
Server Port
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
Chapter 9 SIP
DESCRIPTION
Control how the ZyXEL Device handles the tones that your telephone makes when
you push its buttons. You should use the same mode your VoIP service provider
uses.
RFC 2833 - send the DTMF tones in RTP packets
PCM - send the DTMF tones in the voice data stream. This method works best
when you are using a codec that does not use compression (like G.711). Codecs
that use compression (like G.729) can distort the tones.
SIP INFO - send the DTMF tones in SIP messages
Note: In order to use the VoiP trunking feature you must set DTMF
Mode to SIP INFO.
Select this if all of the following conditions are satisfied.
• There is a NAT router between the ZyXEL Device and the SIP server.
• The NAT router is not a SIP ALG.
• Your VoIP service provider gave you an IP address or domain name for a
STUN server.
Otherwise, clear this field.
Enter the IP address or domain name of the STUN server provided by your VoIP
service provider.
Enter the STUN server's listening port, if your VoIP service provider gave 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 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.
P-2302HW/HWL-P1 Series User's Guide
151