Chapter 9 SIP
Table 63 VoIP > SIP > SIP Settings > Advanced
LABEL | DESCRIPTION |
DTMF Mode | 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 |
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STUN |
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Active | 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. |
|
|
Server Address | Enter the IP address or domain name of the STUN server provided by your VoIP |
| service provider. |
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|
Server Port | Enter the STUN server’s listening port, if your VoIP service provider gave you one. |
| Otherwise, keep the default value. |
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Use NAT |
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Active | 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. |
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|
Server Address | Enter the public IP address or domain name of the NAT router. |
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Server Port | Enter the port number that your SIP sessions use with the public IP address of the |
| NAT router. |
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Outbound Proxy |
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Active | 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). |
|
|
Server Address | Enter the IP address or domain name of the SIP outbound proxy server. |
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|
Server Port | Enter the SIP outbound proxy server’s listening port, if your VoIP service provider |
| gave you one. Otherwise, keep the default value. |
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NAT Keep Alive |
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Active | 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. |
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Keep Alive with | Select this if the SIP server is a SIP proxy server. |
SIP Proxy |
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Keep Alive with | Select this if the SIP server is an outbound proxy server. You must enable |
Outbound Proxy | Outbound Proxy to use this. |
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Keep Alive | Enter how often (in seconds) the ZyXEL Device should send SIP notify messages |
Interval | to the SIP server. |
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MWI (Message |
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Waiting |
|
Indication) |
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144 |
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