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| Chapter 11 Voice |
| Table 54 VoIP > SIP Settings > Advanced | |
| LABEL | DESCRIPTION |
| Enable | Select this if your VoIP service provider has a SIP outbound server to handle voice |
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| calls. This allows the ZyXEL Device to work with any type of NAT router and |
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| eliminates the need for STUN or a SIP ALG. Turn off any SIP ALG on a NAT |
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| router in front of the ZyXEL Device to keep it from retranslating the IP address |
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| (since this is already handled by the outbound proxy server). |
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| 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 |
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| gave you one. Otherwise, keep the default value. |
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| MWI (Message |
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| Waiting |
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| Indication) |
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| Enable | Select this if you want to hear a waiting (beeping) dial tone on your phone when |
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| you have at least one voice message. Your VoIP service provider must support |
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| this feature. |
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| Expiration Time | Keep the default value for this field, unless your VoIP service provider tells you to |
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| change it. Enter the number of seconds the SIP server should provide the |
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| message waiting service each time the ZyXEL Device subscribes to the service. |
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| Before this time passes, the ZyXEL Device automatically subscribes again. |
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| Fax Option | This field controls how the ZyXEL Device handles fax messages. |
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| G.711 Fax | Select this if the ZyXEL Device should use G.711 to send fax messages. The peer |
| Passthrough | devices must also use G.711. |
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| T.38 Fax Relay | Select this if the ZyXEL Device should send fax messages as UDP or TCP/IP |
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| packets through IP networks. This provides better quality, but it may have inter- |
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| operability problems. The peer devices must also use T.38. |
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| Call Forward |
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| Call Forward | Select which call forwarding table you want the ZyXEL Device to use for incoming |
| Table | calls. You set up these tables in VoIP > Phone Book > Incoming Call Policy. |
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| Caller Ringing |
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| Enable | Select the check box if you want to specify what tone people hear when they call |
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| you. The ZyXEL Device provides a default tone, but you can add additional tones |
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| using IVR. See Section 11.2.9 on page 153 for more information. |
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| Caller Ringing | Select the tone you want people to hear when they call you. You should set up |
| Tone | these tones using IVR first. See Section 11.2.9 on page 153 for more information. |
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| On Hold |
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| Enable | Select the check box if you want to specify what tone people hear when you put |
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| them on hold. The ZyXEL Device provides a default tone, but you can add |
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| additional tones using IVR. See Section 11.2.9 on page 153 for more information. |
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| On Hold Tone | Select the tone you want people to hear when you put them on hold. You should |
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| setup these tones using IVR first. See Section 11.2.9 on page 153 for more |
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| information. |
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| Back | Click this to return to the SIP Settings screen without saving your changes. |
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| Apply | Click this to save your changes and to apply them to the ZyXEL Device. |
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| Cancel | Click this to set every field in this screen to its |
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| 159 |
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