FXO & FXS Impedence Setting
You can select the FXO & FXS Impedence Setting for a different country. Please leave as default unless otherwise instructed.
Options | Description |
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FXO Port | Select Impedence for the FXO port. (only on V211) |
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FXS Port | Select Impedence for the FXS port. |
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STUN Setting
You can enable/disable the STUN feature and configure the STUN Server IP address in this page. This function can help your ATA to work properly behind a NAT device. To change these settings please follow your VoIP Service Provider’s information.
Options | Description |
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STUN | When enabled the NetComm ATA uses STUN (Simple Transversal of UDP through NAT) |
| if the unit is behind a NAT enabled router and the router has no ALG for SIP, or NONE |
| to disable STUN (VoIP Gateway is not to use STUN for NAT traversal). VoIP Gateway |
| also supports a proprietary implementation of NAT traversal where the Service provider |
| is expected to provide some relay support. If NONE is selected, then based on the |
| responses received, the VoIP Gateway will dynamically determine if the SIP Server |
| supports the proprietary implementation. |
| Note: Even when STUN is enabled, the VoIP Gateway does an automatic detection of the presence of SIP |
| ALG and disables the use of STUN. This is to avoid some media problems arising out of the behavior of |
| some ALGs when STUN is used at the user end. |
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STUN Server | Enter the IP address or host name of the STUN server. |
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STUN Port | Enter the port number on which the STUN server listens for requests from the ATA. |
| (default : 3478) |
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V110,V2�10P,V2�11,V220� User Guide | YML881Rev1 |
46 | www.netcomm.com.au |