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  • Linksys Sipura FXS Gateways

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The following configuration has not been tested for PSTN failover. The FXS port is registering to a sipXecs 3sipXcom 14.10.3 PBX2 PBX and handles inbound/outbound fax transmissions as well as voice.

The first page as seen below shows the firmware and hardware version that this unit was running.

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Click on Admin Login and Advanced and then click on the SIP tab under the Voice settings. The following page will be displayed:

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Set RTP Packet Size to 0.020 and then click on the Submit All Changes button at the bottom of the page.

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Dial plans are tricky in the SPA3102. The following dial plan is an attempt to use 9 to dial through the PBX and no 9 to dial through an attached PSTN line. Just before the end of the page set the Dial Plan to:( [1-8]*xx| 9, xxxxxxx | 9, <:1>[2-9]xxxxxxxxx | 9, 1 [2-9] xxxxxxxxx | 9, 1 900 xxxxxxx !| 9, 011xxxxxx. | 1[3469]11|0|00|[2-9]xxxxxxxxx<:@gw0> xxxxxx|1xxx[2-9]xxxxx.<:@gw0> | 0<:@gw0> | [49]11<:@gw0> xxxxxxS0|xxxxxxxxxxxx.)

Click on 'Submit All Changes' when done with this page.

All of these settings can be seen in the following three screen shots:

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If your DNS is configured properly the gateway should register and be able to make calls at this point.

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I think that is all I changed from the defaults, and these settings work on both of my PAP2's. For some reason this does not work consistent with all the Linksys/Sipura models, for example I ended up using different settings on a SPA 2100.