Check out the Linksys SPA-3102<br>-MC<br><br><div class="gmail_quote">On Mon, Aug 9, 2010 at 11:49 AM, Ken Gillett <span dir="ltr"><<a href="mailto:ken@ukgb.net">ken@ukgb.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
Well that's the alternative, but I confess to being unclear on one aspect of such devices.<br>
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In a simple scenario of several SIP devices registered to a SIP server plus a PSTN analog line, it is relatively simple to see how PSTN to VOIP bridging can be implemented with a gateway device that includes an FXS, FXO and ethernet port. An incoming call on the PSTN causes the gateway to initiate a call via the SIP server to SIP client devices registered on that ID and then putting the 2 ends of the call together so the PSTN call is 'bridged' onto VOIP and being handled by a SIP client device, i.e. a softphone or SIP telephone.<br>
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But what about the reverse? My requirement is not only for the above basic ATA, but to be able to bridge VOIP to PSTN. IOW so that a SIP client can make an outgoing call onto the PSTN. Both the gateway and the SIP client are registered to a SIP server (same one in fact), how does the SIP client place a call onto the PSTN? The gateway is not a SIP server, what is the process by which a SIP client can tell such a gateway to place a call on the PSTN to the number that is somehow provided to the gateway by the SIP client?<br>
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I am actually trying this out with a Zoom 5801 which with an FXO and FXS port and the ability to bridge in both directions can apparently do what I require, but I cannot get my head around what I am even trying to get it to do. And this is before I've even thought about bringing FreeSwitch into the equation.<br>
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I'd be grateful for any advice about this. Thanks.<br>
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On 8 Aug 2010, at 20:49, Tony Graziano wrote:<br>
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> You can always use a standalone sip gateway (patton, audiocodes, etc.).<br>
><br>
> On 8/8/10, Ken Gillett <<a href="mailto:ken@ukgb.net">ken@ukgb.net</a>> wrote:<br>
>> I asked this before, but never got any response, so hope someone can help me<br>
>> this time.<br>
>><br>
>> Is it possible to use a (USB) modem as a 'trunk' to and from the PSTN, i.e.<br>
>> be able to accept incoming PSTN calls and also make PSTN calls?<br>
>><br>
>> I plan on installing FreeSwitch on a Mac and it would be really handy to be<br>
>> able to use Apple's USB modem in this way as otherwise there's no way to add<br>
>> such PSTN functionality on the Mac Mini. Although my requirement is Mac<br>
>> based, I guess this question applies to any FreeSwitch installation.<br>
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Ken G i l l e t t<br>
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