[AusNOG] VOIP PBX Analog card advice

[Matt Perkins]

Digium still make their A4 Series Analog cards. These always worked well 
for me quite a few years back. They have on board Echo cancellation  but 
still be prepared for complaints like. "I allways get echo when i ring 
xxx" or When YYY rings there's always echo.

Matt




  On 21/01/2016 4:42 PM, paul+ausnog at oxygennetworks.com.au wrote:
>
> Hi Matt, thanks for the reply, there is no reasonable infrastructure 
> at this location other than DSL and the customer is already on an 
> amazing call deal from their current provider so there are good 
> reasons for not moving them to a VOIP trunk unfortunately.
>
> Regards
>
> Paul
>
> *From:*AusNOG [mailto:ausnog-bounces at lists.ausnog.net] *On Behalf Of 
> *Matt Perkins
> *Sent:* Thursday, 21 January 2016 4:35 PM
> *To:* ausnog at lists.ausnog.net
> *Subject:* Re: [AusNOG] VOIP PBX Analog card advice
>
> Given that most providers can port existing numbers to SIP trunks. I 
> would question the wisdom of using Analog Line cards for anything. 
> PSTN has the tendency to suffer echo due to impedance mismatching and 
> once you add the delay of voip it can be quite noticeable even with 
> top shelf hardware echo cancellation.   It's 2016 why not use a SIP 
> trunk.
>
> Matt.
>
>
>
> On 21/01/2016 4:16 PM, paul+ausnog at oxygennetworks.com.au 
> <mailto:paul+ausnog at oxygennetworks.com.au> wrote:
>
>     Afternoon all, normally we provide SIP only PBX services for
>     customers however we have been asked to provide a SIP PBX with
>     Analogue PSTN lines for inbound and outbound calls.
>
>     We normally provide Elastix as a simple cost effective PBX for
>     small customers and in general it works well for what they need.
>
>     I am looking for some wisdom from people who have installed a
>     decent 4 line card for use with Elastix before quoting the
>     customer as we had experience some time ago with timing issues
>     when using analogue cards with VOIP handsets.
>
>     Any suggestions would be appreciated.
>
>     Thanks
>
>     Paul
>
>
>
>
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>
> -- 
> /* Matt Perkins
>          Direct 1300 137 379        Spectrum Networks Ptd. Ltd.
>          Office 1300 133 299matt at spectrum.com.au <mailto:matt at spectrum.com.au>  
>                                     Level 6, 350 George Street Sydney 2000
>          Spectrum Networks is a member of the Communications Alliance & TIO
> */


-- 
/* Matt Perkins
         Direct 1300 137 379        Spectrum Networks Ptd. Ltd.
         Office 1300 133 299        matt at spectrum.com.au
                                    Level 6, 350 George Street Sydney 2000
         Spectrum Networks is a member of the Communications Alliance & TIO
*/

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