As always, I needed to be clearer in my description. Our only trunking is ISDN PRI. We are only using SIP/IAX internally. So, would a PAP2T (various of which I currently use for voice) work well as the bridge between our internal analogue fax and our internal Astlinux box, sending and receiving faxes externally via ISDN? Thanks Tom
_____ From: David Kerr [mailto:da...@kerr.net] Sent: 27 May 2010 14:28 To: tom.chad...@nnpa.org.uk; AstLinux Users Mailing List Subject: Re: [Astlinux-users] Faxing The answer is "it depends." I have had success with a fax machine connected to a linksys PAP2T ATA and routing through vitelity as the SIP trunk provider (with Astlinux in-between). I have had complete failure with an older Linksys/Sipura SPA-2002 and the same SIP trunk. I have both a PAP2T and SPA-2002 connected to my system and the audio quality is noticeably better on the PAP2T. In particular there is a lot of background hiss from the SPA-2002 that is not present on the PAP2T. That may also suggest that the dynamic range of the SPA-2002 is not as strong as the PAP2T. Both the background hiss and a compressed dynamic range would explain why analog fax does not work well. In addition to good A to D conversion, which the PAP2T seems to handle well, you then have to deal with the characteristics of SIP/VoIP. You may have to fiddle with settings like jitter buffer and echo cancelling and you want a high quality trunk provider. Good luck. David On Thu, May 27, 2010 at 8:17 AM, Tom Chadwin <nnpait.servi...@googlemail.com> wrote: Slightly OT... With an uncustomized 0.7.2 (1.4) on a net5501 with a berofix PRI, what is the easiest way to attach an analogue fax which currently uses one DDI on the UK PRI? Will an ATA work? Thanks Tom ---------------------------------------------------------------------------- -- _______________________________________________ Astlinux-users mailing list Astlinux-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/astlinux-users Donations to support AstLinux are graciously accepted via PayPal to pay...@krisk.org.
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