[Asterisk-Users] SIP UA Fax device

[Dan]

Hi Simon,

One option I think about. like you, is to use something like a Cisco ATA 186
in SIP mode and a regular fax, but I want more, to receive the calls in
electronic format and to automatically distribute them to some e-mail
addresses.

> We haven't tried
> over the H.323. yet but will be doing so shortly.
I think that it can work only with G.711 codec, no chance with some other
low bandwidth like G.729 and/or G.723 or GSM. The protocol (H.323 or SIP) is
not so important as the used codec.

I need to have an electronic fax machine (not paper based) connected to an
extension of PBX, based on SIP.

I want to be able to only receive faxes through the PBX, from an analogue
line (X100P card) or an external IP call.

Thank you and I'll keep you in touch with my progress.

Best regards,
Dan

----- Original Message -----
From: "Simon Woodhead" <woodheads at gonegardening.com>
To: <asterisk-users at lists.digium.com>
Sent: Thursday, May 22, 2003 9:00 PM
Subject: Re: [Asterisk-Users] SIP UA Fax device


> Hi Dan,
>
> If you find one please let me know although we've had no success looking
for
> such a thing ourselves. Our experience to date in looking might be of some
> use to you though...
>
> We're trying to replace BRI lines with a H.323 connection to a telco over
> our leased line. Faxes remain one of the problem areas. Logic says that
> since faxes and modem were designed to send data over existing analogue
> voice channels that it should be possible to send them over VoIP channels
> but searching the archives for this list and elsewhere suggests otherwise.
> Apparently because the data is being modulated and then demodulated
> repeatedly through the various layers and VoIP is lossy it won't work. The
> solution seems to be T.38 fax relay although asterisk doesn't support it.
>
> We're playing with Hylafax (www.hylafax.org), an open source fax server.
You
> might get lucky asking around there for SIP support but to my knowledge it
> only supports hardware modems. For us, we're looking at setting up
asterisk
> extensions on a TDM-400P and then looping a physical wire into fax modems
on
> a neighbouring machine. We've tested this with * dialling out and
answering
> existing ISDN channels and forwarding to/from a normal fax machine and it
> works perfectly.
>
> IP wise, as I mentioned, we want to ditch the ISDN and use our H.323
> connection. We have two *s in different countries talking to each other by
> IAX. Despite what the archives say, we have been able to send faxes from
> analogue fax machines connected at each end (or dialling in/out to one
end)
> over a voice channel in between with no problems at all. We haven't tried
> over the H.323. yet but will be doing so shortly.
>
> I don't know which side of * you need the SIP connection but what works
over
> the net shouldn't struggle on a LAN. On the basis of our limited
experience
> so far, IP to outside seems to work fine and LANside you can either
> physically connect a fax modem to * or hook up something like an ATA186 to
a
> fax machine/fax-modem.
>
> I hope this is of some help and look forward to hearing how you get on.
>
> Cheers,
> Simon
>
> ----- Original Message -----
> From: "Dan" <dtoma at fx.ro>
> To: <asterisk-users at lists.digium.com>
> Sent: Thursday, May 22, 2003 9:10 AM
> Subject: [Asterisk-Users] SIP UA Fax device
>
>
> > Hi,
> >
> > Anyone knows a software fax device which can act as a SIP UA?
> > I want to have a SIP based FAX machine (sofware) on a PC associated with
> an
> > Asterisk extension.
> >
> > Thanks,
> > Dan
> >
> >
> > _______________________________________________
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> > Asterisk-Users at lists.digium.com
> > http://lists.digium.com/mailman/listinfo/asterisk-users
> >
>
>
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