[Asterisk-Users] Fax->Email for Hosted PBX

[Tom Hayden]

I would agree wholeheartedly with everything Colin just said. I've had
extensive experience with SpanDSP and with routing thru to an ATA.
Both are touchy and work OK, but not well enough to make the users
stop calling me :) Currently, we use SpanDSP and it works OK -
although sometimes pages get mangled.

I would *highly* recommend just getting a couple traditional POTS
lines for faxes - it's still the most reliable way to go and what
users are familiar with. You could hook a hylafax box up to those
lines and still use a fax->email gateway.

--
Tom Hayden


On 9/15/05, Colin Anderson <ColinA at landmarkmasterbuilder.com> wrote:
> We use SpanDSP to recieve faxes on our PRI, a couple hundred a day with a
> failure rate of ~5% which is pretty good I think but enough to tick people
> off. Always the same fax numbers fail. What I did is have an exception list
> context that is run just before RxFax. If the caller ID matches a "bad"
> machine, the call is rerouted to a regular fax not off of a TDM or ATA but
> forwarded to a POTS line (actually another channel on the same PRI - love
> that Adtran!)
> 
> In my tests, routing thru VoIP or out thru a TDM or ATA just plain doesn't
> work, or doesn't work enough for it to be usable. You wold serve your
> customer best by having Asterisk with SpanDSP at the telco demarc rx the fax
> directly, and avoid shunting the call to an ATA or TDM.
> 
> 
> -----Original Message-----
> From: Alexander Lopez [mailto:alex.lopez at opsys.com]
> Sent: Thursday, September 15, 2005 9:43 AM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: RE: [Asterisk-Users] Fax->Email for Hosted PBX
> 
> 
> Best scenario does not route faxes over the IP network as a VoIP call.
> 
> You can either use spandsp as a fax on the Asterisk box, (has problems,
> but the delveloper is behind solving them)
> 
> You can route the calls to a fax server located in the same colo via
> tdm. (you can use HylaFax on Linix of any other solution.
> 
> I have used Fax over VoIP for about 2-3 years. Some machines can't
> handle it. Others can.  Receiving has a higher success rate than
> sending....
> 
> 
> 
> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com
> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Michael
> Welter
> Sent: Thursday, September 15, 2005 11:09 AM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: [Asterisk-Users] Fax->Email for Hosted PBX
> 
> I'm proposing to install an Asterisk PBX at a collocation facility for a
> 
> remote customer.  Each of the customer locations will have an SPA-3000
> with the FXO port connecting a POTS circuit and the FXS port connecting
> a fax machine or red phone.
> 
> In addition to voice traffic, the customer has a high volume of incoming
> 
> and outgoing faxes.
> 
> Would it be possible, using g711 between the SPA-3000 and server, to
> have spandsp/rxfax receive a fax from the POTS circuit via the SPA-3000?
> 
>   From the locally attached fax machine?  (I realize that packet loss
> will have a adverse effect on fax transmissions.)
> 
> Would I be better-off attaching the fax machines to a Mediatrix 2102?
> 
> Any help is appreciated.
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-- 
Tom