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[asterisk-users] Fax on FXS

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bilmar_gh at yahoo.com
Guest

Posted: Sat Jun 07, 2008 10:37 am Post subject: [asterisk-users] Fax on FXS

Hi List; What configuration needed to let my FXS send and receive FAX? Regards Bilal

matt at mattgwatson.ca
Guest

Posted: Sat Jun 07, 2008 12:00 pm Post subject: [asterisk-users] Fax on FXS

On June 7, 2008 11:37:20 am bilal ghayyad wrote:

Quote:

Hi List;

What configuration needed to let my FXS send and
receive FAX?

tzafrir.cohen at xorco...
Guest

Posted: Sat Jun 07, 2008 1:15 pm Post subject: [asterisk-users] Fax on FXS

On Sat, Jun 07, 2008 at 08:37:20AM -0700, bilal ghayyad wrote:

Quote:

Hi List;

What configuration needed to let my FXS send and
receive FAX?

Technically nothing. A fax behaves just like a normal phone device.

What you should be careful about is the path from the PSTN to that FXS
port.

--
Tzafrir Cohen
icq#16849755 jabber:tzafrir.cohen at xorcom.com
+972-50-7952406 mailto:tzafrir.cohen at xorcom.com
http://www.xorcom.com iax:guest at local.xorcom.com/tzafrir

jason.aarons at us.did...
Guest

Posted: Sat Jun 07, 2008 7:18 pm Post subject: [asterisk-users] Fax on FXS

While not on the FXS port itself other things to look for;

1) set the fax machine to disable Super G3 (33.3k), try to force it to
use G3 (14.4k).

2) set the fax machine to Disable ECM (Error Correction Mode)

3) If PSTN is T1 check span for errors, etc.

4) Some protocols have fax-passthrough and modem-relay

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Matt
Watson
Sent: Saturday, June 07, 2008 1:00 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] Fax on FXS

On June 7, 2008 11:37:20 am bilal ghayyad wrote:

Quote:

Hi List;

What configuration needed to let my FXS send and
receive FAX?

Your probably going to need to give some more details about your setup
before
anybody can help you... theres really nothing special you need to
configure
for an FXS port to attach a fax machine to it...

keep in mind that faxing over VoIP is extremely tricky at best, but if
your
entire call path is TDM then you shouldn;t have much of a problem.

--
Matt Watson
http://www.mattgwatson.ca

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eric at fnords.org
Guest

Posted: Mon Jun 09, 2008 12:34 pm Post subject: [asterisk-users] Fax on FXS

You should not expect FaxOverVoiceOverIPOverInternet to work well. If
you stick to ulaw codec for the entire call, it might work well enough
for your use, but it might not.

John Morey wrote:

Quote:

I've been thinking about something around these lines that I'd like feedback
on. What I'd like to d,o if it works, is have a fax machine in St. Louis
connected up to my asterisk box in Atlanta via Internet/SIP so that anytime
the fax machine in St Louis sends a fax it actually goes out through the
asterisk box in Atlanta. Something if I understand it correctly like :
Fax->SIP(long distance)->Asterisk->FXO->Customer Fax. Would something like
this work?

--
Consulting for Asterisk, Polycom, Sangoma, Digium, Cisco, LAN, WAN, QoS,
T-1, PRI, Frame Relay, Linux, and network design. Based near
Birmingham, AL. Now accepting clients worldwide.

stotaro at totarotechn...
Guest

Posted: Mon Jun 09, 2008 12:36 pm Post subject: [asterisk-users] Fax on FXS

On 6/9/08, John Morey <jbmorey at gmail.com> wrote:

Quote:

Hi List;

What configuration needed to let my FXS send and
receive FAX?

Regards
Bilal

Very doubtfully, unless you have a point to point with very low latency.

Thanks,
Steve Totaro

support at drdos.info
Guest

Posted: Mon Jun 09, 2008 12:44 pm Post subject: [asterisk-users] Fax on FXS

John Morey wrote:

Quote:

actually goes out through the asterisk box in Atlanta. Something if I
understand it correctly like : Fax->SIP(long
distance)->Asterisk->FXO->Customer Fax. Would something like this work?

Not reliably,

if you have a VPN connection to the remote site (We do with our remote
sites), I have HylaFAX+ running on each site. And, I submit remote fax
jobs and let the remote HylaFAX+ do the fax sending. It works quite
nicely.

All of our internal faxing are handled this way. Cuts down on the long
distance charges.

Doug
--

Ben Franklin quote:

"Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety."

matt at mattgwatson.ca
Guest

Posted: Mon Jun 09, 2008 5:46 pm Post subject: [asterisk-users] Fax on FXS

On June 9, 2008 12:57:11 pm John Morey wrote:

Quote:

I've been thinking about something around these lines that I'd like
feedback on. What I'd like to d,o if it works, is have a fax machine in
St. Louis connected up to my asterisk box in Atlanta via Internet/SIP so
that anytime the fax machine in St Louis sends a fax it actually goes out
through the asterisk box in Atlanta. Something if I understand it
correctly like : Fax->SIP(long distance)->Asterisk->FXO->Customer Fax.
Would something like this work?

This will not work:

Fax -> SIP ATA -> [internet] -> Asterisk -> FXO -> Fax

Because you don;t have end-to-end T.38 support, Asterisk supports T.38
pass-thru but not origination/termination (yet).

However, what *should* work is:

Fax -> SIP ATA -> [internet] -> Asterisk -> SIP ATA -> Fax

the SIP ATAs obviously have to have T.38 support - for example a Linksys
SPA2102 should do it for you. I've never tried faxing between ATA's so I
don;t know if they can actually negotiate T.38 support between each other,
but I don't really see a reason why they couldn't.
--
Matt Watson
http://www.mattgwatson.ca

support at drdos.info
Guest

Posted: Mon Jun 09, 2008 5:47 pm Post subject: [asterisk-users] Fax on FXS

John Morey wrote:

Quote:

Thanks all for the info. Yes I do have HylaFAX running and was
thinking about either the print-to-fax or email-to-fax route but for
some reason the remote site loves to write stuff on the faxes before
they send them. It's something, the writing on the fax, they are not
used to and I've been told I would have a hard time changing that.

The same here.

We have the fax machines in their own fax context, it grabs the fax from
the fax machine, converts it to pdf and then runs (Via the FaxDispatch
script) the handoff to the remote HylaFAX+ server.

Doug

--
Ben Franklin quote:

"Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety."

matt at mattgwatson.ca
Guest

Posted: Mon Jun 09, 2008 5:53 pm Post subject: [asterisk-users] Fax on FXS

On June 9, 2008 01:34:31 pm Eric "ManxPower" Wieling wrote:

Quote:

You should not expect FaxOverVoiceOverIPOverInternet to work well. If
you stick to ulaw codec for the entire call, it might work well enough
for your use, but it might not.

Just as an FYI - you have too many "Over"'s in your description....

FaxOverVoiceOverIP would make sense, but seeing as how "IP" is short
for "Internet Protocol", saying "Internet Protocol Over Internet" doesn;t
make much sense...

I would interpret that description as somebody trying to send a fax through a
VoIP system using a voice-codec like G.711

However, there is the T.38 protocol which is designed to solve this exact
problem, Asterisk support for it is just rather limited currently (pass-thru
only).

T.38 often gets referred to as FoIP (Fax over Ineternet Protocol)

--
Matt Watson
http://www.mattgwatson.ca

tzafrir.cohen at xorco...
Guest

Posted: Tue Jun 10, 2008 3:10 am Post subject: [asterisk-users] Fax on FXS

On Mon, Jun 09, 2008 at 06:53:34PM -0400, Matt Watson wrote:

Quote:

On June 9, 2008 01:34:31 pm Eric "ManxPower" Wieling wrote:

Quote:

You should not expect FaxOverVoiceOverIPOverInternet to work well. If
you stick to ulaw codec for the entire call, it might work well enough
for your use, but it might not.

Unless you use an openvpn / ipsec tunnel Smile

--
Tzafrir Cohen
icq#16849755 jabber:tzafrir.cohen at xorcom.com
+972-50-7952406 mailto:tzafrir.cohen at xorcom.com
http://www.xorcom.com iax:guest at local.xorcom.com/tzafrir

mwatson at becon.org
Guest

Posted: Tue Jun 10, 2008 8:08 am Post subject: [asterisk-users] Fax on FXS

Ah, you got me there! Could start throwing in a lot of "Over"'s going down that road Smile

--
Matt
http://www.mattgwatson.ca

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Tzafrir Cohen
Sent: Tuesday, June 10, 2008 4:10 AM
To: asterisk-users at lists.digium.com
Subject: Re: [asterisk-users] Fax on FXS

On Mon, Jun 09, 2008 at 06:53:34PM -0400, Matt Watson wrote:

Quote:

On June 9, 2008 01:34:31 pm Eric "ManxPower" Wieling wrote:

Quote:

You should not expect FaxOverVoiceOverIPOverInternet to work well. If
you stick to ulaw codec for the entire call, it might work well enough
for your use, but it might not.

Unless you use an openvpn / ipsec tunnel Smile

eric at fnords.org
Guest

Posted: Tue Jun 10, 2008 11:15 am Post subject: [asterisk-users] Fax on FXS

IP can be run over many things. Internet, Local LAN, Corporate WAN,
VPN, etc Each of these things have different characteristics and so I
add them to the list. FaxOverVoiceOverIPOverLAN is something that has a
good chance of working, as a LAN tends to have little latency and little
jitter, where FaxOverVoiceOverIPOverInternet has neither low latency nor
low jitter. How would suggest I indicate "global internet" instead of
"IP on a local lan"?

Matt Watson wrote:

Quote:

Ah, you got me there! Could start throwing in a lot of "Over"'s going down that road Smile

Quote:

On June 9, 2008 01:34:31 pm Eric "ManxPower" Wieling wrote:

Quote:

You should not expect FaxOverVoiceOverIPOverInternet to work well. If
you stick to ulaw codec for the entire call, it might work well enough
for your use, but it might not.

Unless you use an openvpn / ipsec tunnel Smile

--
Tzafrir Cohen
icq#16849755 jabber:tzafrir.cohen at xorcom.com
+972-50-7952406 mailto:tzafrir.cohen at xorcom.com
http://www.xorcom.com iax:guest at local.xorcom.com/tzafrir

_______________________________________________
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asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
http://lists.digium.com/mailman/listinfo/asterisk-users

_______________________________________________
-- Bandwidth and Colocation Provided by http://www.api-digital.com --

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
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--
Consulting for Asterisk, Polycom, Sangoma, Digium, Cisco, LAN, WAN, QoS,
T-1, PRI, Frame Relay, Linux, and network design. Based near
Birmingham, AL. Now accepting clients worldwide.

jra at baylink.com
Guest

Posted: Tue Jun 10, 2008 1:06 pm Post subject: [asterisk-users] Fax on FXS

On Tue, Jun 10, 2008 at 11:15:49AM -0500, Eric ManxPower Wieling wrote:

Quote:

Well, I think I'd write it as FAX/VoIP/Internet, but I agree entirely
with your semantics.

Cheers,
-- jra
--
Jay R. Ashworth Baylink jra at baylink.com
Designer The Things I Think RFC 2100
Ashworth & Associates http://baylink.pitas.com '87 e24
St Petersburg FL USA http://photo.imageinc.us +1 727 647 1274

Those who cast the vote decide nothing.
Those who count the vote decide everything.
-- (Joseph Stalin)

stotaro at totarotechn...
Guest

Posted: Tue Jun 10, 2008 1:35 pm Post subject: [asterisk-users] Fax on FXS

Find (voice) Replace (Analog) for starters.

Bottom line, without writing a book, is that fax and modem (analog)
converted to IP (and back) at some point will be altered. There are a
multitude of reasons that the audio is altered and to what degree is
going to determine your success or failure.

"FaxOverVoiceOverIPOverInternet has neither low latency nor low
jitter" is not a provable fact. I have very low latency or "jitter"
to many destinations. It depends how many hops and how much traffic.
A routetrace and ping can help you in those regards.

Thanks,
Steve Totaro
On Tue, Jun 10, 2008 at 12:15 PM, Eric ManxPower Wieling
<eric at fnords.org> wrote:

Quote:

Ah, you got me there! Could start throwing in a lot of "Over"'s going down that road Smile

Quote:

On June 9, 2008 01:34:31 pm Eric "ManxPower" Wieling wrote:

Quote:

You should not expect FaxOverVoiceOverIPOverInternet to work well. If
you stick to ulaw codec for the entire call, it might work well enough
for your use, but it might not.

Unless you use an openvpn / ipsec tunnel Smile

--
Consulting for Asterisk, Polycom, Sangoma, Digium, Cisco, LAN, WAN, QoS,
T-1, PRI, Frame Relay, Linux, and network design. Based near
Birmingham, AL. Now accepting clients worldwide.

_______________________________________________
-- Bandwidth and Colocation Provided by http://www.api-digital.com --

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
http://lists.digium.com/mailman/listinfo/asterisk-users

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