VoIP Mailing List Archives
Mailing list archives for the VoIP community |
|
| View previous topic :: View next topic |
| Author |
Message |
joakimsen at gmail.com
Guest
|
 Posted: Mon May 19, 2008 10:49 pm Post subject: [asterisk-users] Fax Machine Options |
 |
|
Cisco gateway with T.38 support. That's the only real way to do faxing
through asterisk. I think a VG200 with newer firmware will support SIP
+ T.38 but don't buy on my suggestion because I've never used that
device outside call manager configuration.
Or see if your VoIP provider supports T.38 fax but you must use SIP in
that case. It will work very well once you get it working.... hint:
check udptl.conf
On Mon, May 19, 2008 at 11:27 PM, Joseph L. Casale
<JCasale at activenetwerx.com> wrote:
| Quote: | Is my only solution to add a fax machine to our VOIP only setup by using an
IAXy?
I should specify the office people want a traditional fax machine in the
sense that
fax's be sent and received from a physical unit, they don't want an email to
fax setup.
They have a dedicated sip did provisioned just for the fax.
What are others using?
Thanks!
jlc
_______________________________________________
-- 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
|
|
|
| Back to top |
|
 |
faxguy at howardsilvan...
Guest
|
| Posted: Mon May 19, 2008 11:23 pm Post subject: [asterisk-users] Fax Machine Options |
|
|
Andreas van dem Helge wrote:
| Quote: | Cisco gateway with T.38 support. That's the only real way to do faxing
through asterisk.
|
Although this statement has marginally more truth to it given the
SIP-only context that the original poster provided, it is still
substantially inaccurate.
There are several ways to do T.38 other than with a Cisco gateway. Now,
if you meant that T.38 is the only way in the SIP-only context (and not
specifically Cisco-branded T.3 then that has significantly more
accuracy to it.
However, if by *real* you also mean *reliable* then be aware that T.38
over SIP/UDP has an inherent weakness due to the medium that make it, in
my experience, significantly less-reliable than simply having a fax
machine hooked up to a traditional analog line.
When my clients come to me with the same issue I generally do not push
them into a corner with T.38. In almost all cases they find that it is
worth the $20-50 monthly for the analog fax line... and if that expense
is too much then the on-line fax service provider is an easy recommendation.
Note that if you have a fax machine that performs some variant of T.37
(fax-over-email) and you have an on-line service provider that is
willing to work with you... then you can rather easily get your fax
machine faxing through their service. (Which is yet another option.)
Thanks,
Lee. |
|
| Back to top |
|
|
joakimsen at gmail.com
Guest
|
| Posted: Tue May 20, 2008 1:02 am Post subject: [asterisk-users] Fax Machine Options |
|
|
On Tue, May 20, 2008 at 12:23 AM, Lee Howard <faxguy at howardsilvan.com> wrote:
| Quote: | Andreas van dem Helge wrote:
| Quote: | Cisco gateway with T.38 support. That's the only real way to do faxing
through asterisk.
|
Although this statement has marginally more truth to it given the
SIP-only context that the original poster provided, it is still
substantially inaccurate.
|
So, mr accurate, please tell us what is the best way to fax via
Asterisk. Keep in mind you can't always control the latency between
the endpoint and the asterisk machine/media gateway (yes, I know SIP
to asterisk on the same VLAN + send the call via PRI works pretty
well).
And how do we know he is using SIP only? He asked about the IAXy!
| Quote: | There are several ways to do T.38 other than with a Cisco gateway. Now,
if you meant that T.38 is the only way in the SIP-only context (and not
specifically Cisco-branded T.3 then that has significantly more
accuracy to it.
|
Doesn't have to be Cisco. But there is no Asterisk T38Gateway.... so
either way you need to buy a 3rd party gateway (or use a service that
supports it... check out www.gafachi.com) Audiocodes we can take off
the list because the violate the GPL so next down my list is Cisco.
But any SIP-compliant T.38 gateway will work.
| Quote: | However, if by *real* you also mean *reliable* then be aware that T.38
over SIP/UDP has an inherent weakness due to the medium that make it, in
my experience, significantly less-reliable than simply having a fax
machine hooked up to a traditional analog line.
|
Yes but significantly the most reliable way to fax at the moment via
"VoiP"... well you have that magic answer but I haven't heard it yet.
Honestly if the OP is using the phones voip-only and can make calls
and understand the remote party and be understood there should be no
issues. The problem is even in an environment where voice quality is
perceived very well faxing could still be an issue. If you have an
issue where your t38 calls can't complete due to packet loss, latency
or other such issues I doubt you can make an intelligible phone call.
| Quote: | When my clients come to me with the same issue I generally do not push
them into a corner with T.38. In almost all cases they find that it is
worth the $20-50 monthly for the analog fax line... and if that expense
is too much then the on-line fax service provider is an easy recommendation.
|
You're not my client and I'm not trying to pressure anyone. What if
they have 500 fax machine spit over 23 locations is keeping phone
lines still cost effective? He's asking on the Asterisk mailing list
regarding faxes so I assume 'get a phone line' isn't an option.
| Quote: | Note that if you have a fax machine that performs some variant of T.37
(fax-over-email) and you have an on-line service provider that is
willing to work with you... then you can rather easily get your fax
machine faxing through their service. (Which is yet another option.)
|
And how many (low cost... not $5000 "copiers") do that?
and to the OP about the hardware, even a cheap grandsteam ATA will
work just fine... that's what I use on my personal fax machine and it
has no issues. I can't recall a time this year a fax has failed. This
is going over the public internet and then also back out to a voip
provider. We do use decent networks but that's about it. No QoS
anywhere down the line. |
|
| Back to top |
|
|
JCasale at activenetwe...
Guest
|
| Posted: Tue May 20, 2008 1:37 am Post subject: [asterisk-users] Fax Machine Options |
|
|
| Quote: | and to the OP about the hardware, even a cheap grandsteam ATA will
work just fine... that's what I use on my personal fax machine and it
has no issues. I can't recall a time this year a fax has failed. This
is going over the public internet and then also back out to a voip
provider. We do use decent networks but that's about it. No QoS
anywhere down the line.
|
Hey guys,
Cart got before the horse here:) Company already has SIP lines ordered and
stationary being printed :/ I need to make a fax machine work now, heh. I
thought about the IAXy only because I understood it could take an analogue
phone and interface it with Asterisk without the need for an expensive peripheral
card. I presume the grandsteam ATA accomplishes the same but uses SIP? Which one do you use
that you can say works?
What does the SIP-compliant T.38 gateway do differently over a cheap ATA?
While we are on this, can you suggest a Multifunction you have used that works?
Thanks a lot guys!
jlc |
|
| Back to top |
|
|
benny+usenet at amorse...
Guest
|
| Posted: Tue May 20, 2008 5:38 am Post subject: [asterisk-users] Fax Machine Options |
|
|
Lee Howard <faxguy at howardsilvan.com> writes:
| Quote: | Note that if you have a fax machine that performs some variant of T.37
(fax-over-email) and you have an on-line service provider that is
willing to work with you... then you can rather easily get your fax
machine faxing through their service. (Which is yet another option.)
|
Tell me of a fax machine which can be programmed to do T.37 while
keeping the same UI as regular faxes, and we'll buy a hundred.
All the ones I've seen require you to type in email addresses instead
of phone numbers, or use a separate keyboard instead of the usual
numeric one. That is not acceptable for regular users.
I just want the machine to add @fax.ipvision.dk (example, this doesn't
currently work from the Internet) to the phone number and send off the
email. Authentication would be nice, but I could even live without
that.
/Benny |
|
| Back to top |
|
|
oza-4h07 at myamail.com
Guest
|
| Posted: Tue May 20, 2008 6:49 am Post subject: [asterisk-users] Fax Machine Options |
|
|
2008/5/20 Benny Amorsen <benny+usenet at amorsen.dk <benny%2Busenet at amorsen.dk>
| Quote: | Lee Howard <faxguy at howardsilvan.com> writes:
| Quote: | Note that if you have a fax machine that performs some variant of T.37
(fax-over-email) and you have an on-line service provider that is
willing to work with you... then you can rather easily get your fax
machine faxing through their service. (Which is yet another option.)
|
Tell me of a fax machine which can be programmed to do T.37 while
keeping the same UI as regular faxes, and we'll buy a hundred.
All the ones I've seen require you to type in email addresses instead
of phone numbers, or use a separate keyboard instead of the usual
numeric one. That is not acceptable for regular users.
I just want the machine to add @fax.ipvision.dk (example, this doesn't
currently work from the Internet)
|
That's VERY true :
I'm still looking for an MFP accepting numbers (ex: 012345678) as default
when a user is typing an email address.
Unfortunately, all of them would ask you to press 4 times key labelled 2
(which is also used for A, B and C) when in email mode though it would
default to numbers when in fax mode.
to the phone number and send off the
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20080520/4714dccc/attachment.htm |
|
| Back to top |
|
|
steveu at coppice.org
Guest
|
| Posted: Tue May 20, 2008 8:42 am Post subject: [asterisk-users] Fax Machine Options |
|
|
Matt Watson wrote:
| Quote: | I believe Asterisk 1.6 with app_fax supports T.38 origination and termination, that is not gatewaying, however if origination and termination are already there, gatewaying should be fairly trivial to implement. I haven't actually tested 1.6 using T.38, however I have read: http://www.asterisk.org/node/48457
|
T.38 gateway is a totally different problem than T.38
origination/termination. They share very little code, and almost none of
their design.
Regards,
Steve |
|
| Back to top |
|
|
JCasale at activenetwe...
Guest
|
| Posted: Tue May 20, 2008 8:55 am Post subject: [asterisk-users] Fax Machine Options |
|
|
| Quote: | T.38 gateway is a totally different problem than T.38
origination/termination. They share very little code, and almost none of
their design.
Regards,
Steve
|
Well,
It turns out their SIP provider doesn't support the T.38 protocol for faxing.
Their statement is if you really need it, use ulaw and AstraFax? I don't understand
how AstraFax makes a difference in the process?
Thanks!
jlc |
|
| Back to top |
|
|
faxguy at howardsilvan...
Guest
|
| Posted: Tue May 20, 2008 9:34 am Post subject: [asterisk-users] Fax Machine Options |
|
|
Joseph L. Casale wrote:
| Quote: | It turns out their SIP provider doesn't support the T.38 protocol for faxing.
Their statement is if you really need it, use ulaw and AstraFax? I don't understand
how AstraFax makes a difference in the process?
|
It doesn't make a difference. uLaw over SIP/UDP still involves jitter
which results in data loss ... regardless of what fax device or program
you use.
As I tried to indicate in my first reply... I would encourage you to
order an analog phone line for that fax machine. There are other
options, but in most cases the customer is happy to pay the line charge.
Thanks,
Lee. |
|
| Back to top |
|
|
faxguy at howardsilvan...
Guest
|
| Posted: Tue May 20, 2008 10:31 am Post subject: [asterisk-users] Fax Machine Options |
|
|
Benny Amorsen wrote:
| Quote: | Lee Howard <faxguy at howardsilvan.com> writes:
| Quote: | Note that if you have a fax machine that performs some variant of T.37
(fax-over-email) and you have an on-line service provider that is
willing to work with you... then you can rather easily get your fax
machine faxing through their service. (Which is yet another option.)
|
Tell me of a fax machine which can be programmed to do T.37 while
keeping the same UI as regular faxes, and we'll buy a hundred.
All the ones I've seen require you to type in email addresses instead
of phone numbers, or use a separate keyboard instead of the usual
numeric one. That is not acceptable for regular users.
|
Unfortunately, I'm not well-versed on all fax machine UI's out there. I
know that several of them perform scan-to-email or T.37 variants of some
kind... Panasonic was one of them. However, whether or not it was a
seamless and transparent switch to T.37 from analog I am not sure...
because I never really used them.
In the case that I needed T.37 I just built my own "fax machine".
Realize that you, too, can build your own fax machine with a scanner, a
PC, and a modem. And if you are just doing T.37 you can omit the modem
part.
I used SANE utilities with some PHP to make a simple UI that ran on the
small PC.
Thanks,
Lee. |
|
| Back to top |
|
|
eric at fnords.org
Guest
|
| Posted: Tue May 20, 2008 10:49 am Post subject: [asterisk-users] Fax Machine Options |
|
|
Lee Howard wrote:
| Quote: | As I tried to indicate in my first reply... I would encourage you to
order an analog phone line for that fax machine. There are other
options, but in most cases the customer is happy to pay the line charge.
|
When you go the analog POTS line route it just works. No messing with
gains, no issues with jitter, no compression. It Just Works and I can
get on with interesting stuff instead of wasting time trying to get fax
to work over voice over IP over internet. |
|
| Back to top |
|
|
mwatson at becon.org
Guest
|
| Posted: Tue May 20, 2008 12:44 pm Post subject: [asterisk-users] Fax Machine Options |
|
|
Interesting... I really don;t know the T.38 protocol other than what it does. How it goes about doing it I haven;t really gotten into.
I would of thought that gatewaying would of (essentially) be a bridge between a termination and origination action. However that is just completely sort of "what i think" without any real evidence behind my thoughts.
One day i'll have to read up on it.
--
Matt
________________________________________
From: asterisk-users-bounces at lists.digium.com [asterisk-users-bounces at lists.digium.com] On Behalf Of Steve Underwood [steveu at coppice.org]
Sent: Tuesday, May 20, 2008 9:42 AM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] Fax Machine Options
Matt Watson wrote:
| Quote: | I believe Asterisk 1.6 with app_fax supports T.38 origination and termination, that is not gatewaying, however if origination and termination are already there, gatewaying should be fairly trivial to implement. I haven't actually tested 1.6 using T.38, however I have read: http://www.asterisk.org/node/48457
|
T.38 gateway is a totally different problem than T.38
origination/termination. They share very little code, and almost none of
their design.
Regards,
Steve
_______________________________________________
-- 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 |
|
| Back to top |
|
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Search
