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joakimsen at gmail.com
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 Posted: Tue Jan 01, 2008 2:33 am Post subject: [asterisk-users] Asterisk 1.4 Fax |
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If by "fax box" you mean an ATA with a fax machine attached them
Asterisk 1.4 with T38 passthrough should work if the SIP provider has
T.38 capabilites.
If by "fax box" you mean a 'faxmail inbox' then no Asterisk cannot
help you terminate that from SIP. Get a Cisco gateway, make sure your
provider uses T.38 and connect that to your Asterisk via T1 or E1.
On Jan 1, 2008 12:50 AM, Al lists <asteriskal at gmail.com> wrote:
| Quote: | at this time is terminating a SIP trunk,
each DID will get its own fax box.
I guess at this time i'm looking to find a tutorial for installing iaxmodem
and hylafax as it seems to be the answer.
On Dec 31, 2007 9:11 PM, Andrew Joakimsen <joakimsen at gmail.com> wrote:
| Quote: |
On Dec 28, 2007 8:28 PM, Al lists <asteriskal at gmail.com> wrote:
| Quote: | what method is preferred:
haylafax and Iaxmodem or spnadsp for faxing.
|
What are you trying to do and do you have a T1 or ISDN line?
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steveu at coppice.org
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| Posted: Tue Jan 01, 2008 2:38 am Post subject: [asterisk-users] Asterisk 1.4 Fax |
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Rob Hillis wrote:
| Quote: | Last time I heard IAXModem didn't support T.38 because the IAX2
protocol didn't support T.38 - whether that's still the case or not, I
don't know.
|
There are actually two reasons. One is that T.38 over IAX is not
defined. The other is the current T.38 termination support in spandsp is
only for the full FAX machine it contains. T.38 termination to the class
1 FAX modem (T.31) interface for HylaFAX is a work in progress. When
that is done, I hope we will have a sipmodem to replace iaxmodem,
offering bother audio and T.38 to HylaFAX functionality.
Steve |
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steveu at coppice.org
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| Posted: Tue Jan 01, 2008 4:20 am Post subject: [asterisk-users] Asterisk 1.4 Fax |
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Hi Rob,
Rob Hillis wrote:
| Quote: | Well that answers that question. I see that t38modem provides an H232
modem - is this unsuitable for HylaFAX's purpose? (ignoring the fact
that it requires a kernel recompile on most newer distros.)
Steve Underwood wrote:
| Quote: | Rob Hillis wrote:
| Quote: | Last time I heard IAXModem didn't support T.38 because the IAX2
protocol didn't support T.38 - whether that's still the case or not, I
don't know.
|
There are actually two reasons. One is that T.38 over IAX is not
defined. The other is the current T.38 termination support in spandsp is
only for the full FAX machine it contains. T.38 termination to the class
1 FAX modem (T.31) interface for HylaFAX is a work in progress. When
that is done, I hope we will have a sipmodem to replace iaxmodem,
offering bother audio and T.38 to HylaFAX functionality.
Steve
|
|
The most recent versions of t38modem can apparently provide both a SIP
and H.323 T.38 to class 1 FAX modem interface for HylaFAX. What it
cannot provide is an audio FAX interface. The sipmodem code I am working
on will integrate audio and T.38 FAX processing in a single SIP entity.
Steve |
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asteriskal at gmail.com
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| Posted: Tue Jan 01, 2008 11:01 am Post subject: [asterisk-users] Asterisk 1.4 Fax |
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I'm not looking at T.38 , at this time its terminating a SIP trunk with
multiple DID's for fax.
I'm using this configuration with linksys PAP ATA and satisfied with
results.
I'm looking at removing these ATA 's and using Asterisk ( or giving it a try
) for terminating fax.
| Quote: | | Quote: | | Quote: |
| Quote: | Last time I heard IAXModem didn't support T.38 because the IAX2
protocol didn't support T.38 - whether that's still the case or not, I
don't know.
|
There are actually two reasons. One is that T.38 over IAX is not
defined. The other is the current T.38 termination support in spandsp
|
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is
| Quote: | | Quote: | only for the full FAX machine it contains. T.38 termination to the
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class
| Quote: | | Quote: | 1 FAX modem (T.31) interface for HylaFAX is a work in progress. When
that is done, I hope we will have a sipmodem to replace iaxmodem,
offering bother audio and T.38 to HylaFAX functionality.
Steve
|
|
The most recent versions of t38modem can apparently provide both a SIP
and H.323 T.38 to class 1 FAX modem interface for HylaFAX. What it
cannot provide is an audio FAX interface. The sipmodem code I am working
on will integrate audio and T.38 FAX processing in a single SIP entity.
Steve
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rob at hillis.dyndns.org
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| Posted: Tue Jan 01, 2008 1:51 pm Post subject: [asterisk-users] Asterisk 1.4 Fax |
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Then I suggest you prepare yourself for a lot of pain. Fax over the
'net without T.38 is almost guaranteed to not work.
Al lists wrote:
| Quote: | I'm not looking at T.38 , at this time its terminating a SIP trunk
with multiple DID's for fax.
I'm using this configuration with linksys PAP ATA and satisfied with
results.
I'm looking at removing these ATA 's and using Asterisk ( or giving it
a try ) for terminating fax.
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jonnt at taylortelepho...
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| Posted: Tue Jan 01, 2008 2:48 pm Post subject: [asterisk-users] Asterisk 1.4 Fax |
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REALY?????? Humm I have been doing this for over a year and we receive over 400 faxes a month! 8 iaxmodems with DID's from a real SIP provider. And this connection is used for ALL office traffic, mail, VPN, webmail, and DNS. NO echo and no voice quality issues. Now we do have a 12mb down 768k up connection.
Jonn
-----Original Message-----
From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Rob Hillis
Sent: Tuesday, January 01, 2008 12:51 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] Asterisk 1.4 Fax
Then I suggest you prepare yourself for a lot of pain. Fax over the
'net without T.38 is almost guaranteed to not work.
Al lists wrote:
| Quote: | I'm not looking at T.38 , at this time its terminating a SIP trunk
with multiple DID's for fax.
I'm using this configuration with linksys PAP ATA and satisfied with
results.
I'm looking at removing these ATA 's and using Asterisk ( or giving it
a try ) for terminating fax.
|
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support at drdos.info
Guest
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| Posted: Tue Jan 01, 2008 3:34 pm Post subject: [asterisk-users] Asterisk 1.4 Fax |
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Jonn R Taylor wrote:
| Quote: | REALY?????? Humm I have been doing this for over a year and we receive over 400 faxes a month! 8 iaxmodems with DID's from a real SIP provider. And this connection is used for ALL office traffic, mail, VPN, webmail, and DNS. NO echo and no voice quality issues. Now we do have a 12mb down 768k up connection.
|
How often are you checking your HylaFAX+ Logs?
Doug
--
Ben Franklin quote:
"Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety." |
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jonnt at taylortelepho...
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| Posted: Tue Jan 01, 2008 3:40 pm Post subject: [asterisk-users] Asterisk 1.4 Fax |
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I have it setup to email me any failed fax connections. Most of the faxes come from remote offices, distributors and customers.
Jonn
-----Original Message-----
From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Doug Lytle
Sent: Tuesday, January 01, 2008 2:35 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] Asterisk 1.4 Fax
Jonn R Taylor wrote:
| Quote: | REALY?????? Humm I have been doing this for over a year and we receive over 400 faxes a month! 8 iaxmodems with DID's from a real SIP provider. And this connection is used for ALL office traffic, mail, VPN, webmail, and DNS. NO echo and no voice quality issues. Now we do have a 12mb down 768k up connection.
|
How often are you checking your HylaFAX+ Logs?
Doug
--
Ben Franklin quote:
"Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety."
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support at drdos.info
Guest
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| Posted: Tue Jan 01, 2008 3:56 pm Post subject: [asterisk-users] Asterisk 1.4 Fax |
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Jonn R Taylor wrote:
| Quote: | I have it setup to email me any failed fax connections. Most of the faxes come from remote offices, distributors and customers.
|
Same here, but HylaFAX won't send you any logs of attempts that haven't
at least negotiated a fax transmission. Call comes in, tries to sync up
several times and then hangs up. It gets logged, but doesn't get sent
to the FaxMaster. You may want to check.
Doug
--
Ben Franklin quote:
"Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety." |
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gsalas at manta.telcon...
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| Posted: Tue Jan 01, 2008 4:05 pm Post subject: [asterisk-users] Asterisk 1.4 Fax |
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On Tue, 2008-01-01 at 13:48 -0600, Jonn R Taylor wrote:
| Quote: | REALY?????? Humm I have been doing this for over a year and we receive
over 400 faxes a month! 8 iaxmodems with DID's from a real SIP
provider. And this connection is used for ALL office traffic, mail,
VPN, webmail, and DNS. NO echo and no voice quality issues. Now we do
have a 12mb down 768k up connection.
|
Can you share more details about your implementation? what are you using
for faxing?
Regards,
--
Guillermo Salas M.
Telconet S.A.
Calle 15 y Avenida 24 Esq
Edificio Barre #2 Primer Piso
Telefono : +593 5 262 8071
Celular : +593 9 985 5138
e-mail : gsalas at manta.telconet.net
www : http://www.manta.telconet.net
http://www.telcocarrier.net
SIP : 666 at sip.manta.telconet.net
FWD : 558563
USA : 1 360 968 1701
Linux User: 255902
Beat me, whip me, make me use Windows!
Please avoid sending me Word or PowerPoint attachments.
See http://www.fsf.org/philosophy/no-word-attachments.html
Please avoid the Top Posting, see
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jonnt at taylortelepho...
Guest
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| Posted: Tue Jan 01, 2008 4:20 pm Post subject: [asterisk-users] Asterisk 1.4 Fax |
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If I had ANY failed faxes I would here about it. Iaxmodem creates a log of its own, so when I get a connection that fails hylafax sends the failure to me. One of the things that I found is you need to add nojitterbuffer to the iaxmodem config file, only use g711, and you must have QOS enabled on your switches and/or a traffic shaper on your internet connection.
I have a remote office that uses an IAX trunk and I can fax between these to offices over the internet. I have both app_txfax and app_rxfax also setup on asterisk and can use any of them. We also have 1 linksys ata that has a networked brother printer/fax and we can send faxes from it to any of the fax services on our network or any PSTN number.
Jonn
-----Original Message-----
From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Doug Lytle
Sent: Tuesday, January 01, 2008 2:56 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] Asterisk 1.4 Fax
Jonn R Taylor wrote:
| Quote: | I have it setup to email me any failed fax connections. Most of the faxes come from remote offices, distributors and customers.
|
Same here, but HylaFAX won't send you any logs of attempts that haven't
at least negotiated a fax transmission. Call comes in, tries to sync up
several times and then hangs up. It gets logged, but doesn't get sent
to the FaxMaster. You may want to check.
Doug
--
Ben Franklin quote:
"Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety."
_______________________________________________
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support at drdos.info
Guest
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| Posted: Tue Jan 01, 2008 4:41 pm Post subject: [asterisk-users] Asterisk 1.4 Fax |
|
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Jonn R Taylor wrote:
| Quote: | If I had ANY failed faxes I would here about it. Iaxmodem creates a log of its own, so when I get a connection that fails hylafax sends the failure to me. One of the things that I found is you need to add nojitterbuffer to the iaxmodem config file,
|
Really? I'll have to do some testing, I've never tried since I've read
you can't.
Doug
--
Ben Franklin quote:
"Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety." |
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faxguy at howardsilvan...
Guest
|
| Posted: Tue Jan 01, 2008 4:50 pm Post subject: [asterisk-users] Asterisk 1.4 Fax |
|
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Jonn R Taylor wrote:
| Quote: | One of the things that I found is you need to add nojitterbuffer to the iaxmodem config file
|
The reason that you need the nojitterbuffer in the iaxmodem config file
is because you're actually getting at least some jitter.
IAXmodem's jitterbuffer simply fills-in gaps due to jitter with
previously-heard audio samples. There is no way to recreate the missing
audio. Filling-in the gaps with previous audio samples is effective in
preventing premature carrier loss conditions, but it messes up the
modems until real carrier loss does occur. It turns out that in most
cases it's better to simply skip over the missing audio. The DSP seems
to handle that quite gracefully.
Thanks,
Lee. |
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jonnt at taylortelepho...
Guest
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| Posted: Tue Jan 01, 2008 4:50 pm Post subject: [asterisk-users] Asterisk 1.4 Fax |
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I have always said that if some one said it can't be done, they did not try hard enough.
FYI... I love this.
Ben Franklin quote:
"Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety."
Jonn
-----Original Message-----
From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Doug Lytle
Sent: Tuesday, January 01, 2008 3:42 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] Asterisk 1.4 Fax
Jonn R Taylor wrote:
| Quote: | If I had ANY failed faxes I would here about it. Iaxmodem creates a log of its own, so when I get a connection that fails hylafax sends the failure to me. One of the things that I found is you need to add nojitterbuffer to the iaxmodem config file,
|
Really? I'll have to do some testing, I've never tried since I've read
you can't.
Doug
--
Ben Franklin quote:
"Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety."
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jonnt at taylortelepho...
Guest
|
| Posted: Tue Jan 01, 2008 5:02 pm Post subject: [asterisk-users] Asterisk 1.4 Fax |
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That is correct. I found that out awhile ago with our internal fax. It would not connect, but the external faxes coming in over SIP worked.
Jonn
-----Original Message-----
From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Lee Howard
Sent: Tuesday, January 01, 2008 3:50 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] Asterisk 1.4 Fax
Jonn R Taylor wrote:
| Quote: | One of the things that I found is you need to add nojitterbuffer to the iaxmodem config file
|
The reason that you need the nojitterbuffer in the iaxmodem config file
is because you're actually getting at least some jitter.
IAXmodem's jitterbuffer simply fills-in gaps due to jitter with
previously-heard audio samples. There is no way to recreate the missing
audio. Filling-in the gaps with previous audio samples is effective in
preventing premature carrier loss conditions, but it messes up the
modems until real carrier loss does occur. It turns out that in most
cases it's better to simply skip over the missing audio. The DSP seems
to handle that quite gracefully.
Thanks,
Lee.
_______________________________________________
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