Hi Miroslav,
It sounds like you don't really understand what T.38 is. You need some
form of modem to get from a normal FAX machine to a T.38 channel.
spandsp can do that. A normal FAX modem can do that. You need a modem
somewhere, though. That is why developing the FAX modems was the first
Hi ,
I tried this a lot, but with no sucess , even in a local network , there
is always some loss and you receive only chunks of the original file .
Pedro.
Miroslav Nachev wrote:
Hi,
We try to send Fax through IP Network but without success. The
other party use NetCentrex SoftSwitch and our
-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Pedro Howat
Rodrigues
Sent: 19 October 2004 15:53
To: Miroslav Nachev; Asterisk Users Mailing List - Non-Commercial
Discussion
Subject: Re: [Asterisk-Users] Fax over IP doesn't works
Hi ,
I tried this a lot, but with no sucess
Just my $0.02 but seems to me the VoIP community as a whole needs to extend
SIP (or IAX?) with a special 'fax data' mode wherein the gateways either
act locally as the modem and queue/push bits (not audio data) for the
remote end or transparently bridge them through in the case of a
Yiannis Costopoulos wrote:
Well,
assuming that some of these CODECS do error correction and drop any
information that hasn't come through instead of doing error detection and
request to re-transmit the lost information, is somewhat expected. Are there
any Fax over IP protocols?
Yes. T.38. *
Michael Loftis wrote:
Just my $0.02 but seems to me the VoIP community as a whole needs to
extend SIP (or IAX?) with a special 'fax data' mode wherein the
gateways either act locally as the modem and queue/push bits (not
audio data) for the remote end or transparently bridge them through in
Someone should put a bounty on T38. We're using spandsp right now and
have had success - but it was an absolute pain to get it to work.
On Oct 19, 2004, at 12:38 PM, Steve Underwood wrote:
Michael Loftis wrote:
Just my $0.02 but seems to me the VoIP community as a whole needs to
extend SIP (or
So what changes with T.38? You still need spandsp to interwork with the
PSTN. What was so hard about getting spandsp to work? (I'm genuinely
interested)
Regards,
Steve
Darren Sessions wrote:
Someone should put a bounty on T38. We're using spandsp right now and
have had success - but it was an
We used spandsp on the voip side. Our inbound vendor sets the call up
G711 and spandsp answers. It's a bit slow as it seems to only negotiate
v29 terbo, but it works.
Finding the correct version of libtiff was a pain. One sub version off,
and it wouldn't work. Wasn't so much that it was a hard
Darren Sessions wrote:
We used spandsp on the voip side. Our inbound vendor sets the call up
G711 and spandsp answers. It's a bit slow as it seems to only
negotiate v29 terbo, but it works.
Finding the correct version of libtiff was a pain. One sub version
off, and it wouldn't work. Wasn't so
Miroslav Nachev wrote:
Hello Steve,
There is another way to send fax if you use Fax Machine on some FXS
port.
and exactly how does that get the FAX into the T.38 channel? :-\
Steve
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Miroslav Nachev wrote:
Hello Steve,
In the project OpenH323 the T.38 is supported. The easyest way is to
correct Asterisk logic with OpenH323.
Maybe, but from a quick look last year it didn't appear easy to make
their version of T.38 play nicely with *. I've been working on the basis
that I
Steve Underwood wrote:
So what changes with T.38? You still need spandsp to interwork with the
PSTN. What was so hard about getting spandsp to work? (I'm genuinely
interested)
I switched to spandsp rather that purchase an expensive multi-port
FaxModem card for a fax server.
I've had absolutely
On Tue, 2004-10-19 at 11:59 -0600, Michael Welter wrote:
I've had absolutely no problems with spandsp. I've got rxfax to email
working now
Any chance of a clue as to how you did it?
I've had some success utilities from Hylafax, it works perfectly on one
machine but fails on my actual * box.
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