t38modem / Discussion / Help: running with SIP?

Brian Postow - 2009-12-01

Has ANYONE actually gotten t38modem to work with SIP? I've tried several different combinations versions, and they either don't compile, or when run, they don't ever actually send out any IP Packets, or if they do, they get an error very early on…

There also doesn't seem to be any documentation on how to run it. Via some people on the hylafax list, my current command line is:

t38modem -tt -o t38modem.log -no-h323 -u T38modem -sip-listen udp\$127.0.0.1:6060 -sip-redundancy 3 -ptty /dev/ttypb -route "modem:2.*=sip:<dn>@192.168.90.95" -route "modem:0.*=sip:<dn>@127.0.0.1" -route "sip:.*=modem:<dn>"

But I'm not sure what all that means (and the -sip-redundancy arg seems to be ignored…). Some documentation so that I could see what these route lines actually mean, for example, would be very helpful.

thanks!

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Dima77 - 2009-12-01

>Has ANYONE actually gotten t38modem to work with SIP?

It is not a problem.
What version ptlib/opal/t38modem do you try with?

-sip-redundancy is a very old command and currently not used
To see help and possible commands, create help.txt file.
To do it, run command

t38modem.exe -h > help.txt

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Brian Postow - 2009-12-01

Currently, I'm running with
T38Modem Version 1.1.0
(OPAL-3.6.5, PTLIB-2.6.5) by Vyacheslav Frolov on Unix Darwin (10.2.0-i386)

After trying to make a call, I get:

2009/12/01 17:17:18.405 ptypb(e):2…0xb038d000 ModemEndPoint::GetMediaFormats
2009/12/01 17:17:18.407 ptypb(e):2…0xb038d000 SIP PDU Write failed: Input/output error
2009/12/01 17:17:18.407 ptypb(e):2…0xb038d000 SIP Could not write to sip:25554444@192.168.90.95 - Input/output error

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Tom J.P. Sun - 2009-12-31

Hi ,
Please try modify the "-ptty /dev/ttypb" option to "-ptty +/dev/ttypb" !

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Tom J.P. Sun - 2009-12-31

Also, I have encountered another problem . And found here is the only place to ask for help !

When using 2 minicoms opened with ttyT38-1, ttyT38-2 , when I dialed "atd0123" in minicom(/dev/ttyT38-1), there is "Ring" in another minicom(/dev/ttyT38-2) , but could not have the command "ata" get the "connected" reply, the first minicom failed after a few seconds with a "BUSY" result.

My environment is Debian Testing, libopal-3.6.6, libpt-2.6.5, t38modem-1.2.0

The compiling command for t38modem is : "USE_UNIX98_PTY=1 USE_OPAL=1 make opt"

The invoke command is :
./t38modem -tt -o /var/log/t38modem.log -no-h323 -u T38modem -sip-listen udp\$127.0.0.1:5060 -sip-redundancy 3 -ptty +/dev/ttyT38-1,+/dev/ttyT38-2,+/dev/ttyT38-3 -route "modem:.*=sip:<dn>@127.0.0.1" -route "sip:.*=modem:<dn>"

The suspect part in the log is (maybe in the following last 3 lines):
…
2009/12/31 10:00:51.749 ttyT38-1(e…0xb64fbb70 ModemEndPoint::OnMyCallback requ
est={
calltoken=modem:0123/ff5b425492/0
mode=fax
command=requestmode
response=confirm
modemtoken=ttyT38-1
}
2009/12/31 10:00:51.749 PThread1Arg:0xb612cb70 ModemConnection::GetMediaFormats
Call-EP<modem>
2009/12/31 10:00:51.749 PThread1Arg:0xb612cb70 ModemEndPoint::GetMediaFormats
2009/12/31 10:00:51.776 PThread1Arg:0xb612cb70 RTP     Changed RTP session form
at from 'rtp/avp' to 'udptl'
2009/12/31 10:00:51.776 PThread1Arg:0xb612cb70 ModemConnection::GetMediaFormats
Call-EP<modem>
2009/12/31 10:00:51.776 PThread1Arg:0xb612cb70 ModemEndPoint::GetMediaFormats
2009/12/31 10:00:51.781 PThread1Arg:0xb612cb70 ModemConnection::CreateMediaStre
am Call-EP<modem> mediaFormat=T.38 sessionID=1 isSource=1
2009/12/31 10:00:51.781 PThread1Arg:0xb612cb70 ModemConnection::CreateMediaStream Call-EP<modem> mediaFormat=T.38 sessionID=1 isSource=0
2009/12/31 10:00:51.781 PThread1Arg:0xb612cb70 ModemEngineBody::Attach t38engine stReqModeAckWait
2009/12/31 10:00:51.781 PThread1Arg:0xb612cb70 ttyT38-1 T38Engine::Attach
2009/12/31 10:00:51.781 PThread1Arg:0xb612cb70 ModemEngineBody::Attach t38engine Attached
2009/12/31 10:01:13.372 Housekeeper:0xb63b6b70 SIP     Response received for unknown handler ID: 0858ecf7-1df4-de11-9213-000ea6f84640@mobian
2009/12/31 10:01:13.373    OnRelease:0xb612cb70 ModemConnection::OnReleased Call-EP<modem>
2009/12/31 10:01:13.373    OnRelease:0xb612cb70 Call cleared
…
…
Any help is appreciated !

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Tom J.P. Sun - 2009-12-31

Hi:

By modifying the command in the previous post :

./t38modem -t -o /var/log/t38modem.log -no-h323 -u T38modem -sip-listen udp\$192.168.3.65:5060 -ptty +/dev/ttyT38-1,+/dev/ttyT38-2,+/dev/ttyT38-3 -route "modem:.*=sip:< dn >@192.168.3.65" -route "sip:.*=modem:< dn >"

by using the real IP address 192.168.3.65 of the same machine instead of 127.0.0.1, I got different log error :

2009/12/31 16:33:27.053 Pool:0xb62efb70 SIP Could not find media formats in SDP media description for session 1

any idea ?

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Vyacheslav Frolov - 2010-01-11

Try with OPAL from SVN trunk.

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il davo - 2010-01-11

My problem is that I don't know which is the problem :)
I used:
ptlib-2.6.5
opal-3.6.6
t38modem-1.2.0
Ubuntu Linux 8.04 LTS

I managed to build the binary without errors but when I do "./t38modem -help" I see the following error:

... Modem drivers: PTY Uses pseudo-tty (pty) devices to communicate with a fax application. For legacy ptys the tty should match to the regexp '^(/dev/)?tty[pqrstuvwxyzabcde][0123456789abcdef]$' assert.cxx(108) PWLib Assertion fail: Function pthread_mutex_destroy failed, file ptlib/unix/tlibthrd.cxx, line 1491, Error=2 Assertion fail: Function pthread_mutex_destroy failed, file ptlib/unix/tlibthrd.cxx, line 1491, Error=2 <A>bort, <C>ore dump?

I googled a bit around but I have no clue.
If I run it anyway with this syntax something works:

./t38modem -t -o /tmp/t38modem.log --no-h323 -p ttyx0,ttyx1 --route "modem:.*=sip:<dn>@192.168.1.213:5062" --route "sip:.*=modem:<dn>"

the calls in and out the modem seems to start but I can't hear the typical whistle…and I receive a "No Carrier Detect" on the fax machine.
I have the feeling that I'm near to solution but I'd like a little push on the right direction :)
Thanx in advance!
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il davo - 2010-01-12

Well…seems I managed to solve my problem.
I had to cleanup my test server from all my previous attempt and build ptlib, opal and t38modem from scratch.
But this time I used the latest stable sources from svn repository, ptlib V2_7 and opal V3_7 as described here:
http://www.opalvoip.org/wiki/index.php?n=Main.Subversion&Itemid=59
After that I followed the instructions on Opal Wiki:
http://www.opalvoip.org/pmwiki/pmwiki.php?n=Main.BuildingPTLibUnix#Install
http://www.opalvoip.org/pmwiki/pmwiki.php?n=Main.BuildingOpalUnix#Noinstall
And last I build the t38modem binary following the ReadMe.txt inside the source tgz.

With the new binary t38modem i'm able to send and receive fax using hylafax and a Gateway SN4638 Patton.
Sure I need further testing but now I'm optimist. Here the command used to run t38modem:

./t38modem -t -o /tmp/t38modem.log --no-h323 -p ttyx0,ttyx1 --route "modem:.*=sip:<dn>@192.168.0.254:5062" --route "sip:.*=modem:<dn>"

Where 192.168.0.254 is the Gateway listening on port 5062 instead of 5060, while t38modem is listening on the defaults port.
Hope this may help.
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Tom J.P. Sun - 2010-01-14

yes , by following vfrolov's suggestion, and the web page indicated by lokutus25 in the last reply, we can get svn thunk for :
ptlib 2.7.1
opal 3.7.1
t38modem 1.2.1

the compiling steps is :

# build pwlib cd ~/pwlib ./configure make sudo make install # build OPAL cd ~/opal ./configure make sudo make install sudo ldconfig # build T38modem cd ~/t38modem make USE_OPAL=1 opt sudo make USE_OPAL=1 install

remember to have the kernel support CONFIG_UNIX98_PTYS=y
the t38modem command I use is:

t38modem -tt -o /var/log/t38modem.log --no-h323 -p ttyx0,ttyx1 --route "modem:.*=sip:<dn>@192.168.3.65:5060" --route "sip:.*=modem:<dn>"

the 192.168.3.65 is real IP of the local machine.

the test result is:
1. open 2 minicoms, "atd0123" can "CONNECT" now. ( while the release version t38modem-1.2 cannot )
2. combined with hylafax is working now. ( send fax from one t38modem to the other is OK)
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Damir - 2010-01-14

I have a problem with modems:

I have following :

Modem ttyT38-0 (): Waiting for modem to come ready

Does anybody have a clue….

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Tom J.P. Sun - 2010-01-14

Please see this about "Configuring HylaFax to use T38modem"

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Damir - 2010-01-15

Where to find t38modem ver 1.2.1 or I can use 1.2.0

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il davo - 2010-01-15

Personally I wasn't able to download the last snapshot of t38modem with cvs due to an incorrect login.
I used the standard tarball of 1.2.0. and it worked. But if I can get the 1.2.1 I'll test also the last one :)

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Damir - 2010-01-15

Noe I have following error during t38modem install:

debian:~/t38modem-1.2.0# make USE_OPAL=1 opt
make DEBUG= default_target
make: Entering directory `/root/t38modem-1.2.0'
obj_linux_x86_opal/t38modem
./obj_linux_x86_opal/pmodeme.o: In function `Timeout::Timeout(PNotifier const&, bool)':
pmodeme.cxx:(.text._ZN7TimeoutC1ERK9PNotifierb+0x54): undefined reference to `PTimer::SetNotifier(PNotifier const&)'
./obj_linux_x86_opal/modemep.o:(.data.rel.ro._ZTV15ModemConnection+0x16c): undefined reference to `OpalConnection::TransmitInternalIM(OpalMediaFormat const&, RTP_DataFrame&)'
./obj_linux_x86_opal/modemep.o:(.data.rel.ro._ZTV15ModemConnection+0x170): undefined reference to `OpalConnection::OnReceiveInternalIM(OpalMediaFormat const&, RTP_DataFrame&)'
./obj_linux_x86_opal/modemep.o:(.data.rel.ro._ZTV15ModemConnection+0x174): undefined reference to `OpalConnection::TransmitExternalIM(OpalMediaFormat const&, RTP_DataFrame&)'
./obj_linux_x86_opal/modemep.o:(.data.rel.ro._ZTV15ModemConnection+0x178): undefined reference to `OpalConnection::OnReceiveExternalIM(OpalMediaFormat const&, RTP_DataFrame&)'
./obj_linux_x86_opal/modemep.o:(.data.rel.ro._ZTV21AudioModemMediaStream+0x40): undefined reference to `OpalMediaStream::SetCommandNotifier(PNotifier const&)'
./obj_linux_x86_opal/modemstrm.o:(.data.rel.ro._ZTV19T38ModemMediaStream+0x40): undefined reference to `OpalMediaStream::SetCommandNotifier(PNotifier const&)'
./obj_linux_x86_opal/h323ep.o:(.data.rel.ro._ZTV16MyH323Connection+0x4c): undefined reference to `H323Connection::IsConnectionOnHold()'
./obj_linux_x86_opal/h323ep.o:(.data.rel.ro._ZTV16MyH323Connection+0x16c): undefined reference to `OpalConnection::TransmitInternalIM(OpalMediaFormat const&, RTP_DataFrame&)'
./obj_linux_x86_opal/h323ep.o:(.data.rel.ro._ZTV16MyH323Connection+0x170): undefined reference to `OpalConnection::OnReceiveInternalIM(OpalMediaFormat const&, RTP_DataFrame&)'
./obj_linux_x86_opal/h323ep.o:(.data.rel.ro._ZTV16MyH323Connection+0x174): undefined reference to `OpalConnection::TransmitExternalIM(OpalMediaFormat const&, RTP_DataFrame&)'
./obj_linux_x86_opal/h323ep.o:(.data.rel.ro._ZTV16MyH323Connection+0x178): undefined reference to `OpalConnection::OnReceiveExternalIM(OpalMediaFormat const&, RTP_DataFrame&)'
./obj_linux_x86_opal/h323ep.o:(.data.rel.ro._ZTV14MyH323EndPoint+0xd0): undefined reference to `OpalRTPEndPoint::AdjustInterfaceTable(PIPSocket::Address&, PArray<PIPSocket::InterfaceEntry>&)'
./obj_linux_x86_opal/sipep.o: In function `MySIPEndPoint::Initialise(PConfigArgs const&)':
sipep.cxx:(.text+0xf25): undefined reference to `SIPRegister::Params::Params()'
./obj_linux_x86_opal/sipep.o:(.data.rel.ro._ZTV15MySIPConnection+0x4c): undefined reference to `SIPConnection::IsConnectionOnHold()'
./obj_linux_x86_opal/sipep.o:(.data.rel.ro._ZTV15MySIPConnection+0x16c): undefined reference to `OpalConnection::TransmitInternalIM(OpalMediaFormat const&, RTP_DataFrame&)'
./obj_linux_x86_opal/sipep.o:(.data.rel.ro._ZTV15MySIPConnection+0x170): undefined reference to `OpalConnection::OnReceiveInternalIM(OpalMediaFormat const&, RTP_DataFrame&)'
./obj_linux_x86_opal/sipep.o:(.data.rel.ro._ZTV15MySIPConnection+0x174): undefined reference to `SIPConnection::TransmitExternalIM(OpalMediaFormat const&, RTP_DataFrame&)'
./obj_linux_x86_opal/sipep.o:(.data.rel.ro._ZTV15MySIPConnection+0x178): undefined reference to `OpalConnection::OnReceiveExternalIM(OpalMediaFormat const&, RTP_DataFrame&)'
./obj_linux_x86_opal/sipep.o:(.data.rel.ro._ZTV15MySIPConnection+0x248): undefined reference to `SIPConnection::OnUseRTPSession(unsigned int, OpalMediaType const&, OpalTransportAddress const&, OpalTransportAddress&)'
./obj_linux_x86_opal/sipep.o:(.data.rel.ro._ZTV15MySIPConnection+0x250): undefined reference to `SIPConnection::OfferSDPMediaDescription(OpalMediaType const&, unsigned int, OpalRTPSessionManager&, SDPSessionDescription&)'
./obj_linux_x86_opal/sipep.o:(.data.rel.ro._ZTV13MySIPEndPoint+0xd0): undefined reference to `OpalRTPEndPoint::AdjustInterfaceTable(PIPSocket::Address&, PArray<PIPSocket::InterfaceEntry>&)'
collect2: ld returned 1 exit status
make: *** Error 1
make: Leaving directory `/root/t38modem-1.2.0'
make: *** Error 2

I downloaded opal and ptlib from SVN trunk this morning and installed them without problems. Does anybody have same experience or a clue about the problem?

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Tom J.P. Sun - 2010-01-18

http://t38modem.sourceforge.net/
I followed the instruction of this page, and could download / run t38modem successfully

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I just can tell that I was able to build the t38modem-1.2.0 after building ptlib and opal from svn.
Those are the environment vars used:

ptlib
export PTLIBPLUGINDIR=/usr/local/lib/ptlib-2.7
PKG_CONFIG_PATH=/usr/local/lib/pkgconfig

opal
export PTLIBPLUGINDIR=/usr/local/lib/ptlib-2.7:/usr/local/lib/opal-3.7
export LD_LIBRARY_PATH=/usr/local/lib
export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig

t38modem
export PTLIBDIR=/root/t38modem/ptlib-2.7
export OPALDIR=/root/t38modem/opal-3.7

If I use such environment I can build the t38modem-1.2.0 from cvs download with http://t38modem.sourceforge.net/ instructions. And also seems to works fine.
But I can't build the "latest" cvs t38modem in the same way. I managed to download the latest CVS release with:
cvs -d:pserver:anonymous@t38modem.cvs.sourceforge.net:/cvsroot/t38modem login
cvs -z3 -d:pserver:anonymous@t38modem.cvs.sourceforge.net:/cvsroot/t38modem co -P t38modem

When I run the usual: "make USE_OPAL=1 opt" I have the following errors:

# make USE_OPAL=1 opt
make DEBUG= default_target
make[1]: Entering directory `/home/manage/t38modem/t38modem-cvs-last'
g++ -I/home/manage/t38modem/ptlib-svn-2_7/include -DUSE_OPAL -DPTRACING=1 -D_REENTRANT    -fno-exceptions  -Wall  -DNDEBUG -Os  -DUSE_LEGACY_PTY -felide-constructors -Wreorder  -Os -Wall -Wextra -Wstrict-aliasing -Wfloat-equal -Wno-comment -Wno-unused -Winit-self -Wno-missing-field-initializers -fPIC -DPTRACING=1 -D_REENTRANT -fno-exceptions -I/usr/local/include    -I/home/manage/t38modem/opal-svn-3_7/include  -c opal/modemep.cxx -o obj_linux_x86_opal/modemep.o
opal/modemep.cxx: In member function ‘virtual void ModemConnection::RequestMode(PThread&, INT)’:
opal/modemep.cxx:745: error: no matching function for call to ‘OpalConnection::AdjustMediaFormats(bool, OpalMediaFormatList&, NULL)’
/home/manage/t38modem/opal-svn-3_7/include/opal/connection.h:878: note: candidates are: virtual void OpalConnection::AdjustMediaFormats(OpalMediaFormatList&) const
opal/modemep.cxx: In member function ‘bool ModemConnection::RequestMode(ModemConnection::PseudoModemMode)’:
opal/modemep.cxx:795: error: no matching function for call to ‘OpalConnection::AdjustMediaFormats(bool, OpalMediaFormatList&, NULL)’
/home/manage/t38modem/opal-svn-3_7/include/opal/connection.h:878: note: candidates are: virtual void OpalConnection::AdjustMediaFormats(OpalMediaFormatList&) const
opal/modemep.cxx: In member function ‘bool ModemConnection::SwitchToFaxPassthrough(OpalConnection&)’:
opal/modemep.cxx:832: error: no matching function for call to ‘OpalConnection::AdjustMediaFormats(bool, OpalMediaFormatList&, NULL)’
/home/manage/t38modem/opal-svn-3_7/include/opal/connection.h:878: note: candidates are: virtual void OpalConnection::AdjustMediaFormats(OpalMediaFormatList&) const
opal/modemep.cxx:873: error: no matching function for call to ‘ModemConnection::AdjustMediaFormats(bool, OpalMediaFormatList&, NULL)’
/home/manage/t38modem/opal-svn-3_7/include/opal/connection.h:878: note: candidates are: virtual void OpalConnection::AdjustMediaFormats(OpalMediaFormatList&) const
opal/modemep.cxx:874: error: no matching function for call to ‘OpalConnection::AdjustMediaFormats(bool, OpalMediaFormatList&, ModemConnection* const)’
/home/manage/t38modem/opal-svn-3_7/include/opal/connection.h:878: note: candidates are: virtual void OpalConnection::AdjustMediaFormats(OpalMediaFormatList&) const
opal/modemep.cxx:952: error: no matching function for call to ‘ModemConnection::AdjustMediaFormats(bool, OpalMediaFormatList&, NULL)’
/home/manage/t38modem/opal-svn-3_7/include/opal/connection.h:878: note: candidates are: virtual void OpalConnection::AdjustMediaFormats(OpalMediaFormatList&) const
opal/modemep.cxx:953: error: no matching function for call to ‘OpalConnection::AdjustMediaFormats(bool, OpalMediaFormatList&, ModemConnection* const)’
/home/manage/t38modem/opal-svn-3_7/include/opal/connection.h:878: note: candidates are: virtual void OpalConnection::AdjustMediaFormats(OpalMediaFormatList&) const
make[1]: *** [obj_linux_x86_opal/modemep.o] Error 1
make[1]: Leaving directory `/home/manage/t38modem/t38modem-cvs-last'
make: *** [opt] Error 2

I can't figure why yet.

Damir - 2010-01-20

Can you please write where from did you downloaded ptlib and opal ???

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il davo - 2010-01-20

I downloaded ptlib and opal from svn using the following instructions:
http://www.opalvoip.org/wiki/index.php?n=Main.Subversion

Browsing the SVN repository I saw which was the last versions for both.

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OK, here is the commands which I successfully make the t38modem from source:

svn co http://opalvoip.svn.sourceforge.net/svnroot/opalvoip/ptlib/trunk ptlib
svn co http://opalvoip.svn.sourceforge.net/svnroot/opalvoip/opal/trunk opal
cvs -z3 -d:pserver:anonymous@t38modem.cvs.sourceforge.net:/cvsroot/t38modem co -P t38modem
cd /root/ptlib
./configure
make; make install
cd /root/opal
./configure
make; make install
ldconfig
export OPALDIR=/root/opal
export PTLIBDIR=/root/ptlib
cd /root/t38modem
make USE_OPAL=1 clean [ don't know why, I failed in the initial compilation too, after clean, we can compile w/o problems]
make USE_OPAL=1

Vyacheslav Frolov - 2010-02-05

It's not possible to compile t38modem cvs trunk with Lalande release (PTLib v2.6 & OPAL v3.6).

The OpalVoip announced the stabilisation campaign of Sirius release (PTLib v2.8 & OPAL v3.8).
This is the last step on this becoming a standard stable release, superceding the Lalande release.
So if you have any errors with compiling, it's a goot time to report them to OpalVoip community right now.

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running with SIP?

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running with SIP? document.SUBSCRIPTION_OPTIONS = { "thing": "topic", "subscribed": false, "url": "subscribe", "icon": { "css": "fa fa-envelope-o" } };

running with SIP?