[asterisk-users] Asterisk and Faxing

[Miguel Molina]

Barry Fawthrop escribió:
> Barry Fawthrop wrote:
>   
>> Hi All
>>
>> I have been looking around and haven not been able to find a working example
>> I have a fresh/new  install of Asterisk 1.6.2.0  with dahdi 2.2.1 and libpri 1.4.10.2
>>
>> I use a sangoma A200 card so I am using wanpipe 3.4.7
>> If I use zaptel which I read I need for app_rxfax then asterisk crashes with segfaults on startup
>>
>> asterisk[2624]: segfault at 30353466 ip b7eb538b sp bffda26c error 4 in libc-2.7.so[b7e3f000+155000]
>> asterisk[2647]: segfault at 30353466 ip b7e6338b sp bfb7708c error 4 in libc-2.7.so[b7ded000+155000]
>> asterisk[2666]: segfault at 30353466 ip b7dfe38b sp bfa6e4ec error 4 in libc-2.7.so[b7ded000+155000]
>>
>> When I use dahdi at least asterisk will start but app_rxfax will fail
>> with  unknown symbol in ast_register_application
>>
>> I could only find a precompiled-linux-spandsp-app-fax   is there anyway to get the source
>> and compile for myself?  Where I can compile for dahdi and not zaptel.
>> Or can someone explain why the segfaulting??
>>
>>
>> my machine O/S is:  Debian   kernel : 2.6.26-2-686   i686
>>
>> My goal is to connect a fax machine to the the sangoma card so I can send
>> paper based faxes.
>>
>> I have a teliax provided SIP phone number which will be the fax number to receive all faxes
>> and have them emailed to a central email address, hopefully in PDF format. where they can
>> be printed and/or forwarded.
>>
>> It would be nice to have the incoming fax emailed to a specific address based on either
>> subject or senders phone number. If this is possible I would like to know how.
>>
>>
>> Thanks in advance
>>
>> Barry
>>
>>     
>
> Looking at SIP debug of an incoming fax call I see
>
> v=0
> o=root 2007366114 2007366115 IN IP4 24.xx.xx.xx
> s=Asterisk PBX 1.6.2.0
> c=IN IP4 24.xx.xx.xx
> t=0 0
> m=image 4308 udptl t38
> a=T38FaxVersion:0
> a=T38MaxBitRate:9600
> a=T38FaxFillBitRemoval
> a=T38FaxTranscodingMMR
> a=T38FaxTranscodingJBIG
> a=T38FaxRateManagement:transferredTCF
> a=T38FaxMaxDatagram:1400
> a=T38FaxUdpEC:t38UDPFEC
>
>
> Yes my udptl.conf file has
>
>
> udptlstart = 4000
> udptlend = 4999
> T38FaxUdpEC = t38UDPRedundancy
> T38FaxMaxDatagram = 400
> VoipFaxMaxRate = 5
> T38MaxBitRate = 14400
> ;udptlchecksums=no
> udptlfecentries = 3
> udptlfecspan = 3
> use_even_ports = yes     ;;   tried both  no and yes
>
>
> It would appear from the BitRate and UdpEC that my udptl.conf file is not being used?
> Or am I missing something?
>
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Please correct me if I'm wrong, but AFAIK spandsp based fax applications 
for asterisk only support a maximum of 9600bps.

Cheers and Merry Christmas,

-- 
Ing. Miguel Molina
Grupo de Tecnología
Millenium Phone Center

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