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Hi list,
I'm having difficulties when receiving faxes from the PSTN with this
relatively simple installation:
PSTN <--PRI--> GW <--T.38--> Asterisk
The gateway is a Mediatrix 3301 (firmware Dgw 2.0.14.251). It's
configured to transmit faxes as T.38. I may have missed something in its
configuration, but it does switch to T.38 when a fax is detected. On the
Asterisk side, I'm using 10.2.1 with spandsp-0.0.6-pre20 and ReceiveFax
from res_fax_spandsp. ${FAXSTATUS} returns FAILED and ${FAXERROR}
"Disconnected after permitted retries".
I did a network capture, attached to this mail: from my understanding,
T.38 is accepted by Asterisk, then there seems to be some UDPTL traffic,
which I don't understand...
Why does it fail, and what is wrong? I'd appreciate if someone could
send me advice / suggestions.
Thanks,
- - --
Jean-Denis Girard
SysNux Syst?mes Linux en Polyn?sie fran?aise
http://www.sysnux.pf/ T?l: +689 50 10 40 / GSM: +689 79 75 27
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Hi Jean-Denis, Your log shows the Mediatrix GW has problems. It sends a DCS signal to the Asterisk box, but doesn't following it with TCF as it should. The asterisk box times out waiting for TCF and tries to take recovery action which fails. Spandsp has some workarounds for bugs in Mediatrix boxes. They usually work OK. Regards, Steve On 03/27/2012 08:02 AM, Jean-Denis Girard wrote:> -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > - -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Hi list, > > I'm having difficulties when receiving faxes from the PSTN with this > relatively simple installation: > PSTN<--PRI--> GW<--T.38--> Asterisk > > The gateway is a Mediatrix 3301 (firmware Dgw 2.0.14.251). It's > configured to transmit faxes as T.38. I may have missed something in its > configuration, but it does switch to T.38 when a fax is detected. On the > Asterisk side, I'm using 10.2.1 with spandsp-0.0.6-pre20 and ReceiveFax > from res_fax_spandsp. ${FAXSTATUS} returns FAILED and ${FAXERROR} > "Disconnected after permitted retries". > > I did a network capture, attached to this mail: from my understanding, > T.38 is accepted by Asterisk, then there seems to be some UDPTL traffic, > which I don't understand... > > Why does it fail, and what is wrong? I'd appreciate if someone could > send me advice / suggestions. > > > Thanks, > - - -- > Jean-Denis Girard > > SysNux Syst?mes Linux en Polyn?sie fran?aise > http://www.sysnux.pf/ T?l: +689 50 10 40 / GSM: +689 79 75 27 > - -----BEGIN PGP SIGNATURE----- > > iEYEARECAAYFAk9xAc0ACgkQuu7Rv+oOo/iE+gCgqJXSlF/db4VCV0wvbL+X5yBv > bLMAoKl6DZcgmNEMeJcqPz+3Gg3SpoFh > =0DfY > - -----END PGP SIGNATURE----- > > -----BEGIN PGP SIGNATURE----- > > iEYEARECAAYFAk9xA4cACgkQuu7Rv+oOo/geRwCfTPHDNUa6d0HrmypPrWyPz8i/ > A7kAnjz96glRD0hqDlO2wzvxV1wVM0uI > =lWvs > -----END PGP SIGNATURE----- > > > -- > _____________________________________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > New to Asterisk? Join us for a live introductory webinar every Thurs: > http://www.asterisk.org/hello > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi Steve, Le 26/03/2012 14:50, Steve Underwood a ?crit :> Spandsp has some workarounds for bugs in Mediatrix boxes. They usually > work OK.I just made a couple of tests with spandsp snapshot 20120328: I now get "The call dropped prematurely". Network capture is attached, hope that helps. Thanks, - -- Jean-Denis Girard SysNux Syst?mes Linux en Polyn?sie fran?aise http://www.sysnux.pf/ T?l: +689 50 10 40 / GSM: +689 79 75 27 -----BEGIN PGP SIGNATURE----- iEYEARECAAYFAk9zrHoACgkQuu7Rv+oOo/gFeACeN+xlKqUOsduA8132kiGP7Lbc gpIAn2n/b6DoN/80G0kQv/Q8MkraSJRW =NVE/ -----END PGP SIGNATURE----- -------------- next part -------------- A non-text attachment was scrubbed... Name: fax-ast10-2.pcap.bz2 Type: application/x-bzip2 Size: 6721 bytes Desc: not available URL: <http://lists.digium.com/pipermail/asterisk-users/attachments/20120328/063774be/attachment.bin>