Problems with ucom/uftdi and sendfax on 10.2 p12 (works like a charm with 7.4)

Tue Mar 1 20:00:49 UTC 2016

Hi all,

I currently encounter a problem with sending faxes with new server and FreeBSD 10.2-RELEASE p12
using mgetty+sendfax and RS232-Modems via USB to RS232-Adapter (com, uftdi).

Problem is that _after_ sending the first page, the reply of modem is not read correctly.

In Error case, Faxlog says:

02/29 18:46:10 aU4    read 64, write 64
02/29 18:46:10 aU4    read 52, write 52
02/29 18:46:10 aU4  page complete, 40900 bytes sent
02/29 18:46:10 aU4  sending DLE ','
02/29 18:46:10 aU4    got:[0a][0d][0a]OK[0d]
02/29 18:46:18 aU4  got response: 'OK'
02/29 18:46:18 aU4   fax_send_page("f2.g3") started...
02/29 18:46:18 aU4   tio_set_flow_control( HARD )
02/29 18:46:18 aU4  fax_send: 'AT+FDT'
02/29 18:46:18 aU4  fax_wait_for(CONNECT)
02/29 18:46:18 aU4    got:[0a]
02/29 18:48:18 aU4  Warning: got alarm signal!

So I run into timeout because the modem does not reply as expected after AT+FDT-command (maybe even after sending DLE ',‘ because the OK response seems to take some more time than under FreeBSD 7.4).

if I issue "tip modem4" (which is /dev/cuaU4), I get the missing replies including CONNECT from the modem (then leaving tip with "~.“)

root at faxserver:/usr/local/etc/mgetty+sendfax # tip modem4
connected
AT+FDT
CONNECT

+FHS:43

OK
AT+FCLASS=0
OK
~
[EOT]
root at faxserver:/usr/local/etc/mgetty+sendfax #

This works correctly with same modems and USB to RS232-Adapter (uftdi) under FreeBSD 7.4.

02/29 12:18:26 aU4  receiver cap.: '+FIS:1,5,0,2,1,1,0,3' -> fine 144 2D/MR ECM** found **
02/29 12:18:26 aU4  sendfax: IGNORE DCD (carrier) status
02/29 12:18:26 aU4  fax_send: 'AT+FDT'
02/29 12:18:26 aU4  fax_wait_for(CONNECT)
02/29 12:18:33 aU4  transmission par.: '+FCS:1,5,0,2,0,0,0,3'** found **
02/29 12:18:33 aU4  sending f1.g3...
02/29 12:19:04 aU4  page complete, 34495 bytes sent
02/29 12:19:04 aU4  sending DLE ','
02/29 12:19:10 aU4  got response: 'OK'
02/29 12:19:10 aU4  fax_send: 'AT+FDT'
02/29 12:19:10 aU4  fax_wait_for(CONNECT)** found **
02/29 12:19:11 aU4  sending f2.g3...
02/29 12:19:55 aU4  page complete, 60064 bytes sent
02/29 12:19:55 aU4  sending DLE ','
02/29 12:20:01 aU4  got response: 'OK'
02/29 12:20:01 aU4  fax_send: 'AT+FDT'
02/29 12:20:01 aU4  fax_wait_for(CONNECT)** found **
02/29 12:20:01 aU4  sending f3.g3...
02/29 12:20:52 aU4  page complete, 71335 bytes sent
02/29 12:20:52 aU4  sending DLE ','
02/29 12:20:57 aU4  got response: 'OK'
02/29 12:20:57 aU4  fax_send: 'AT+FDT'
02/29 12:20:57 aU4  fax_wait_for(CONNECT)** found **
02/29 12:20:58 aU4  sending f4.g3...
02/29 12:21:40 aU4  page complete, 58628 bytes sent
02/29 12:21:40 aU4  sending DLE '.'
02/29 12:21:49 aU4  connection hangup: '+FHS:00'
02/29 12:21:49 aU4  got response: 'OK'
02/29 12:21:49 aU4  fax_send: 'AT+FCLASS=0'

This is with devolo 56k i ISDN-modems, but it looks more like a USB interface communication issue to me.

Modems and USB-to-RS232 are the same - connected to FreeBSD 7.4 servers works (sends all pages), connected to 10.2 server does not work (sends first page only).

I can also provide dmesg.boot details on request but didn’t want to pollute the list.

Difference with stty -a /dev/cuaU4 seems to be clocal instead of -clocal which I can’t set for cuaU4, only for .init and .lock. which does not help.
7.4 Kernel comes with uftdi and ucom compiled in.
10.2 Kernel has the same issues with ucom and uftdi loaded as kernel modules or compiled in.

mgetty+sendfax is version 1.1.35_1 on FreeBSD 7.4 and version 1.1.37 on FreeBSD 10.2-RELEASE p12.

Any other ideas where to look further or what to investigate?

Many thanks and best regards,
Holger

__________________________________________________________

Holger Kipp
Diplom-Mathematiker
Senior Consultant

Tel. : +49 30 436 58 114
Fax. : +49 30 436 58 214
Mobil: +49 178 36 58 114
Email: holger.kipp at alogis.com

alogis AG
Alt-Moabit 90b
D-10559 Berlin

http://www.alogis.com
__________________________________________________________

alogis AG
Sitz/Registergericht: Berlin/AG Charlottenburg, HRB 71484
Vorstand: Arne Friedrichs, Joern Samuelson
Aufsichtsratsvorsitzender: Reinhard Mielke